Impact of Linear Heating Profiles on Nanofluidic Convection in Enclosure

Abstract

ABSTRACTThe present study demonstrates the influence of non-uniform heating on the nanofluidic thermal convection in an enclosure by keeping the mean temperature of heating constant. The non-uniform heating is applied by varying the slope of the linear temperature profile from 0° to 60° at an interval of 15°. The investigation is executed numerically following the finite volume discretization technique. Two different cases are taken into consideration: Case A for linearly increasing temperatures, and Case B for linearly decreasing temperatures. The flow structures and heat transfer characteristics are studied for the Rayleigh number from 103 to 106 and the copper-water nanoparticle concentrations from 0 to 0.04, utilizing the streamlines, isotherms, and heatlines. The results reveal that the mean Nusselt number monotonically increases with a rise in slope for all linearly increasing temperature profiles. For the decreasing profiles (Case B), the Nusselt number decreases with a rise in the temperature slope for the lower Rayleigh number (103 and 104); however, a marginal increment is observed at the maximum profile angle for the higher Rayleigh number (105 and 106). This study provides findings helpful for designing thermal devices with the efficient utilization of heating sources.DisclaimerAs a service to authors and researchers we are providing this version of an accepted manuscript (AM). Copyediting, typesetting, and review of the resulting proofs will be undertaken on this manuscript before final publication of the Version of Record (VoR). During production and pre-press, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal relate to these versions also. Additional informationNotes on contributorsAbhinav Saha Abhinav Saha is a Ph.D. student at Jadavpur University, Kolkata, India. He received his Master’s in Mechanical Engineering in 2012. His research includes computational heat transfer, buoyancy-driven flow of nanofluids, and transport in porous media. His research papers on thermal engineering have been published in international journals and conference proceedings.Nirmalendu Biswas Nirmalendu Biswas graduated from Jadavpur University and did Master’s in Mechanical Engineering from Jadavpur University. He received his Ph.D. in Engineering from Jadavpur University, Kolkata in 2016. He has more than ten years of industrial experience. Presently he is an Assistant Professor in the Department of Power Engineering, Jadavpur University, Kolkata, India since 2019. His research interests include heat transfer, microfluidics, multiphase-flow, energy storage, phase-change material, and bio-fluid mechanics. He has published a number of research papers in international journals and conference proceedings. He is an INAE fellow. He is a life member of ISHMT and IEI.Nirmal K. Manna Nirmal K. Manna is a Professor in the Department of Mechanical Engineering at Jadavpur University, Kolkata, India. He completed his Ph.D. (Mechanical Engineering) from Jadavpur University in 2005, and his Masters in Heat Power from the Indian Institute of Engineering Science and Technology (formerly known as Bengal Engineering College Deemed University) in 1996. He has 4 years of industrial experience. His research interests include the development of CFD code on single- and multi-phase flows, bio-fluid mechanics, free and forced convection, spool valve of HCS, FCI, and premixing. He has published a number of research papers in international journals and conference proceedings.Koushik Ghosh Koushik Ghosh is a Professor in the Department of Mechanical Engineering at Jadavpur University, India. He received his Masters degree from Jadavpur University in 1997 and worked at Bhabha Atomic Research Centre (BARC), India, during 1997-2002. He did his Ph.D. (2007) at Jadavpur University. He worked as a Post-Doctoral Researcher in IRSN, France (2009-2010). His research interests include heat transfer, boiling and condensation, multiphase flow, and transport in porous media. He has published about 50 research papers in various international journals in the area of thermal engineering. He has also published several book chapters and conference papers.