Md. Omarsany Bappy, Tahir Mahmud, Md. A. Ali, R. Aziz, A. Morshed
Condensation is the change of physical state of matter from gas phase into liquid phase. Condensation occurs whenever a vapor comes into contact with a surface at a temperature lower than the satur...
冷凝是物质的物理状态由气相变为液相的过程。每当蒸汽与温度低于饱和的表面接触时，就会发生冷凝。
{"title":"Experimental study of condensation behavior on a vertical micro-grooved copper plate","authors":"Md. Omarsany Bappy, Tahir Mahmud, Md. A. Ali, R. Aziz, A. Morshed","doi":"10.1063/1.5115911","DOIUrl":"https://doi.org/10.1063/1.5115911","url":null,"abstract":"Condensation is the change of physical state of matter from gas phase into liquid phase. Condensation occurs whenever a vapor comes into contact with a surface at a temperature lower than the satur...","PeriodicalId":423885,"journal":{"name":"8TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125037270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Preface: 8th BSME International Conference on Thermal Engineering","authors":"IslamA. K. M. Sadrul, A. Ruhul, Alimohammad","doi":"10.1063/1.5115841","DOIUrl":"https://doi.org/10.1063/1.5115841","url":null,"abstract":"","PeriodicalId":423885,"journal":{"name":"8TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127475720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this paper, a comprehensive numerical study on viscous incompressible fluid flow and heat transfer through a loosely coiled square duct has been presented. Spectral method is used as a basic too...
{"title":"Hydrodynamic instability with convective heat transfer through a curved channel with strong rotational speed","authors":"M. Hasan, R. Mondal, T. Kouchi, S. Yanase","doi":"10.1063/1.5115851","DOIUrl":"https://doi.org/10.1063/1.5115851","url":null,"abstract":"In this paper, a comprehensive numerical study on viscous incompressible fluid flow and heat transfer through a loosely coiled square duct has been presented. Spectral method is used as a basic too...","PeriodicalId":423885,"journal":{"name":"8TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116997031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this paper, a spectral-based numerical result is presented for the fully developed two-dimensional flow of viscous incompressible fluid through a rotating curved rectangular duct. The bottom wall of the duct is heated while cooling from the ceiling. A rotation of the duct about the centre of curvature is imposed in the positive direction for the constant Dean number Dn = 1000 over a wide range of the Taylor number 0≤Tr≤2000. First, solution structure of the steady solutions is obtained by the Newton-Raphson iteration method. Then, we investigated unsteady solutions by time evolution calculations justified by power spectrum of the solutions, and it is found that when there is no rotation, the flow is chaotic but as the rotational speed increases, the chaotic flow turns into steady-state flow through periodic or multi-periodic flows. This study shows that combined effects of the centrifugal and Coriolis forces counteract each other in a nonlinear manner which results in to turn the chaotic flow into steady-state flow. The present study demonstrates the role of secondary vortices on convective heat transfer which shows that secondary flow enhances heat transfer in the flow. Typical contours of secondary flow patterns and temperature distribution are also obtained at several values of Tr, and it is found that the unsteady flow consists of two- to eight-vortex solutions if the duct rotation is involved in the present case.In this paper, a spectral-based numerical result is presented for the fully developed two-dimensional flow of viscous incompressible fluid through a rotating curved rectangular duct. The bottom wall of the duct is heated while cooling from the ceiling. A rotation of the duct about the centre of curvature is imposed in the positive direction for the constant Dean number Dn = 1000 over a wide range of the Taylor number 0≤Tr≤2000. First, solution structure of the steady solutions is obtained by the Newton-Raphson iteration method. Then, we investigated unsteady solutions by time evolution calculations justified by power spectrum of the solutions, and it is found that when there is no rotation, the flow is chaotic but as the rotational speed increases, the chaotic flow turns into steady-state flow through periodic or multi-periodic flows. This study shows that combined effects of the centrifugal and Coriolis forces counteract each other in a nonlinear manner which results in to turn the chaotic flow into stea...
