Pub Date : 2023-06-15DOI: 10.1080/08916152.2023.2224787
Laxmikant Dhruw, Hardik B. Kothadia, A. Kumar R
{"title":"Area average heat transfer from a vertical flat plate impinged by circular inclined jet","authors":"Laxmikant Dhruw, Hardik B. Kothadia, A. Kumar R","doi":"10.1080/08916152.2023.2224787","DOIUrl":"https://doi.org/10.1080/08916152.2023.2224787","url":null,"abstract":"","PeriodicalId":12091,"journal":{"name":"Experimental Heat Transfer","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47598836","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 : 2023-06-08DOI: 10.1080/08916152.2023.2222129
K. Yogi, Shankar Krishnan, S. Prabhu
{"title":"Influence of thickness of metal foam on the conduction and convection heat transfer for a flat plate with metal foam impinged by a single circular air jet","authors":"K. Yogi, Shankar Krishnan, S. Prabhu","doi":"10.1080/08916152.2023.2222129","DOIUrl":"https://doi.org/10.1080/08916152.2023.2222129","url":null,"abstract":"","PeriodicalId":12091,"journal":{"name":"Experimental Heat Transfer","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42461931","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 : 2023-06-07DOI: 10.1080/08916152.2022.2048136
Suraj Kumar, C. Balaji
ABSTRACT This paper presents an inverse methodology to estimate the parameters of the non-uniform heat generation (function estimation) within a flat plate assembly using steady-state conjugate heat transfer experiments on the flat plate assembly. Steady-state laminar conjugate forced convection experiments on a flat plate assembly are conducted on a horizontal wind tunnel to estimate the parameters of the non-uniform heat generation within flat plate assembly using the inverse methodology. Bayesian inference based Metropolis Hastings–Markov Chain Monte Carlo (MH–MCMC) algorithm and experimental temperatures are employed in the inverse methodology. The experimental temperatures are measured at convenient locations of the flat plate assembly using liquid crystal thermography. In order to accomplish the retrieval, first, steady-state experiments on only the cork material are conducted to estimate the thermal conductivity of the cork material accurately for use in the estimation of the heat generation rate so that the additional error due to uncertainty in the thermal conductivity of the cork material does not affect our final goal of estimating heat generation rate. Following this, steady-state experiments on the cork setup (consisting of a non-uniform heat generation heater and two symmetric cork plates) are conducted to ascertain the nature of heat generation of the heater using measured temperatures and fundamental rate laws. The priors are generated using coupled artificial neural network (ANN) and Levenberg–Marquardt (LM) algorithm for Bayesian inference. Using the Bayesian inference with priors, the parameters of non-uniform heat generation are then estimated in terms of the mean, maximum a posteriori with standard deviation. Finally, the simulated heat powers and temperatures are estimated with retrieved parameters of the non-uniform heat generation. These compared very well with the measured heat powers and temperatures. Finally, a recipe for solving a practical problem, in which only measured temperatures are available, is provided.
摘要本文提出了一种利用平板组件上的稳态共轭传热实验来估计平板组件内非均匀发热参数的逆方法（函数估计）。在水平风洞上对平板组件进行了稳态层流共轭强迫对流实验，用逆方法估计了平板组件内非均匀发热的参数。逆方法采用基于贝叶斯推理的Metropolis Hastings–Markov Chain Monte Carlo（MH–MCMC）算法和实验温度。使用液晶热成像在平板组件的方便位置测量实验温度。为了完成检索，首先，仅在软木材料上进行稳态实验，以准确估计软木材料的热导率，用于估计发热率，从而使软木材料热导率的不确定性导致的额外误差不会影响我们估计发热率的最终目标。在此之后，对软木装置（由一个非均匀发热加热器和两个对称软木板组成）进行稳态实验，以使用测量的温度和基本速率定律来确定加热器的发热性质。使用耦合人工神经网络（ANN）和Levenberg-Marquardt（LM）算法生成先验，用于贝叶斯推理。使用具有先验的贝叶斯推断，然后根据具有标准偏差的平均值、最大后验值来估计非均匀发热的参数。最后，利用检索到的非均匀发热参数来估计模拟的热功率和温度。这些与测得的热功率和温度进行了很好的比较。最后，提供了一种解决实际问题的方法，其中只有测量的温度可用。
{"title":"Systematic approach to estimate non-uniform heat generation rate in heat transfer problems using liquid crystal thermography and inverse methodology","authors":"Suraj Kumar, C. Balaji","doi":"10.1080/08916152.2022.2048136","DOIUrl":"https://doi.org/10.1080/08916152.2022.2048136","url":null,"abstract":"ABSTRACT This paper presents an inverse methodology to estimate the parameters of the non-uniform heat generation (function estimation) within a flat plate assembly using steady-state conjugate heat transfer experiments on the flat plate assembly. Steady-state laminar conjugate forced convection experiments on a flat plate assembly are conducted on a horizontal wind tunnel to estimate the parameters of the non-uniform heat generation within flat plate assembly using the inverse methodology. Bayesian inference based Metropolis Hastings–Markov Chain Monte Carlo (MH–MCMC) algorithm and experimental temperatures are employed in the inverse methodology. The experimental temperatures are measured at convenient locations of the flat plate assembly using liquid crystal thermography. In order to accomplish the retrieval, first, steady-state experiments on only the cork material are conducted to estimate the thermal conductivity of the cork material accurately for use in the estimation of the heat generation rate so that the additional error due to uncertainty in the thermal conductivity of the cork material does not affect our final goal of estimating heat generation rate. Following this, steady-state experiments on the cork setup (consisting of a non-uniform heat generation heater and two symmetric