This study investigates the boiling characteristics of graphene (GNP) nanofluids, graphene-copper (GNP-Cu) composite nanofluids, and graphene-iron (GNP-Fe) composite nanofluids with mass fractions ...
{"title":"Experiments and modeling of boiling heat transfer of GNP nanofluids with metallic elements","authors":"Linfeng Xiang, Yindong Song, Dongshu Yang, Ziyun Zhang, Yong Cui, Kambiz Vafai","doi":"10.1080/08916152.2023.2298495","DOIUrl":"https://doi.org/10.1080/08916152.2023.2298495","url":null,"abstract":"This study investigates the boiling characteristics of graphene (GNP) nanofluids, graphene-copper (GNP-Cu) composite nanofluids, and graphene-iron (GNP-Fe) composite nanofluids with mass fractions ...","PeriodicalId":12091,"journal":{"name":"Experimental Heat Transfer","volume":"135 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139081614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper presents a novel conical copper plate with microgrooves structure to enhance heat transfer by removing accumulated condensate in horizontal surface condensation. The experimental investi...
{"title":"Experimental investigation and visualization of steam condensation heat transfer on horizontal conical surfaces with microgrooves","authors":"Leigang Zhang, Hao Li, Bo Xu, Zhenqian Chen, Guopei Li, Meng Ru","doi":"10.1080/08916152.2023.2298489","DOIUrl":"https://doi.org/10.1080/08916152.2023.2298489","url":null,"abstract":"This paper presents a novel conical copper plate with microgrooves structure to enhance heat transfer by removing accumulated condensate in horizontal surface condensation. The experimental investi...","PeriodicalId":12091,"journal":{"name":"Experimental Heat Transfer","volume":"17 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139050919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-26DOI: 10.1080/08916152.2023.2298494
F. Shokry, M. Abd Elfattah, M. H. Abdel-Aziz, H. A. Farag, G. H. Sedahmed, D. A. El-Gayar
The influence of a helical coil turbulence promoter on liquid-solid mass transfer rates in a stirred tank was investigated using a technique that involved measuring the rate of diffusion-controlled...
研究人员利用一种测量扩散控制速率的技术，研究了螺旋线圈湍流促进器对搅拌槽中液固传质速率的影响。
{"title":"Intensification of the rate of heat and mass transfer at the wall of a stirred tank reactor by integrating a helical coil turbulence promoter with the tank wall","authors":"F. Shokry, M. Abd Elfattah, M. H. Abdel-Aziz, H. A. Farag, G. H. Sedahmed, D. A. El-Gayar","doi":"10.1080/08916152.2023.2298494","DOIUrl":"https://doi.org/10.1080/08916152.2023.2298494","url":null,"abstract":"The influence of a helical coil turbulence promoter on liquid-solid mass transfer rates in a stirred tank was investigated using a technique that involved measuring the rate of diffusion-controlled...","PeriodicalId":12091,"journal":{"name":"Experimental Heat Transfer","volume":"70 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139041439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-06DOI: 10.1080/08916152.2023.2290259
Sinan Caliskan, Sertac Samed Seyitoglu
The impact of flexible flags vortex generators (FFVGs) positioned on the channel surface on friction factors and the transfer of heat were examined experimentally in this work. Within the scope of ...
实验研究了放置在通道表面的柔性旗涡发生器(FFVGs)对摩擦系数和热传递的影响。在…范围内
{"title":"Investigating the influence of flexible flags on heat transfer through experimental analysis","authors":"Sinan Caliskan, Sertac Samed Seyitoglu","doi":"10.1080/08916152.2023.2290259","DOIUrl":"https://doi.org/10.1080/08916152.2023.2290259","url":null,"abstract":"The impact of flexible flags vortex generators (FFVGs) positioned on the channel surface on friction factors and the transfer of heat were examined experimentally in this work. Within the scope of ...","PeriodicalId":12091,"journal":{"name":"Experimental Heat Transfer","volume":"40 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138544871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-03DOI: 10.1080/08916152.2023.2290268
Pradeep Kumar Singh, Jaykumar Joshi, Santosh K. Sahu
Here, the thermal characteristics of open-cell metal foam (OCMF) integrated stainless steel (SS) foil are investigated experimentally during air jet impingement using circular and elliptical nozzle...
