An investigation on exergy in a wavy wall microchannel heat sink by using various nanoparticles in fluid flow: two-phase numerical study

In the present paper, a wavy wall microchannel heatsink (WWMCHS) with wavy walls is simulated using ANSYS FLUENT software. Heat sink (H/S) is made of aluminum and is designed to cool an electronic component. Water, alumina/water and copper oxide/water nanofluids (N/F) are used as cooling fluid in th...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2021-08, Vol.145 (3), p.1599-1610
Main Authors: Saleem, S., Heidarshenas, Behzad
Format: Article
Language:English
Subjects:
Algorithms
Aluminum compounds
Aluminum oxide
Analysis
Analytical Chemistry
CAD
Chemistry
Chemistry and Materials Science
Computational fluid dynamics
Computer aided design
Control methods
Copper oxides
Electronic components
Electronic components industry
Exergy
Fluid flow
Heat sinks
Inorganic Chemistry
Investigations
Laws, regulations and rules
Measurement Science and Instrumentation
Microchannels
Nanofluids
Nanoparticles
Physical Chemistry
Polymer Sciences
Simulation
Two phase flow
Volume controls
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Summary:In the present paper, a wavy wall microchannel heatsink (WWMCHS) with wavy walls is simulated using ANSYS FLUENT software. Heat sink (H/S) is made of aluminum and is designed to cool an electronic component. Water, alumina/water and copper oxide/water nanofluids (N/F) are used as cooling fluid in the H/S. The volume percentage of nanoparticles varies from 0 to 2%. A two-phase mixture method is employed to simulate N/F flow. In this paper, the main purpose of exergy analysis includes out exergy, gain exergy and loss exergy along with the analysis of the efficiency of the first and second laws of thermodynamics. The main innovation of the article is the study of exergy on the new geometry of H/S. The SIMPLE algorithm and the volume control method are used for the simulations. Results showed that using the N/F decreases the maximum temperature. By adding 2% alumina and copper oxide to water in Reynolds 500, the maximum temperature is reduced by 2.55 °C and 2.38 °C, respectively. Using N/Fs instead of water, especially CuO /water, reduces the loss exergy amount. For alumina oxide, this reduction is 1.84 W for Re = 1500 and 2.61 W for copper oxide.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-021-10771-w