![Sample our Engineering & Technology journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5933/TOC-Subject-Sample-2021-Engineering-Tech.jpg"})
Abstract
Numerical study of a novel microjet impingement microchannel heat sink with porous media is proposed. Hydrothermal performance of the hybrid heat sink is investigated and compared with no porous media heat sink at Reynolds number 200 to 500 for several configurations of the porous slabs such as fully filled porous channel, bottom porous slab, side porous slab and slotted porous slabs in between two jets. Hybrid heat sink with fully filled porous media and slotted porous slab yielded lower wall temperatures; however, higher rise in pressure drop obtained. Furthermore, pressure drop is lowered remarkably with a reasonable rise in wall temperature in heat sink with slotted porous slabs. The changes in porous slab size affected abruptly the overall performance such as figure of merit. Thus, optimal size of the porous slabs as a function of Reynolds number is investigated for different configurations. The heat sink with 0.15 mm thick porous slabs at the base exhibited better overall performance at high Reynolds numbers, whereas at low Reynolds numbers, slotted porous slab of 0.5 mm length in the middle of impingements showed better overall performance. Generalized correlations of Nusselt numbers are developed for different cases helping optimize the heat sink design.
Additional information
Funding
Notes on contributors
Jyoti Pandey
Jyoti Pandey is a research scholar in the discipline of Mechanical Engineering at IIITDM Jabalpur. India. She received her BE degree from Jabalpur Engineering College, Jabalpur, India in 2015 and MTech degree in Thermal Engineering in 2018 from the National Institute of Technology, Raipur, India. Her research interests include micro combustion, microfluidics, and heat transfer.
Mohd. Zahid Ansari
Mohd. Zahid Ansari is an Associate Professor in the discipline of Mechanical Engineering at IIITDM Jabalpur. He received his BTech degree from the Aligarh Muslim University, India in 2001, and MTech and PhD degrees, respectively, in 2006 and 2010 from the Department of Mechanical Engineering, Inha University, South Korea. His areas of interest include MEMS, microfluidics, and heat transfer.
Afzal Husain
Afzal Husain is an Associate Professor in the Mechanical and Industrial Engineering Department at Sultan Qaboos University, Oman. He received his BE and MTech degrees in Mechanical Engineering from Aligarh Muslim University, India, and earned his PhD degree with a major in Thermodynamics and Fluid Mechanics at Inha University, South Korea. He has worked as a full-time lecturer in the Department of Mechanical Engineering at Inha University from Mar. 2010 to Aug. 2012. His research interests are thermofluids, computational fluid dynamics, microfluidics, heat transfer, and electronics cooling.