{"title":"Pressure-driven flow instability with convective heat transfer through a rotating curved rectangular duct with differentially heated top and bottom walls","authors":"M. Islam, S. Ray, M. Hasan, R. Mondal","doi":"10.1063/1.5115856","DOIUrl":"https://doi.org/10.1063/1.5115856","url":null,"abstract":"In this paper, a spectral-based numerical result is presented for the fully developed two-dimensional flow of viscous incompressible fluid through a rotating curved rectangular duct. The bottom wall of the duct is heated while cooling from the ceiling. A rotation of the duct about the centre of curvature is imposed in the positive direction for the constant Dean number Dn = 1000 over a wide range of the Taylor number 0≤Tr≤2000. First, solution structure of the steady solutions is obtained by the Newton-Raphson iteration method. Then, we investigated unsteady solutions by time evolution calculations justified by power spectrum of the solutions, and it is found that when there is no rotation, the flow is chaotic but as the rotational speed increases, the chaotic flow turns into steady-state flow through periodic or multi-periodic flows. This study shows that combined effects of the centrifugal and Coriolis forces counteract each other in a nonlinear manner which results in to turn the chaotic flow into steady-state flow. The present study demonstrates the role of secondary vortices on convective heat transfer which shows that secondary flow enhances heat transfer in the flow. Typical contours of secondary flow patterns and temperature distribution are also obtained at several values of Tr, and it is found that the unsteady flow consists of two- to eight-vortex solutions if the duct rotation is involved in the present case.In this paper, a spectral-based numerical result is presented for the fully developed two-dimensional flow of viscous incompressible fluid through a rotating curved rectangular duct. The bottom wall of the duct is heated while cooling from the ceiling. A rotation of the duct about the centre of curvature is imposed in the positive direction for the constant Dean number Dn = 1000 over a wide range of the Taylor number 0≤Tr≤2000. First, solution structure of the steady solutions is obtained by the Newton-Raphson iteration method. Then, we investigated unsteady solutions by time evolution calculations justified by power spectrum of the solutions, and it is found that when there is no rotation, the flow is chaotic but as the rotational speed increases, the chaotic flow turns into steady-state flow through periodic or multi-periodic flows. This study shows that combined effects of the centrifugal and Coriolis forces counteract each other in a nonlinear manner which results in to turn the chaotic flow into stea...","PeriodicalId":423885,"journal":{"name":"8TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124090918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ishtier Rahman, R. Nath, Sajid Nakvee, Md. Touhidur Rahman Evan
Mounting wind turbines on roof-tops of commercial and residential buildings can be a very promising source of power generation. This study emphasizes on three different designs of roof-tops to find out a suitable shape in order to utilize a particular design as an accelerator of the general wind flow. A computational study was carried out among these shapes namely half circular, straight convergent and curved convergent. The CFD tool ANSYS Fluent was used to analyze the velocity profiles at different locations of the roof-tops. In addition, suitable locations were also studied to mount the turbines. Case study shows that Chittagong, Comilla and some certain places in Dhaka have the minimal wind speed to initiate the turbine to generate energy. A newly designed micro wind-turbine has been proposed as an outcome of this study with a view to harness the wind speed efficiently in the perspective of Bangladesh.Mounting wind turbines on roof-tops of commercial and residential buildings can be a very promising source of power generation. This study emphasizes on three different designs of roof-tops to find out a suitable shape in order to utilize a particular design as an accelerator of the general wind flow. A computational study was carried out among these shapes namely half circular, straight convergent and curved convergent. The CFD tool ANSYS Fluent was used to analyze the velocity profiles at different locations of the roof-tops. In addition, suitable locations were also studied to mount the turbines. Case study shows that Chittagong, Comilla and some certain places in Dhaka have the minimal wind speed to initiate the turbine to generate energy. A newly designed micro wind-turbine has been proposed as an outcome of this study with a view to harness the wind speed efficiently in the perspective of Bangladesh.
