Heat and Mass Transfer最新文献_第4页

Experimental study and Large Eddy Simulation of slot jet impingement cooling from heated cylinder placed on flat plate 放置在平板上的受热圆柱体的槽形射流撞击冷却实验研究与大涡流模拟

IF 2.2 4区工程技术

Heat and Mass Transfer Pub Date : 2024-06-11 DOI: 10.1007/s00231-024-03485-w

Ketan Atulkumar Ganatra, Dushyant Singh, Achintya Mukhopadhyay

引用次数: 0

A comprehensive study of air jet impingement on curved surfaces: experimental analysis and correlation development 曲面上的气流冲击综合研究：实验分析与相关性发展

IF 2.2 4区工程技术

Heat and Mass Transfer Pub Date : 2024-06-07 DOI: 10.1007/s00231-024-03490-z

Sana Ansari, Laxmikant Dhruw, Hardik B. Kothadia, Arun Kumar R

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Effect of nanofluid on the performance of humidification-dehumidification (HDH) desalination system 纳米流体对加湿-除湿（HDH）海水淡化系统性能的影响

IF 2.2 4区工程技术

Heat and Mass Transfer Pub Date : 2024-06-06 DOI: 10.1007/s00231-024-03486-9

L. Shouman, D. A. Fadel, S. A. Samad, Mohamed Abdelaziz

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Improved liver cancer hyperthermia treatment and optimized microwave antenna power with magnetic nanoparticles 利用磁性纳米粒子改进肝癌热疗并优化微波天线功率

IF 2.2 4区工程技术

Heat and Mass Transfer Pub Date : 2024-06-05 DOI: 10.1007/s00231-024-03489-6

Soheil S. Fakhradini, Mehdi Mosharaf-Dehkordi, Hossein Ahmadikia

{"title":"Improved liver cancer hyperthermia treatment and optimized microwave antenna power with magnetic nanoparticles","authors":"Soheil S. Fakhradini, Mehdi Mosharaf-Dehkordi, Hossein Ahmadikia","doi":"10.1007/s00231-024-03489-6","DOIUrl":"https://doi.org/10.1007/s00231-024-03489-6","url":null,"abstract":"One of the most effective parameters in the thermal treatment of liver cancer by microwave heating method is the changes in the input power to the antenna. This study aims to numerically investigate the effects of the change in the input power to the microwave antenna in the presence of magnetic nanoparticles using the finite element method in liver tumors. Also, the importance of the type of nanoparticles, treatment time and side effects were investigated. According to the results, after the injection of maghemite nanoparticles, the purification time is 7.35 s at a power of 10 W and reaches 6.1 s when the power is increased to 100 W. Also, the ratio of the destroyed healthy volume of the tissue to the tumor volume is less than 20% in the mentioned powers, and the treatment can be considered independent of the power. After the injection of magnetite and FccFePt nanoparticles at a power of 10 W, the treatment time was calculated as 176 s and 295 s, respectively, and with the increase of the input power, the reduction of the treatment time was observed. So that the treatment time was reduced to 58 s and 74 s, respectively, at 100 W. In terms of side effects, for the mentioned nanoparticles, 4.89 and 8.93 times the volume of the tumor with a power of 10 W and when the power reaches 100 W, 4.05 and 5.6 times the volume of the tumor is destroyed from the healthy tissue, respectively. However, the lowest amount of healthy tissue destruction in these two nanofluids occurs at moderate powers—60 W and 50 W, respectively—so the dependence of treatment time and side effects on input power was observed.","PeriodicalId":12908,"journal":{"name":"Heat and Mass Transfer","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141258453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation for the use of nanofluids as a coolant in a vehicle radiator 关于在汽车散热器中使用纳米流体作为冷却剂的研究

IF 2.2 4区工程技术

Heat and Mass Transfer Pub Date : 2024-05-29 DOI: 10.1007/s00231-024-03487-8

Amr M. Hassaan

{"title":"Investigation for the use of nanofluids as a coolant in a vehicle radiator","authors":"Amr M. Hassaan","doi":"10.1007/s00231-024-03487-8","DOIUrl":"https://doi.org/10.1007/s00231-024-03487-8","url":null,"abstract":"A vehicle’s cooling cycle plays a major role in preventing overheating of the engine or excessive operating temperatures. The engine will run as effectively as possible under all circumstances if the operating temperature is set to the optimal value. Also, maintaining the characteristics of the lubricant that separates the surfaces that contact one another. Enhancing the radiator’s thermal performance is one of the options being researched by scientists right now in order to boost the cooling cycle’s effectiveness. To enhance heat transmission, nanofluids are now often used and are the topic of research. In an experimental study, the performance of using multi-wall carbon nanotubes (MWCNTs) with varied concentrations of nanofluid as operating fluids in an automotive radiator with louvered fins and flat tubes (Honda Civic 2005) was examined. Nanofluids were created using five volumetric concentrations of nanomaterials (0.2%, 0.4%, 0.8%, 1%, and 1.6%). The flow inside the tube had a Reynolds number that fluctuated from 11,000 to 58,000. It is possible to calculate the Nusselt number, pressure drop, friction factor, heat transfer coefficient, and heat transfer rate by measuring the variables. Experimental results show that when MWCNTs concentration and flowrate increase, the heat transfer rate and heat transfer coefficient also increase. The volume concentration of the nanoparticles is what has caused the Nusselt number value to rise by 13.72% in comparison to pure water. For estimating the Nusselt number, a correlation between the Reynolds number and MWCNTs volume concentration is provided.","PeriodicalId":12908,"journal":{"name":"Heat and Mass Transfer","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141173095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CubeSat thermal analysis: evaluating models for thermal contact conductance 立方体卫星热分析：评估热接触传导模型

