Article
Thermodynamics
Kamlesh Mehta, Nirvesh Mehta, Vivek Patel
Summary: This study investigated the effects of operational and geometrical parameters on the thermal performance of CLFP-OHP. It was found that the thermal resistance was strongly dependent on these parameters, with acetone showing the best performance at a charge ratio of 60%, in vertical orientation, and square channels. The lowest thermal resistance achieved was 0.39 degrees C/W at 100 W, with a thermal conductivity of 3205 W/m degrees C.
EXPERIMENTAL HEAT TRANSFER
(2021)
Article
Thermodynamics
Kimihide Odagiri, Kieran Wolk, Stefano Cappucci, Stefano Morellina, Scott Roberts, Andre Pate, Benjamin Furst, Eric Sunada, Takuro Daimaru
Summary: This paper presents a three-dimensional heat transfer analysis of a flat-plate oscillating heat pipe (OHP) and reveals the combined effect of thermo-hydraulic phenomena and thermal diffusion in the OHP structure. Surface roughness and liquid film thickness in the channel were found to have an impact on the operating temperature distribution.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Juan Zhao, Mingsheng Du, Zhen Zhang, Xiang Ling
Summary: With the development of electronic technology, a thermal management strategy combining flat-plate heat pipe (FPHP) and spray cooling was designed to improve heat dissipation performance. The best performance was achieved at a heat flux of 20-40 W/cm(2), with the lowest thermal resistance and highest thermal conductivity.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Xi Chen, Shengkai Chen, Ziwen Zhang, Dongke Sun, Xiangdong Liu
Summary: The study investigates the thermal performance of a novel tandem dual-channel flat-plate oscillating heat pipe under nonuniform heating conditions. It was found that nonuniform heating can improve thermohydrodynamic performance at low heat loads but worsen it at high heat loads. Concentrating more heat to overcome negative effects is more beneficial than amplifying positive effects for overall thermal performance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Ning Qian, Fan Jiang, Marco Marengo, Yucan Fu, Jiuhua Xu
Summary: Grinding of difficult-to-machining materials generates excessive heat. Radial-rotating oscillating heat pipe (RR-OHP) can enhance heat transfer and control the temperature during grinding. Experimental results demonstrate that RR-OHP improves heat transfer efficiency in grinding process significantly.
APPLIED THERMAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Yunzhi Ling, Xiaozhao Li, Xiaosong Zhang, Zhan Liu, Peng Zhao
Summary: An experimental study was conducted to investigate the thermal performance of an oscillating heat pipe (OHP) for thermal management of electronic devices. The results showed that as the heat input increased, the average thermal resistance decreased and the stable evaporating and condensing temperatures increased. An empirical correlation was proposed to evaluate the thermal resistance of the OHP system based on the derived theoretical analysis.
APPLIED SCIENCES-BASEL
(2023)
Article
Thermodynamics
Larissa Krambeck, Kelvin G. Domiciano, Luis A. Betancur-Arboleda, Marcia B. H. Mantelli
Summary: This article introduces an improved flat plate pulsating heat pipe with channel modification in the evaporator region, resulting in ultra sharp lateral grooves, to enhance heat transfer performance. Experimental results show that the ultra sharp grooves, acting as artificial nucleation sites and capillary medium, can delay dry-out and make the device suitable for application in microgravity environments.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Jian Qu, Fengbo Guan, Yaojie Lv, Yalin Wang
Summary: The experimental study showed that micro-grooved OHP can significantly enhance the allowable maximum input heat flux and prevent dry-out. The thermal conductivity of OHP varies under different filling ratios. This study provides a promising option for thermal management of high-density power devices.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Ziyun Wang, Jia Zhu, Moxin Wang, Qinglong Gao
Summary: Using renewable energy, especially solar energy, is crucial for achieving a low-carbon society. This study proposes a new building heating ceiling system that combines flat-plate heat pipes (FHP) and phase change materials (PCM) to enhance the efficiency of PCM-based systems. Experimental results show that increasing heating power and bending angle can improve the heat transfer efficiency of the FHP and the phase change heat storage system.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Analytical
Chao Chang, Yaoguang Yang, Lilin Pei, Zhaoyang Han, Xiu Xiao, Yulong Ji
Summary: With the rapid development of electronics, thermal management is becoming increasingly important. This study used metal 3D printing technology to develop an aluminum flat-plate oscillating heat pipe (OHP) with high-precision molding and complex inner channels. Experimental results showed that the 3D-printed OHP with a 60% filling ratio had better heat transfer performance and lower thermal resistance, and it could work properly in different operation modes.