{"title":"A computational study on building’s roof shapes to utilize wind energy: Renewable energy application in Bangladesh","authors":"Ishtier Rahman, R. Nath, Sajid Nakvee, Md. Touhidur Rahman Evan","doi":"10.1063/1.5115950","DOIUrl":"https://doi.org/10.1063/1.5115950","url":null,"abstract":"Mounting wind turbines on roof-tops of commercial and residential buildings can be a very promising source of power generation. This study emphasizes on three different designs of roof-tops to find out a suitable shape in order to utilize a particular design as an accelerator of the general wind flow. A computational study was carried out among these shapes namely half circular, straight convergent and curved convergent. The CFD tool ANSYS Fluent was used to analyze the velocity profiles at different locations of the roof-tops. In addition, suitable locations were also studied to mount the turbines. Case study shows that Chittagong, Comilla and some certain places in Dhaka have the minimal wind speed to initiate the turbine to generate energy. A newly designed micro wind-turbine has been proposed as an outcome of this study with a view to harness the wind speed efficiently in the perspective of Bangladesh.Mounting wind turbines on roof-tops of commercial and residential buildings can be a very promising source of power generation. This study emphasizes on three different designs of roof-tops to find out a suitable shape in order to utilize a particular design as an accelerator of the general wind flow. A computational study was carried out among these shapes namely half circular, straight convergent and curved convergent. The CFD tool ANSYS Fluent was used to analyze the velocity profiles at different locations of the roof-tops. In addition, suitable locations were also studied to mount the turbines. Case study shows that Chittagong, Comilla and some certain places in Dhaka have the minimal wind speed to initiate the turbine to generate energy. A newly designed micro wind-turbine has been proposed as an outcome of this study with a view to harness the wind speed efficiently in the perspective of Bangladesh.","PeriodicalId":423885,"journal":{"name":"8TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130834871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Cardiovascular diseases are one of the major concerns of the present age. Atherosclerosis, heart blockage, heart failing are very common of them which are caused by plaque formation in the T-and Y-shaped junctions of blood vessels. At the present study concentration has been focused on the studies of pulsatile non-Newtonian flow behavior through Y-junction for unit flow ratio experimentally and numerically. Pulsatile flow similar to external iliac vein has been generated using gear pump. Four pressure sensors have been inserted two at the upstream and two at the downstream points to visualize the pressure condition. 50% (w/w) glycerin-water solution has been selected as working fluid as its density and viscosity are very much similar to blood-matrix. Numerical simulation has been accomplished by Ansys Fluent 14.5 software where Carreau model has been used to characterize the non-Newtonian flow behavior of blood-matrix. X-velocity contour, Z-vorticity contour, pressure wave form and vector plot have been studied in details. Those results can be used to predict the flow behavior through veins and arteries and to detect the recirculation zone.Cardiovascular diseases are one of the major concerns of the present age. Atherosclerosis, heart blockage, heart failing are very common of them which are caused by plaque formation in the T-and Y-shaped junctions of blood vessels. At the present study concentration has been focused on the studies of pulsatile non-Newtonian flow behavior through Y-junction for unit flow ratio experimentally and numerically. Pulsatile flow similar to external iliac vein has been generated using gear pump. Four pressure sensors have been inserted two at the upstream and two at the downstream points to visualize the pressure condition. 50% (w/w) glycerin-water solution has been selected as working fluid as its density and viscosity are very much similar to blood-matrix. Numerical simulation has been accomplished by Ansys Fluent 14.5 software where Carreau model has been used to characterize the non-Newtonian flow behavior of blood-matrix. X-velocity contour, Z-vorticity contour, pressure wave form and vector plot have been s...