{"title":"Thermal characteristics of metal foamed flat plate with circular and elliptical impinging jets","authors":"Pradeep Kumar Singh, Jaykumar Joshi, Santosh K. Sahu","doi":"10.1080/08916152.2023.2290268","DOIUrl":"https://doi.org/10.1080/08916152.2023.2290268","url":null,"abstract":"Here, the thermal characteristics of open-cell metal foam (OCMF) integrated stainless steel (SS) foil are investigated experimentally during air jet impingement using circular and elliptical nozzle...","PeriodicalId":12091,"journal":{"name":"Experimental Heat Transfer","volume":" 16","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138481049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-20DOI: 10.1080/08916152.2023.2282438
Arunjoy Baruah, John Mathew, Shankar Krishnan
An ultra-thin vapor chamber (1.5 mm thick) has been developed for experimental investigation. Aqueous solutions of propanol exhibiting concentration and thermal Marangoni effects are investigated a...
{"title":"Investigation of aqueous alcohol solutions as working fluids in an ultra-thin vapor chamber","authors":"Arunjoy Baruah, John Mathew, Shankar Krishnan","doi":"10.1080/08916152.2023.2282438","DOIUrl":"https://doi.org/10.1080/08916152.2023.2282438","url":null,"abstract":"An ultra-thin vapor chamber (1.5 mm thick) has been developed for experimental investigation. Aqueous solutions of propanol exhibiting concentration and thermal Marangoni effects are investigated a...","PeriodicalId":12091,"journal":{"name":"Experimental Heat Transfer","volume":"26 19","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138293850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-16DOI: 10.1080/08916152.2023.2282441
Guimin Ye, Guochong He, Yuxuan Sheng, Yuhang Chen, Qifei Jian
An ultra-thin aluminum flat heat pipes (UAFHP) with dimensions of 180 × 20 × 2 mm (length×width×thickness) were fabricated by extrusion. The thermal performance of the UAFHP was experimentally test...
采用挤压法制备了尺寸为180 × 20 × 2 mm (length×width×thickness)的超薄铝平板热管。实验测试了UAFHP的热性能。
{"title":"Thermal performance experimental study of a serrated micro-groove ultra-thin aluminum flat heat pipe under different heater locations","authors":"Guimin Ye, Guochong He, Yuxuan Sheng, Yuhang Chen, Qifei Jian","doi":"10.1080/08916152.2023.2282441","DOIUrl":"https://doi.org/10.1080/08916152.2023.2282441","url":null,"abstract":"An ultra-thin aluminum flat heat pipes (UAFHP) with dimensions of 180 × 20 × 2 mm (length×width×thickness) were fabricated by extrusion. The thermal performance of the UAFHP was experimentally test...","PeriodicalId":12091,"journal":{"name":"Experimental Heat Transfer","volume":"49 10","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138293328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-24DOI: 10.1080/08916152.2023.2273812
Jialiang Yang
ABSTRACTA thermal management method for data centers from the server level is proposed in this paper. This paper explores the high energy consumption of the server itself, proposing a principle of microchannel shape design for a cooling plate based on the principal stress lines (PSLs). Under the condition of a uniform load, the influence of the cross-sectional shape of the microchannel on the contact thermal resistance was found to be insignificant. From the analysis of cooling plate plane, the uniformity of the stress distribution of the microchannel determined the uniformity of the contact thermal resistance, which determined the heat dissipation ability. Experiments were developed to test and verify the cooling performance of the cooling plate as well as the performance differences with the microchannels along and away from the PSLs under deformation. It was concluded that compared with the conventional serpentine microchannel, the cooling performance of the cooling plate proposed in this paper was 4.5 ∘C reduction in average temperature. Furthermore, when the ultra-thin cooling plate was subjected to a uniform load distribution, the microchannel along a single PSL had the best stress distribution, that is, the contact thermal resistance had the least variation.KEYWORDS: Data centersprincipal stress linemicrochannel designheat dissipationthermal management NomenclatureTableDisplay TableDisclosure statementNo potential conflict of interest was reported by the author(s).