Article
Thermodynamics
Xiaonan Liao, Qifei Jian, Shuaifei Zu, Deqiang Li, Zhe Huang
Summary: The study showed that the thin thickness of UFHP leads to the liquid bridge phenomenon, hindering the vapor flow. Power input is a key factor influencing the thermal resistance of UFHP, with continuous vapor flow greatly improving heat transfer performance.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Mohamed Abdelnabi, Dan Ewing, Chan Y. Ching
Summary: Experiments were conducted to study the performance of a two-layer oscillating heat pipe under different operating conditions. The results showed that the heating position had an impact on the thermal conductance of the heat spreading plate, and the operating parameters affected the heat transfer in the oscillating heat pipe.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Thermodynamics
Koji Fumoto, Keiko Ishii
Summary: A study found that highly efficient heat transport can be achieved when the filling ratio of a pulsating heat pipe (PHP) is extremely low. The experiment used a flat aluminum tube with 28 straight channels and obtained a minimum thermal resistance of 0.021 K/W and a temperature difference of less than 1.0 K between the evaporating and condensing sections.
APPLIED THERMAL ENGINEERING
(2023)
Article
Energy & Fuels
Zeyu Wang, Yanhua Diao, Yaohua Zhao, Chuanqi Chen, Tengyue Wang, Lin Liang
Summary: This study conducted an experiment to investigate the influence of inclination angle on the coupled heat transfer process between a heat pipe and phase change material (PCM) under constant heat flux conditions. The results showed that decreasing the inclination angle can enhance heat transfer on the PCM side but also prolong the melting time of the PCM. The study also found that the change in inclination angle affects the thermal conductivity of the flat heat pipe.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
M. Muneeshwaran, Yun-Jin Lee, Chi-Chuan Wang
Summary: This study aimed to improve the heat transfer performance of heat sinks with vapor chamber heat spreader by developing parallelogram fins integrated with heat pipes. Results showed significant reduction in thermal resistance and chip temperature with the proposed design.
APPLIED THERMAL ENGINEERING
(2022)
Review
Materials Science, Multidisciplinary
Devang Sejani, Wenya Li, Vivek Patel
Summary: The invention of friction stir welding revolutionized solid-state materials joining process for lightweight constructions. Stationary shoulder friction stir welding (SSFSW) is an important variant derived from conventional FSW, eliminating key issues and improving material properties. This review critically summarizes the research progress on SSFSW, provides detailed comparisons with other variants, and emphasizes on commercialization and future challenges.
CRITICAL REVIEWS IN SOLID STATE AND MATERIALS SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Vivek Patel, Wenya Li, Joel Andersson, Na Li
Summary: This study focuses on the refinement of microstructure and evaluation of corrosion behavior in thick AZ31B magnesium alloy using stationary shoulder friction stir processing (SSFSP). The results show that the use of stationary shoulder reduces heat input and temperature gradient in the stir zone, leading to improved corrosion resistance of the alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
William P. Bates, Vivek Patel, Harikrishna Rana, Joel Andersson, Jeroen De Backer, Mattias Igestrand, Livan Fratini
Summary: The present study aims to enhance the mechanical properties of hypereutectic aluminium-silicon castings by modifying the microstructure and reducing defects through friction stir processing (FSP). By altering the tool revolution and the number of FSP passes, the study identified the specimen with the highest number of passes to have the most uniform properties, resulting from reduced casting porosities and refined silicon particle distribution in the friction stir processed zone.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Vivek Patel, Jeroen De Backer, Henrik Hindsefelt, Mattias Igestrand, Saeed Azimi, Joel Andersson, Jorgen Sall
Summary: This study aims to achieve high welding speed in friction stir welding of lightweight battery trays in the electric vehicle industry. It reports the use of high-speed friction stir welding (HSFSW) up to 4.0 m min(-1) in AA6063-T6 alloys. The HSFSW joints exhibit a unique hardness profile and good joint strength at high speeds.