{"title":"Non-Newtonian pulsatile blood flow dynamics around a Y-junction","authors":"D. Bhowmick, Md Toukir Hasan, A. Hasan","doi":"10.1063/1.5115936","DOIUrl":"https://doi.org/10.1063/1.5115936","url":null,"abstract":"Cardiovascular diseases are one of the major concerns of the present age. Atherosclerosis, heart blockage, heart failing are very common of them which are caused by plaque formation in the T-and Y-shaped junctions of blood vessels. At the present study concentration has been focused on the studies of pulsatile non-Newtonian flow behavior through Y-junction for unit flow ratio experimentally and numerically. Pulsatile flow similar to external iliac vein has been generated using gear pump. Four pressure sensors have been inserted two at the upstream and two at the downstream points to visualize the pressure condition. 50% (w/w) glycerin-water solution has been selected as working fluid as its density and viscosity are very much similar to blood-matrix. Numerical simulation has been accomplished by Ansys Fluent 14.5 software where Carreau model has been used to characterize the non-Newtonian flow behavior of blood-matrix. X-velocity contour, Z-vorticity contour, pressure wave form and vector plot have been studied in details. Those results can be used to predict the flow behavior through veins and arteries and to detect the recirculation zone.Cardiovascular diseases are one of the major concerns of the present age. Atherosclerosis, heart blockage, heart failing are very common of them which are caused by plaque formation in the T-and Y-shaped junctions of blood vessels. At the present study concentration has been focused on the studies of pulsatile non-Newtonian flow behavior through Y-junction for unit flow ratio experimentally and numerically. Pulsatile flow similar to external iliac vein has been generated using gear pump. Four pressure sensors have been inserted two at the upstream and two at the downstream points to visualize the pressure condition. 50% (w/w) glycerin-water solution has been selected as working fluid as its density and viscosity are very much similar to blood-matrix. Numerical simulation has been accomplished by Ansys Fluent 14.5 software where Carreau model has been used to characterize the non-Newtonian flow behavior of blood-matrix. X-velocity contour, Z-vorticity contour, pressure wave form and vector plot have been s...","PeriodicalId":423885,"journal":{"name":"8TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130488915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. Sarkar, S. M. Arifuzzaman, E. S. Reza-Rabbi, Md. Shakhaoath Khan, S. Ahmmed
{"title":"Computational modelling of chemically reactive and radiative flow of Casson-Carreau nanofluids over an inclined cylindrical surface with bended Lorentz force presence in porous medium","authors":"T. Sarkar, S. M. Arifuzzaman, E. S. Reza-Rabbi, Md. Shakhaoath Khan, S. Ahmmed","doi":"10.1063/1.5115893","DOIUrl":"https://doi.org/10.1063/1.5115893","url":null,"abstract":"","PeriodicalId":423885,"journal":{"name":"8TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133814888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The ground surface temperature changes with the diurnal cycle of solar radiation and ambient air temperature. However, the amplitude of the ground temperature variation diminishes with the increase of the depth of the ground and after a certain depth of the ground, it becomes almost constant, where is termed “undisturbed ground temperature (UGT)”. At this depth, the seasonal changes of solar radiation and ambient air temperature changes will no longer affect onground temperature. It is one of the important parameters for designing of the ground heat exchangersand building energy analyses. In this study ground temperatures at various depths in Melbourne were investigated using a 40 m deep borehole instrumented with thermistors. The ground temperatures at various depths (0 m to 40 m) in Melbourne were also simulated by using three methods: Kasuda formula method, simulation (TRNSYS, Type 77), and simplified correlation (developed by Ouzzane et al. in 2015) and the results were compared with the measured data. Root mean square error (RMSE) and mean bias error (MBE) were used to validate and verify the methods. It was found that the estimated ground temperatures at 2, 21, and 40 m depths by Kasuda formula method and simulation (TRNSYS)have the same trends as that of the measured data. The measured annual temperatures of ground at 2 m depth were between 14.7 °C and 19.8 °C, while the temperature at 21 m and 40 m depths remained almost constant. RMSE and MBEof the simulation (TRNSYS, Type 77) were found to be 1.39°C, and -1.39°C respectively compared to measured data at 21 m depth. Based on these values, we conclude that simulation (TRNSYS, Type 77) can reliably predict the ground temperature for the selected sitein Melbourne.The ground surface temperature changes with the diurnal cycle of solar radiation and ambient air temperature. However, the amplitude of the ground temperature variation diminishes with the increase of the depth of the ground and after a certain depth of the ground, it becomes almost constant, where is termed “undisturbed ground temperature (UGT)”. At this depth, the seasonal changes of solar radiation and ambient air temperature changes will no longer affect onground temperature. It is one of the important parameters for designing of the ground heat exchangersand building energy analyses. In this study ground temperatures at various depths in Melbourne were investigated using a 40 m deep borehole instrumented with thermistors. The ground temperatures at various depths (0 m to 40 m) in Melbourne were also simulated by using three methods: Kasuda formula method, simulation (TRNSYS, Type 77), and simplified correlation (developed by Ouzzane et al. in 2015) and the results were compared with the measured data...