{"title":"Force-thermal analysis of large-area microchannel embedded cooling plate in improving thermal management of high-power density data centers","authors":"Jialiang Yang","doi":"10.1080/08916152.2023.2273812","DOIUrl":"https://doi.org/10.1080/08916152.2023.2273812","url":null,"abstract":"ABSTRACTA thermal management method for data centers from the server level is proposed in this paper. This paper explores the high energy consumption of the server itself, proposing a principle of microchannel shape design for a cooling plate based on the principal stress lines (PSLs). Under the condition of a uniform load, the influence of the cross-sectional shape of the microchannel on the contact thermal resistance was found to be insignificant. From the analysis of cooling plate plane, the uniformity of the stress distribution of the microchannel determined the uniformity of the contact thermal resistance, which determined the heat dissipation ability. Experiments were developed to test and verify the cooling performance of the cooling plate as well as the performance differences with the microchannels along and away from the PSLs under deformation. It was concluded that compared with the conventional serpentine microchannel, the cooling performance of the cooling plate proposed in this paper was 4.5 ∘C reduction in average temperature. Furthermore, when the ultra-thin cooling plate was subjected to a uniform load distribution, the microchannel along a single PSL had the best stress distribution, that is, the contact thermal resistance had the least variation.KEYWORDS: Data centersprincipal stress linemicrochannel designheat dissipationthermal management NomenclatureTableDisplay TableDisclosure statementNo potential conflict of interest was reported by the author(s).","PeriodicalId":12091,"journal":{"name":"Experimental Heat Transfer","volume":"2 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135316090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ABSTRACTThis study experimentally and numerically investigated the characteristics of heat transfer between particle flow and a cylindrical wall. The theoretical model of the heat transfer coefficient calculation was verified and modified according to experimental data. In the experimental scheme, the temperature at the axis of the cylinder under different conditions was measured to determine the effects of temperature, relative motion velocity, and cylinder diameter on the heat transfer coefficient between the particle flow and the cylindrical wall. Results revealed the benefits of using high temperature for increasing the heat transfer coefficient. The relative motion velocity between the wall and particles had no significant effect on the heat transfer coefficient. Furthermore, the change in the heat transfer coefficient was less than 10% in the range of relative velocity v = 0.03 to 0.12 m·s−1 between the wall and particles. The heat transfer coefficient almost independents on cylinder diameter under constant particle diameter conditions.KEYWORDS: Particle flowtheoretical heat transfer modeldiscrete element methodrelative motion velocitythermal radiation Disclosure statementNo potential conflict of interest was reported by the author(s).