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING
(2022)
Review
Materials Science, Multidisciplinary
Manu Srivastava, Sandeep Rathee, Vivek Patel, Atul Kumar, Praveennath G. Koppad
Summary: Tremendous growth has been witnessed in the field of additive manufacturing (AM) technology, offering a wide range of applications. Due to the differences between each AM technique, new research areas emerge and demand attention. AM materials play a crucial role in determining the properties of fabricated parts.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Jay Vora, Heet Parmar, Rakesh Chaudhari, Sakshum Khanna, Mikesh Doshi, Vivek Patel
Summary: In this study, a multi-layered structure was fabricated using the GMAW-based WAAM process on SS316L, and its microstructure, macrostructure, and mechanical properties were examined. The results showed that the structure produced by this process meets industrial standards and exhibits good ductility and strength.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Rakesh Chaudhari, Nipun Parikh, Sakshum Khanna, Jay Vora, Vivek Patel
Summary: Wire-arc additive manufacturing (WAAM) is a promising technology for the fabrication of multi-walled components. This study employed Gas metal arc welding (GMAW) based WAAM to manufacture a 1.25Cr-0.5Mo multi-walled component. The fabricated structure showed seamless fusion and no disbonding. Microstructure investigations revealed different grain structures in different zones of the component. Mechanical property tests, including microhardness, tensile, and impact tests, demonstrated that the fabricated component had suitable mechanical properties. Comparisons with the results of metal-cored wires confirmed the high quality of the obtained component. The findings suggest that GMAWAM is suitable for the fabrication of multi-walled structures for various industrial applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Bhavesh Chaudhary, Neelesh Kumar Jain, Jayaprakash Murugesan, Vivek Patel
Summary: This paper presents a preliminary study on the multi-layer deposition of aerospace grade Al 6061 alloy using a novel friction stir powder additive manufacturing process. The deposition temperature was controlled using a closed-loop temperature-controlled system to minimize thermal gradients. A tool with circumferential and radial grooves and continuous external heating was used to facilitate a smooth three-layer deposition with a deposition efficiency of 60% and a maximum deposition temperature of 417 degrees C. The higher temperature at the deposition zone improved material flowability and deposition quality. The microstructure of the multi-layer deposition consisted of fine sub-grains, with a uniform distribution of major alloying elements. Phase analysis revealed the presence of Al and Mg2Si hardening precipitates. The tensile strength and microhardness were similar to those of commercially available wrought AA6061-T4 alloy, and the material exhibited ductility with 16% elongation. The presented process offers a viable alternative to fusion-based additive manufacturing processes for the multi-layer deposition of aerospace grade and other difficult-to-manufacture lightweight alloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Correction
Materials Science, Multidisciplinary
William P. Bates, Vivek Patel, Harikrishna Rana, Joel Andersson, Jeroen De Backer, Mattias Igestrand, Livan Fratini
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Engineering, Mechanical
Kamlesh Mehta, Vivek Patel, Nirvesh Mehta, Amarish Badgujur
Summary: This study proposes a new configuration of minichannels to improve the thermal performance of conventional aluminum heat sink for electronic component thermal management. Experimental results show that the minichannel heat sink is more effective than the conventional method, providing better thermal management.
IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY-TRANSACTIONS OF MECHANICAL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Mahesh Patel, Bhavesh Chaudhary, Jayaprakash Murugesan, Neelesh Kumar Jain, Vivek Patel
Summary: Friction stir processing (FSP) was used to fabricate hybrid aluminium matrix composite (HAMC) with different passes, and its effects on tensile properties, residual stresses, and fatigue performance were studied. The results showed that more passes of FSP significantly improved the tensile properties, residual stresses, and fatigue life of HAMCs.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Bhavesh Chaudhary, Neelesh Kumar Jain, Jayaprakash Murugesan, Vivek Patel
Summary: This paper focuses on the solid state multi-layer manufacturing of Al 6061 alloy by friction stir powder additive manufacturing (FSPAM) process and how it enhances the microstructure and mechanical properties of the alloy. The study shows that continuous dynamic recrystallization and reduced thermal gradient contribute to a homogeneous microstructure with fine grains, as well as lower porosity and the presence of compressive residual stresses.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Rakesh Chaudhari, Rushikesh Bhatt, Vatsal Vaghasia, Bansi D. Raja, Vivek K. Patel, Sakshum Khanna, Jay Vora, Vivek V. Patel
Summary: In this study, a Gas metal arc welding (GMAW) based Wire-arc additive manufacturing (WAAM) process was used to fabricate multi-layered structures and investigate their mechanical properties on metal core wire. Through experiments and statistical analysis, the feasibility of non-linear regression models was validated. The optimized parametric settings resulted in the successful fabrication of a uniform multi-layered structure with favorable mechanical properties.
JOURNAL OF ADVANCED JOINING PROCESSES
(2023)
Article
Materials Science, Multidisciplinary
Vivek Patel, Hendrik Wouters, Amir Baghdadchi, Jeroen De Backer, Mattias Igestrand, Saeed Azimi, Joel Andersson
Summary: The present study focuses on developing lightweight assembly of two different aluminium alloys for battery frame assembly in BEV. Stationary shoulder friction stir welding (SSFSW) was employed to produce defect-free welds with smooth surface finish. EBSD analysis revealed two groups of grains in the stir zone, and the grain size significantly decreased compared to both alloys. Tensile-shear test results showed similar tensile strength with increasing welding speed. The findings provide valuable insights for optimizing welding parameters and improving the overall quality and productivity of the SSFSW process for battery pack assembly in BEV.
JOURNAL OF ADVANCED JOINING PROCESSES
(2023)