地表温度随太阳辐射和环境气温的日循环而变化。但地温变化幅度随地表深度的增加而减小，达到一定深度后基本保持不变，称为“无扰动地温”。在这个深度，太阳辐射的季节变化和周围空气温度的变化将不再影响地面温度。它是地下换热器设计和建筑能耗分析的重要参数之一。在这项研究中，使用40米深的热敏电阻测量了墨尔本不同深度的地温。采用Kasuda公式法、模拟(TRNSYS, Type 77)和简化相关(Ouzzane et al. 2015)三种方法对墨尔本不同深度(0 m ~ 40 m)的地温进行模拟，并与实测数据进行对比。采用均方根误差(RMSE)和平均偏差误差(MBE)对方法进行验证和验证。结果表明，用Kasuda公式法和TRNSYS模拟得到的2、21和40 m深度的地温值与实测数据具有相同的变化趋势。2 m深度地表年平均温度在14.7 ~ 19.8℃之间，21 m和40 m深度地表年平均温度基本保持不变。与21 m深度的实测数据相比，模拟(TRNSYS, Type 77)的RMSE和mbec分别为1.39°C和-1.39°C。基于这些值，我们得出结论，模拟(TRNSYS, Type 77)可以可靠地预测墨尔本选定地点的地温。地表温度随太阳辐射和环境气温的日循环而变化。但地温变化幅度随地表深度的增加而减小，达到一定深度后基本保持不变，称为“无扰动地温”。在这个深度，太阳辐射的季节变化和周围空气温度的变化将不再影响地面温度。它是地下换热器设计和建筑能耗分析的重要参数之一。在这项研究中，使用40米深的热敏电阻测量了墨尔本不同深度的地温。采用Kasuda公式法、模拟(TRNSYS, Type 77)和简化相关(Ouzzane et al. 2015)三种方法对墨尔本不同深度(0 m ~ 40 m)的地温进行了模拟，并将结果与实测数据进行了对比。
{"title":"Undisturbed ground temperature in Melbourne","authors":"Sheikh Khaleduzzaman Shah, L. Aye, B. Rismanchi","doi":"10.1063/1.5115928","DOIUrl":"https://doi.org/10.1063/1.5115928","url":null,"abstract":"The ground surface temperature changes with the diurnal cycle of solar radiation and ambient air temperature. However, the amplitude of the ground temperature variation diminishes with the increase of the depth of the ground and after a certain depth of the ground, it becomes almost constant, where is termed “undisturbed ground temperature (UGT)”. At this depth, the seasonal changes of solar radiation and ambient air temperature changes will no longer affect onground temperature. It is one of the important parameters for designing of the ground heat exchangersand building energy analyses. In this study ground temperatures at various depths in Melbourne were investigated using a 40 m deep borehole instrumented with thermistors. The ground temperatures at various depths (0 m to 40 m) in Melbourne were also simulated by using three methods: Kasuda formula method, simulation (TRNSYS, Type 77), and simplified correlation (developed by Ouzzane et al. in 2015) and the results were compared with the measured data. Root mean square error (RMSE) and mean bias error (MBE) were used to validate and verify the methods. It was found that the estimated ground temperatures at 2, 21, and 40 m depths by Kasuda formula method and simulation (TRNSYS)have the same trends as that of the measured data. The measured annual temperatures of ground at 2 m depth were between 14.7 °C and 19.8 °C, while the temperature at 21 m and 40 m depths remained almost constant. RMSE and MBEof the simulation (TRNSYS, Type 77) were found to be 1.39°C, and -1.39°C respectively compared to measured data at 21 m depth. Based on these values, we conclude that simulation (TRNSYS, Type 77) can reliably predict the ground temperature for the selected sitein Melbourne.The ground surface temperature changes with the diurnal cycle of solar radiation and ambient air temperature. However, the amplitude of the ground temperature variation diminishes with the increase of the depth of the ground and after a certain depth of the ground, it becomes almost constant, where is termed “undisturbed ground temperature (UGT)”. At this depth, the seasonal changes of solar radiation and ambient air temperature changes will no longer affect onground temperature. It is one of the important parameters for designing of the ground heat exchangersand building energy analyses. In this study ground temperatures at various depths in Melbourne were investigated using a 40 m deep borehole instrumented with thermistors. The ground temperatures at various depths (0 m to 40 m) in Melbourne were also simulated by using three methods: Kasuda formula method, simulation (TRNSYS, Type 77), and simplified correlation (developed by Ouzzane et al. in 2015) and the results were compared with the measured data...","PeriodicalId":423885,"journal":{"name":"8TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114073133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
South Asia makes up nearly one quarter of the world’s population. Yet its per capita yearly electric power consumption is the 2nd lowest (just above the Sub Saharan Africa) compared to any regions and sub regions in the world. Access to power and meagre per capita consumption make South Asia one of the poorest regions in the world based on economic and human development indices. Limited indigenous energy resources of individual nations in South Asia are not enough to generate adequate power for rapid industrialization, economic and social development. Moreover, the availability of limited indigenous energy resources varies among South Asian nations. The power demand and supply also differ due to seasonal variability. With rapidly rising power demand in all