cork plates) are conducted to ascertain the nature of heat generation of the heater using measured temperatures and fundamental rate laws. The priors are generated using coupled artificial neural network (ANN) and Levenberg–Marquardt (LM) algorithm for Bayesian inference. Using the Bayesian inference with priors, the parameters of non-uniform heat generation are then estimated in terms of the mean, maximum a posteriori with standard deviation. Finally, the simulated heat powers and temperatures are estimated with retrieved parameters of the non-uniform heat generation. These compared very well with the measured heat powers and temperatures. Finally, a recipe for solving a practical problem, in which only measured temperatures are available, is provided.","PeriodicalId":12091,"journal":{"name":"Experimental Heat Transfer","volume":"36 1","pages":"473 - 508"},"PeriodicalIF":3.5,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46222574","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 : 2023-06-07DOI: 10.1080/08916152.2022.2046661
Ali Amiri-Gheisvandi, F. Kowsary, M. Layeghi
ABSTRACT In this paper, a numerical-experimental investigation was performed for estimation of the local convective heat transfer coefficients of a two-phase pulsating heated jet impinging a cold disk-shaped mass. By solving the energy equation, temperature history of thermocouples was obtained and then using the “temperatures measured” at locations of the sensors and the “temperatures calculated” from the numerical solution of heat equation and then minimizing the sum of squared errors by the conjugate gradient method (CGM), the convective heat transfer coefficients are estimated using the nonlinear inverse heat conduction procedure (IHCP). To compare the heat transfer characteristics of the pulsating, steady, bubbly, and liquid-only jets, the heat transfer coefficients were estimated with respect to the square pulse frequency produced by a solenoid valve in the range of and the gas volume fraction in the range of . In the case of single-phase jet, results show that flow pulsation increases Nusselt number up to at the stagnation point and for farther radial distances as compared to the steady jet. Also, for steady jet, increasing Reynolds number resulted in a increase in the stagnation point Nusselt number and a increase at farther radial distances.
{"title":"Estimation of the local convective heat transfer coefficients of low frequency two-phase pulsating impingement jets using the IHCP","authors":"Ali Amiri-Gheisvandi, F. Kowsary, M. Layeghi","doi":"10.1080/08916152.2022.2046661","DOIUrl":"https://doi.org/10.1080/08916152.2022.2046661","url":null,"abstract":"ABSTRACT In this paper, a numerical-experimental investigation was performed for estimation of the local convective heat transfer coefficients of a two-phase pulsating heated jet impinging a cold disk-shaped mass. By solving the energy equation, temperature history of thermocouples was obtained and then using the “temperatures measured” at locations of the sensors and the “temperatures calculated” from the numerical solution of heat equation and then minimizing the sum of squared errors by the conjugate gradient method (CGM), the convective heat transfer coefficients are estimated using the nonlinear inverse heat conduction procedure (IHCP). To compare the heat transfer characteristics of the pulsating, steady, bubbly, and liquid-only jets, the heat transfer coefficients were estimated with respect to the square pulse frequency produced by a solenoid valve in the range of and the gas volume fraction in the range of . In the case of single-phase jet, results show that flow pulsation increases Nusselt number up to at the stagnation point and for farther radial distances as compared to the steady jet. Also, for steady jet, increasing Reynolds number resulted in a increase in the stagnation point Nusselt number and a increase at farther radial distances.","PeriodicalId":12091,"journal":{"name":"Experimental Heat Transfer","volume":"36 1","pages":"421 - 452"},"PeriodicalIF":3.5,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46370217","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 : 2023-05-14DOI: 10.1080/08916152.2023.2212671
Huseyin Kaya, Emre Alp
ABSTRACT This research aims to experimentally investigate the thermal performance of iron oxide nanofluids having different particle shapes for multiple impinging jet flow. The heat transfer performance of nanofluids with spherical like, faced nanocube and nanowires shapes prepared by hydrothermal synthesis was investigated experimentally. The weight percentage of the nanofluids examined in this study is 0.2 wt%, and different jet-to-jet spacing (B) and jet-to-plate distance (H) values were tested for each nanofluid. The experiments were carried out for laminar flow conditions, the temperature distribution was obtained through thermocouples, and the Nu number was calculated for each case. In experiments using nanowires, it was observed that the highest Nu numbers were obtained for jet-target/diameter ratio 2 for all cases (jet spaces and Reynolds numbers). Maximum Nu number enhancement was approximately 27.3% compared to pure water for the specified conditions. This value is quite significant since it was obtained with a relatively low concentration of nanofluids. It was observed that the particle size and morphology shape significantly impact nanofluids’ performance in heat transfer.