IF 2.2 4区工程技术

Heat and Mass Transfer Pub Date : 2024-05-29 DOI: 10.1007/s00231-024-03482-z

Narimane Blanchete, Abdellah Bah

引用次数: 0

Numerical simulation on the heat sink with interrupted microchannels regarding of heat transfer enhancement 带间断微通道的散热器的传热增强数值模拟

IF 2.2 4区工程技术

Heat and Mass Transfer Pub Date : 2024-05-16 DOI: 10.1007/s00231-024-03484-x

Qing-wen Li, X. Shang, Qun Cao, Zheng Cui, Wei Shao

引用次数: 0

Correction to: New water-stainless steel rod-plate heat pipe: model and experiments 更正为：新型水-不锈钢棒-板热管：模型与实验

IF 2.2 4区工程技术

Heat and Mass Transfer Pub Date : 2024-05-09 DOI: 10.1007/s00231-024-03483-y

Elvis Falcão de AraújoJuan, J. P. F. Mera, Luis H. R. Cisterna, Márcia Barbosa Henriques Mantelli

引用次数: 0

The effect of high values of relative surface roughness on heat transfer and pressure drop characteristics in the laminar, transitional, quasi-turbulent and turbulent flow regimes 高相对表面粗糙度值对层流、过渡流、准湍流和湍流中传热和压降特性的影响

IF 2.2 4区工程技术

Heat and Mass Transfer Pub Date : 2024-05-04 DOI: 10.1007/s00231-024-03472-1

Marilize Everts, Faiyaad Mahomed

{"title":"The effect of high values of relative surface roughness on heat transfer and pressure drop characteristics in the laminar, transitional, quasi-turbulent and turbulent flow regimes","authors":"Marilize Everts, Faiyaad Mahomed","doi":"10.1007/s00231-024-03472-1","DOIUrl":"https://doi.org/10.1007/s00231-024-03472-1","url":null,"abstract":"This study investigated the effect of large values of relative surface roughness on the heat transfer and pressure drop characteristics using simultaneously measured heat transfer and pressure drop data. Experiments were conducted using a horizontal circular tube with a base inner diameter of 5 mm and length of 4 m. One smooth and two rough tubes, with relative roughnesses of 0.04 and 0.11, were tested at different constant heat fluxes between Reynolds numbers of 100 and 8 500. Water was used as the test fluid and the Prandtl number varied between 3 and 7. Contrary to the trend in the Moody Chart, a significant increase in laminar friction factors with increasing surface roughness was observed. Both the friction factors and Nusselt numbers as functions of Reynolds number showed a clear upward and leftward shift with increasing surface roughness across the different flow regimes. Furthermore, the boundaries between the flow regimes were the same for the pressure drop and heat transfer results. The width of the transitional flow regime was narrower for rough tubes and had a differing trend. The quasi-turbulent and turbulent flow regimes occurred at lower Reynolds numbers for increasing roughness. When investigating the relationship between heat transfer and pressure drop, it was found that an increase in surface roughness favoured heat transfer in the quasi-turbulent flow regime. This is useful for rough tubes as the quasi-turbulent flow regime onsets early with regards to the Reynolds number in tubes with large roughnesses.","PeriodicalId":12908,"journal":{"name":"Heat and Mass Transfer","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140885564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling the performance of a single rotor row in a turbomolecular pump using the TPMC method: effects of operational and geometric variables 使用 TPMC 方法模拟涡轮分子泵中单排转子的性能：运行和几何变量的影响

IF 2.2 4区工程技术

Heat and Mass Transfer Pub Date : 2024-05-03 DOI: 10.1007/s00231-024-03477-w

Maryam Hosseinzadeh Sereshgi, Reza Ebrahimi

{"title":"Modeling the performance of a single rotor row in a turbomolecular pump using the TPMC method: effects of operational and geometric variables","authors":"Maryam Hosseinzadeh Sereshgi, Reza Ebrahimi","doi":"10.1007/s00231-024-03477-w","DOIUrl":"https://doi.org/10.1007/s00231-024-03477-w","url":null,"abstract":"Turbo-molecular pumps are widely used in industries and scientific studies in areas such as semiconductors and sedimentation. In; such pumps, the influence of the geometric characteristics and operating conditions on performance is of interest to researchers. A single-row rotor of a turbo-molecular pump was simulated, and the test particle Monte Carlo method was used to investigate the effects of blade spacing, angle, number, and length; as well as operating conditions on performance. The maximum compression ratio and pumping speed were calculated. The pump’s performance was studied for 12, 24, 36, and 48 blades in a single-row rotor at angles of 15, 20, and 30 degrees with a clearance of 0.015. We were increasing the gap from 0.015 to 0.025 and 0.035 examined across rotors with 12 to 48 blades, a blade speed ratio of 3.5, and a blade angle of 15 degrees. To validate the results, the numerical values obtained for 36 blades, 30-degree blade angle, and 0.015 clearance were compared to available experimental results, yielding good agreement. The results of this simulation are intended to cover cases of interest for design calculations.","PeriodicalId":12908,"journal":{"name":"Heat and Mass Transfer","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140885629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0