South Asian countries, there are opportunities for cooperation and optimization of available generated power through cross-border power trade. This paper reviews power present generation in South Asia and highlights the potential for cross border power trade to boast regional economic development and prosperity.South Asia makes up nearly one quarter of the world’s population. Yet its per capita yearly electric power consumption is the 2nd lowest (just above the Sub Saharan Africa) compared to any regions and sub regions in the world. Access to power and meagre per capita consumption make South Asia one of the poorest regions in the world based on economic and human development indices. Limited indigenous energy resources of individual nations in South Asia are not enough to generate adequate power for rapid industrialization, economic and social development. Moreover, the availability of limited indigenous energy resources varies among South Asian nations. The power demand and supply also differ due to seasonal variability. With rapidly rising power demand in all South Asian countries, there are opportunities for cooperation and optimization of available generated power through cross-border power trade. This paper reviews power present generation in South Asia and highlights the potential for cross border power ...
{"title":"South Asia’s power generation and cross-border power trading","authors":"F. Alam, S. Ahsan, Q. Alam","doi":"10.1063/1.5115970","DOIUrl":"https://doi.org/10.1063/1.5115970","url":null,"abstract":"South Asia makes up nearly one quarter of the world’s population. Yet its per capita yearly electric power consumption is the 2nd lowest (just above the Sub Saharan Africa) compared to any regions and sub regions in the world. Access to power and meagre per capita consumption make South Asia one of the poorest regions in the world based on economic and human development indices. Limited indigenous energy resources of individual nations in South Asia are not enough to generate adequate power for rapid industrialization, economic and social development. Moreover, the availability of limited indigenous energy resources varies among South Asian nations. The power demand and supply also differ due to seasonal variability. With rapidly rising power demand in all South Asian countries, there are opportunities for cooperation and optimization of available generated power through cross-border power trade. This paper reviews power present generation in South Asia and highlights the potential for cross border power trade to boast regional economic development and prosperity.South Asia makes up nearly one quarter of the world’s population. Yet its per capita yearly electric power consumption is the 2nd lowest (just above the Sub Saharan Africa) compared to any regions and sub regions in the world. Access to power and meagre per capita consumption make South Asia one of the poorest regions in the world based on economic and human development indices. Limited indigenous energy resources of individual nations in South Asia are not enough to generate adequate power for rapid industrialization, economic and social development. Moreover, the availability of limited indigenous energy resources varies among South Asian nations. The power demand and supply also differ due to seasonal variability. With rapidly rising power demand in all South Asian countries, there are opportunities for cooperation and optimization of available generated power through cross-border power trade. This paper reviews power present generation in South Asia and highlights the potential for cross border power ...","PeriodicalId":423885,"journal":{"name":"8TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124685258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Saha, Abrar A. Khan, Tanveer Islam Joy, A. Hoque, Rafsun Hossain Mridha, Md. Rubel Mia, M. Rahman
Fire incident and subsequent evacuation from a pharmaceutical cleanroom facility possess an interesting problem because of the unique operating condition and occupant characteristics that exist in such facility. In the present study, fire and evacuation modelling and safety analysis of a typical pharmaceutical cleanroom facility in Bangladesh is performed. A computational fluid dynamics (CFD) tool PyroSim is used for simulating the fire in the cleanroom and evacuation analysis is performed using a continuous egress modeling software, Pathfinder. In simulating the fire and smoke propagation as well as the evacuation scenario, commonly practiced values, protocols and fuel load characteristics in the pharmaceutical industries of Bangladesh are employed. Two different fire scenarios