{"title":"Experimental investigation of effect of iron oxide nanofluids with different morphology on heat transfer of multiple impinging jets","authors":"Huseyin Kaya, Emre Alp","doi":"10.1080/08916152.2023.2212671","DOIUrl":"https://doi.org/10.1080/08916152.2023.2212671","url":null,"abstract":"ABSTRACT This research aims to experimentally investigate the thermal performance of iron oxide nanofluids having different particle shapes for multiple impinging jet flow. The heat transfer performance of nanofluids with spherical like, faced nanocube and nanowires shapes prepared by hydrothermal synthesis was investigated experimentally. The weight percentage of the nanofluids examined in this study is 0.2 wt%, and different jet-to-jet spacing (B) and jet-to-plate distance (H) values were tested for each nanofluid. The experiments were carried out for laminar flow conditions, the temperature distribution was obtained through thermocouples, and the Nu number was calculated for each case. In experiments using nanowires, it was observed that the highest Nu numbers were obtained for jet-target/diameter ratio 2 for all cases (jet spaces and Reynolds numbers). Maximum Nu number enhancement was approximately 27.3% compared to pure water for the specified conditions. This value is quite significant since it was obtained with a relatively low concentration of nanofluids. It was observed that the particle size and morphology shape significantly impact nanofluids’ performance in heat transfer.","PeriodicalId":12091,"journal":{"name":"Experimental Heat Transfer","volume":"36 1","pages":"719 - 733"},"PeriodicalIF":3.5,"publicationDate":"2023-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47922726","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 : 2023-05-08DOI: 10.1080/08916152.2023.2209894
R. J. Talapati, V. Katti
{"title":"Local heat transfer characteristics of circular multiple air jet impinging on a semicircular concave surface","authors":"R. J. Talapati, V. Katti","doi":"10.1080/08916152.2023.2209894","DOIUrl":"https://doi.org/10.1080/08916152.2023.2209894","url":null,"abstract":"","PeriodicalId":12091,"journal":{"name":"Experimental Heat Transfer","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45691437","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 : 2023-05-03DOI: 10.1080/08916152.2023.2208132
H. S, S. Srinivas, A. S. Prakash
{"title":"Experimental studies of a static flow immersion cooling system for fast-charging Li-ion batteries","authors":"H. S, S. Srinivas, A. S. Prakash","doi":"10.1080/08916152.2023.2208132","DOIUrl":"https://doi.org/10.1080/08916152.2023.2208132","url":null,"abstract":"","PeriodicalId":12091,"journal":{"name":"Experimental Heat Transfer","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45862199","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 : 2023-05-03DOI: 10.1080/08916152.2023.2204338
A. Singh, Kuldeep Singh, Dushyant Singh, N. Sahoo
{"title":"Experimental and Numerical Study of the Effect of Double Row Slot Injection Locations on Film Cooling Performance of a Corrugated Surface","authors":"A. Singh, Kuldeep Singh, Dushyant Singh, N. Sahoo","doi":"10.1080/08916152.2023.2204338","DOIUrl":"https://doi.org/10.1080/08916152.2023.2204338","url":null,"abstract":"","PeriodicalId":12091,"journal":{"name":"Experimental Heat Transfer","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46281326","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 : 2023-04-30DOI: 10.1080/08916152.2023.2208111
G. Lei, Teng Li, O. Habibzadeh-Bigdarvish, Xinbao Yu
{"title":"Interface heat transfer for hydronic heating: heating tests of concrete blocks and numerical simulations","authors":"G. Lei, Teng Li, O. Habibzadeh-Bigdarvish, Xinbao Yu","doi":"10.1080/08916152.2023.2208111","DOIUrl":"https://doi.org/10.1080/08916152.2023.2208111","url":null,"abstract":"","PeriodicalId":12091,"journal":{"name":"Experimental Heat Transfer","volume":" ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45975596","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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