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主页 旧刊 有关人员 未来大会 American Society of Thermal and Fluids Engineering

ISSN 在线: 2379-1748

ISBN 打印: 978-1-56700-517-2 (Flash drive)

5-6th Thermal and Fluids Engineering Conference (TFEC)
May, 26–28, 2021 , Virtual

NUMERICAL INVESTIGATION ON CONFINED IMPINGING SLOT JETS WITH NANOFLUIDS IN POROUS MEDIA

Get access pages 1067-1076
DOI: 10.1615/TFEC2021.hte.031894

摘要

In this paper a numerical study on mixed convection in confined slot jets impinging on a porous media is carried out. Pure water or Al2O3/water based nanofluids are employed as working fluids; a single-phase model approach has been applied to evaluate their properties. A two-dimensional domain is analyzed and different Peclet and Rayleigh numbers are considered. The local thermal non-equilibrium energy condition is assumed to accomplish two-dimensional simulations on the system. The examined aluminum foams are characterized by distinct porosity (ε), from 0.90 to about 0.97, for different values of pores per inch (PPI), equal to 5, 10, 20 and 40. The particle volume concentrations range from 0% to 4% and the particle diameter is equal to 30 nm. The target surface is heated by a constant temperature value, calculated according to the value of Rayleigh number. The distance of the target surface is five times greater than the slot jet width. The results show that the convective heat transfer coefficients increase with increasing of values of Peclet number and nanoparticle concentration. Furthermore, the heat transfer coefficient shows a different behavior at varying porosity for different Peclet and Rayleigh numbers.
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