are considered with a variation in the fuel load and type (ethanol and cardboard), and the location of the origin of the fire. The propagation of smoke and fire, temperature distribution around the cleanroom, concentration of toxic gases and visibility at different sections of the cleanroom are examined. It is found that for the case of the high fuel load in the packaging section in the 1st floor, 12 occupants fail to safely evacuate from the 5-storied pharmaceutical building. The effects of different specific operating characteristics and practices particular to a cleanroom facility on theoccupant evacuationare considered and analyzed.Fire incident and subsequent evacuation from a pharmaceutical cleanroom facility possess an interesting problem because of the unique operating condition and occupant characteristics that exist in such facility. In the present study, fire and evacuation modelling and safety analysis of a typical pharmaceutical cleanroom facility in Bangladesh is performed. A computational fluid dynamics (CFD) tool PyroSim is used for simulating the fire in the cleanroom and evacuation analysis is performed using a continuous egress modeling software, Pathfinder. In simulating the fire and smoke propagation as well as the evacuation scenario, commonly practiced values, protocols and fuel load characteristics in the pharmaceutical industries of Bangladesh are employed. Two different fire scenarios are considered with a variation in the fuel load and type (ethanol and cardboard), and the location of the origin of the fire. The propagation of smoke and fire, temperature distribution around the cleanroom, concentration of toxi...
{"title":"Fire and evacuation modelling for a pharmaceutical cleanroom facility","authors":"S. Saha, Abrar A. Khan, Tanveer Islam Joy, A. Hoque, Rafsun Hossain Mridha, Md. Rubel Mia, M. Rahman","doi":"10.1063/1.5115929","DOIUrl":"https://doi.org/10.1063/1.5115929","url":null,"abstract":"Fire incident and subsequent evacuation from a pharmaceutical cleanroom facility possess an interesting problem because of the unique operating condition and occupant characteristics that exist in such facility. In the present study, fire and evacuation modelling and safety analysis of a typical pharmaceutical cleanroom facility in Bangladesh is performed. A computational fluid dynamics (CFD) tool PyroSim is used for simulating the fire in the cleanroom and evacuation analysis is performed using a continuous egress modeling software, Pathfinder. In simulating the fire and smoke propagation as well as the evacuation scenario, commonly practiced values, protocols and fuel load characteristics in the pharmaceutical industries of Bangladesh are employed. Two different fire scenarios are considered with a variation in the fuel load and type (ethanol and cardboard), and the location of the origin of the fire. The propagation of smoke and fire, temperature distribution around the cleanroom, concentration of toxic gases and visibility at different sections of the cleanroom are examined. It is found that for the case of the high fuel load in the packaging section in the 1st floor, 12 occupants fail to safely evacuate from the 5-storied pharmaceutical building. The effects of different specific operating characteristics and practices particular to a cleanroom facility on theoccupant evacuationare considered and analyzed.Fire incident and subsequent evacuation from a pharmaceutical cleanroom facility possess an interesting problem because of the unique operating condition and occupant characteristics that exist in such facility. In the present study, fire and evacuation modelling and safety analysis of a typical pharmaceutical cleanroom facility in Bangladesh is performed. A computational fluid dynamics (CFD) tool PyroSim is used for simulating the fire in the cleanroom and evacuation analysis is performed using a continuous egress modeling software, Pathfinder. In simulating the fire and smoke propagation as well as the evacuation scenario, commonly practiced values, protocols and fuel load characteristics in the pharmaceutical industries of Bangladesh are employed. Two different fire scenarios are considered with a variation in the fuel load and type (ethanol and cardboard), and the location of the origin of the fire. The propagation of smoke and fire, temperature distribution around the cleanroom, concentration of toxi...","PeriodicalId":423885,"journal":{"name":"8TH BSME INTERNATIONAL CONFERENCE ON THERMAL ENGINEERING","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128846255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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