Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India最新文献
Saurabh Patel, Sharey Deep Guleria, Aniket Pati, Parmod Kumar
Experiments have examined the phenomenon of direct contact condensation when steam is injected vertically into the subcooled water pool. The investigation is carried out by varying the steam mass flow rate and submergence depth of the steam injection pipe in the range of 10-50 kg/hr and 1-13 cm, respectively. The behavior of the bubble that appeared at the pipe outlet, transient heat transfer coefficient, pressure variation in the steam injection pipe, and its associated frequency have been analyzed. The images captured by high speed-camera showed different bubble shapes. The overall cycle time of bubble evolution has decreased with an increase in the mass flow rate and increased with an increase in the pipe submergence depth. The time averaged heat transfer coefficient increased with an increase in the mass flow rate and decreased with the rise of the pipe submergence depth. The pressure drop within the steam injection pipe shows the parabolic variation with an increase in the mass flow rate and is slightly influenced by the submergence depth due to changes in interfacial structures within the pipe. The peak frequency associated with the pressure has increased with an increase in the mass flow rate and decreased with an increase in the pipe submergence depth at higher mass flow rates. The FFT (Fast Fourier Transform) of interfacial area of the larger bubble at the pipe outlet shows that the first peak frequency lies between 0.5-5 Hz, and the second peak frequency lies in the range of 25-30 Hz.
{"title":"Experimental analysis of direct contact condensation during vertical injection of steam on subcooled water pool","authors":"Saurabh Patel, Sharey Deep Guleria, Aniket Pati, Parmod Kumar","doi":"10.1615/ihmtc-2021.2220","DOIUrl":"https://doi.org/10.1615/ihmtc-2021.2220","url":null,"abstract":"Experiments have examined the phenomenon of direct contact condensation when steam is injected vertically into the subcooled water pool. The investigation is carried out by varying the steam mass flow rate and submergence depth of the steam injection pipe in the range of 10-50 kg/hr and 1-13 cm, respectively. The behavior of the bubble that appeared at the pipe outlet, transient heat transfer coefficient, pressure variation in the steam injection pipe, and its associated frequency have been analyzed. The images captured by high speed-camera showed different bubble shapes. The overall cycle time of bubble evolution has decreased with an increase in the mass flow rate and increased with an increase in the pipe submergence depth. The time averaged heat transfer coefficient increased with an increase in the mass flow rate and decreased with the rise of the pipe submergence depth. The pressure drop within the steam injection pipe shows the parabolic variation with an increase in the mass flow rate and is slightly influenced by the submergence depth due to changes in interfacial structures within the pipe. The peak frequency associated with the pressure has increased with an increase in the mass flow rate and decreased with an increase in the pipe submergence depth at higher mass flow rates. The FFT (Fast Fourier Transform) of interfacial area of the larger bubble at the pipe outlet shows that the first peak frequency lies between 0.5-5 Hz, and the second peak frequency lies in the range of 25-30 Hz.","PeriodicalId":275628,"journal":{"name":"Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126295669","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}
A.K. Sharma, R. Kothari, Jaykumar Joshi, V. Saxena, S. Sahu
The present work is focussed on numerical investigation of the constrained melting of phase change material (n-octadecane) in a circumferentially finned spherical capsule keeping the base and volume of the fins equal in all cases. Four different fin shapes, namely straight, trapezoidal converging, stepped, stepped inverse, located at the center of the spherical capsule are considered for the study A series of two-dimensional transient numerical simulations are carried out. Present numerical results are validated with the existing experimental results of Fan et al. [5]. Various thermal performance parameters is used for comparative analysis. Baseline comparison of fin and no fin case have also been discussed. The least melting time of PCM is 114 min for the stepped fin, while the maximum melting time is 120 min and is reported for the straight fin. The surface area to volume ratio (S/V) of fins has been calculated for every case. Irrespective of the lower S/V ratio, the melting time of inverse stepped fin is lower than straight fin because of the excellent melting performance of inverse stepped fin in weak convection region. From the results, it has been concluded that changing the shape of fin from the base case of straight fin does not change the melting time significantly for fin volume considered in the present study. This research could be used as a reference for LHTES unit fin design optimization in the industrial setting.