{"title":"Experimental study on heat transfer characteristics between particle flow and wall","authors":"Zhong-Liang Fu, Ao-Yu Liu, Yong-Li Xiao, Rui-Feng Dou, You-Ping Zhang, Peng-Yuan Li, Guo-Feng Lou, Zhi Wen","doi":"10.1080/08916152.2023.2270609","DOIUrl":"https://doi.org/10.1080/08916152.2023.2270609","url":null,"abstract":"ABSTRACTThis study experimentally and numerically investigated the characteristics of heat transfer between particle flow and a cylindrical wall. The theoretical model of the heat transfer coefficient calculation was verified and modified according to experimental data. In the experimental scheme, the temperature at the axis of the cylinder under different conditions was measured to determine the effects of temperature, relative motion velocity, and cylinder diameter on the heat transfer coefficient between the particle flow and the cylindrical wall. Results revealed the benefits of using high temperature for increasing the heat transfer coefficient. The relative motion velocity between the wall and particles had no significant effect on the heat transfer coefficient. Furthermore, the change in the heat transfer coefficient was less than 10% in the range of relative velocity v = 0.03 to 0.12 m·s−1 between the wall and particles. The heat transfer coefficient almost independents on cylinder diameter under constant particle diameter conditions.KEYWORDS: Particle flowtheoretical heat transfer modeldiscrete element methodrelative motion velocitythermal radiation Disclosure statementNo potential conflict of interest was reported by the author(s).","PeriodicalId":12091,"journal":{"name":"Experimental Heat Transfer","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135883666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-16DOI: 10.1080/08916152.2023.2265208
Suvanjan Bhattacharyya, Devendra Kumar Vishwakarma, Manoj K. Soni
ABSTRACTThe effect of a novel ribbed wave tape on the augmentation of heat transfer in a solar air heater operating in a transitional flow regime is experimentally examined. Three different wave ratios are used, and the tube is uniformly heated using heat fluxes while the Reynolds number varied from 521 to 10,194. The transition for plain tube begins at 2810 and ends at 3724. For tube with ribbed wavy tapes, transition begins early and ends at higher Reynolds number than plain tube. For 2 kW/m2 of heat flux, the transition for wavy tape having wave ratio 3 begins at Reynolds number 2589 while at heat flux of 4 kW/m2, the transition begins at Reynolds number 2745. The end of transition takes place at Reynolds number 3969 and 4139 for wave ratio 3 at heat fluxes 2 and 4 kW/m2, respectively. The length of transition decreases with increase in the wave ratio at uniform heat flux. The average enhancement in Nusselt number for ribbed wavy tapes having wave ratio 3 at 4 kW/m2 heat flux was 262% and 85% for laminar and turbulent flow regime, respectively. Two empirical correlations were developed to predict the Nusselt number and friction factor for all the flow regimes.KEYWORDS: Turbulatorsribbed wavy tapestransition flow regimeNusselt numberfriction factor AcknowledgmentsI would like to sincerely acknowledge the funding provided under the Research Initiation Grant and the Additional Competitive Research Grant of BITS Pilani, Pilani Campus.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThe work was supported by the Birla Institute of Technology and Science, Pilani.
{"title":"The influence of a novel ribbed wave tape on the enhancement of heat transfer in a solar air heater operating in a transitional flow regime: an experimental study","authors":"Suvanjan Bhattacharyya, Devendra Kumar Vishwakarma, Manoj K. Soni","doi":"10.1080/08916152.2023.2265208","DOIUrl":"https://doi.org/10.1080/08916152.2023.2265208","url":null,"abstract":"ABSTRACTThe effect of a novel ribbed wave tape on the augmentation of heat transfer in a solar air heater operating in a transitional flow regime is experimentally examined. Three different wave ratios are used, and the tube is uniformly heated using heat fluxes while the Reynolds number varied from 521 to 10,194. The transition for plain tube begins at 2810 and ends at 3724. For tube with ribbed wavy tapes, transition begins early and ends at higher Reynolds number than plain tube. For 2 kW/m2 of heat flux, the transition for wavy tape having wave ratio 3 begins at Reynolds number 2589 while at heat flux of 4 kW/m2, the transition begins at Reynolds number 2745. The end of transition takes place at Reynolds number 3969 and 4139 for wave ratio 3 at heat fluxes 2 and 4 kW/m2, respectively. The length of transition decreases with increase in the wave ratio at uniform heat flux. The average enhancement in Nusselt number for ribbed wavy tapes having wave ratio 3 at 4 kW/m2 heat flux was 262% and 85% for laminar and turbulent flow regime, respectively. Two empirical correlations were developed to predict the Nusselt number and friction factor for all the flow regimes.KEYWORDS: Turbulatorsribbed wavy tapestransition flow regimeNusselt numberfriction factor AcknowledgmentsI would like to sincerely acknowledge the funding provided under the Research Initiation Grant and the Additional Competitive Research Grant of BITS Pilani, Pilani Campus.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThe work was supported by the Birla Institute of Technology and Science, Pilani.","PeriodicalId":12091,"journal":{"name":"Experimental Heat Transfer","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136113223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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