{"title":"Effect of fin location on constrained melting heat transfer of phase change material in a spherical capsule: A numerical study","authors":"A.K. Sharma, R. Kothari, Jaykumar Joshi, V. Saxena, S. Sahu","doi":"10.1615/ihmtc-2021.2760","DOIUrl":"https://doi.org/10.1615/ihmtc-2021.2760","url":null,"abstract":"\u0000 The present work is focussed on numerical investigation of the constrained melting of phase change material (n-octadecane) in a circumferentially finned spherical capsule keeping the base and volume of the fins equal in all cases. Four different fin shapes, namely straight, trapezoidal converging, stepped, stepped inverse, located at the center of the spherical capsule are considered for the study A series of two-dimensional transient numerical simulations are carried out. Present numerical results are validated with the existing experimental results of Fan et al. [5]. Various thermal performance parameters is used for comparative analysis. Baseline comparison of fin and no fin case have also been discussed. The least melting time of PCM is 114 min for the stepped fin, while the maximum melting time is 120 min and is reported for the straight fin. The surface area to volume ratio (S/V) of fins has been calculated for every case. Irrespective of the lower S/V ratio, the melting time of inverse stepped fin is lower than straight fin because of the excellent melting performance of inverse stepped fin in weak convection region. From the results, it has been concluded that changing the shape of fin from the base case of straight fin does not change the melting time significantly for fin volume considered in the present study. This research could be used as a reference for LHTES unit fin design optimization in the industrial setting.","PeriodicalId":275628,"journal":{"name":"Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126016582","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}
Megha Rajguru, P. Rahatgaonkar, J. Singh, D. Datta, H. Rammohan
{"title":"3D Computational Fluid Dynamics Analysis to Estimate Temperature Distribution of Spent Fuel Bundle during Dry Transfer Operation","authors":"Megha Rajguru, P. Rahatgaonkar, J. Singh, D. Datta, H. Rammohan","doi":"10.1615/ihmtc-2021.2000","DOIUrl":"https://doi.org/10.1615/ihmtc-2021.2000","url":null,"abstract":"","PeriodicalId":275628,"journal":{"name":"Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115662105","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. V, Rutvik S. Solanki, V. K. Chalamalla, S. Sinha
{"title":"Numerical simulations and analysis of flow past vertical-axis wind turbines employing the actuator line method","authors":"S. V, Rutvik S. Solanki, V. K. Chalamalla, S. Sinha","doi":"10.1615/ihmtc-2021.4110","DOIUrl":"https://doi.org/10.1615/ihmtc-2021.4110","url":null,"abstract":"","PeriodicalId":275628,"journal":{"name":"Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116701753","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":"Analysis of Hypersonic Rarefied Reactive Flow Over RAM-C II Forebody Using hy2Foam Solver","authors":"Gaurav Sharma, A. A. M.","doi":"10.1615/ihmtc-2021.3350","DOIUrl":"https://doi.org/10.1615/ihmtc-2021.3350","url":null,"abstract":"","PeriodicalId":275628,"journal":{"name":"Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127141692","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":"Towards understanding air curtain flows using RANS based numerical simulations","authors":"Tanmay Agrawal, N. K. Jha, V. K. Chalamalla","doi":"10.1615/ihmtc-2021.4120","DOIUrl":"https://doi.org/10.1615/ihmtc-2021.4120","url":null,"abstract":"","PeriodicalId":275628,"journal":{"name":"Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127174077","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":"Vapor Condensation of Iso-Butane over Plain Tube and 24 fpi finned tube placed horizontally","authors":"S. K. Sajjan, A. Dewangan","doi":"10.1615/ihmtc-2021.3850","DOIUrl":"https://doi.org/10.1615/ihmtc-2021.3850","url":null,"abstract":"","PeriodicalId":275628,"journal":{"name":"Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123324770","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":"Experimental Evaluation and Characterisation of PID Controller For Spacecraft Thermal Testing","authors":"Subramanya, Goutam Tanneru","doi":"10.1615/ihmtc-2021.4140","DOIUrl":"https://doi.org/10.1615/ihmtc-2021.4140","url":null,"abstract":"","PeriodicalId":275628,"journal":{"name":"Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115091793","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":"Study of a Waste Heat Recovery Cycle Using Super-Critical Carbon Dioxide as Working Fluid","authors":"Lakshminarayanan Seshadri, Pramod Kumar","doi":"10.1615/ihmtc-2021.540","DOIUrl":"https://doi.org/10.1615/ihmtc-2021.540","url":null,"abstract":"","PeriodicalId":275628,"journal":{"name":"Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115460773","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}
Nandan Saha, Shubham Mishra, V. Verma, J. Chattopadhyay
{"title":"Modelling Fast Hydrogen Deflagration in Partially Obstructed Acceleration Tube of ENACCEF and the Model Constant of Eddy Dissipation Model","authors":"Nandan Saha, Shubham Mishra, V. Verma, J. Chattopadhyay","doi":"10.1615/ihmtc-2021.3540","DOIUrl":"https://doi.org/10.1615/ihmtc-2021.3540","url":null,"abstract":"","PeriodicalId":275628,"journal":{"name":"Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116129610","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}
Proceeding of Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India
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