ملخص البحث :
This numerical study investigates mixed convection heat transfer in a twodimensional
irregularly-shaped enclosure with a nanofluid-saturated porous
medium. The enclosure has wavy vertical walls, a centered triangular block,
and a lid split into two regions moving in opposite directions. Transport
equations are solved using the finite element method under varied Darcy
(10−5 to 10−1), Reynolds (50 to 200), Richardson (0.1 to 10), amplitude (0 to
0.2), and nanoparticle volume fraction (0 to 0.1) numbers. Results demonstrate
the combined effects of forced convection from lid motion and natural
convection from temperature differences significantly enhance heat transfer.
The wavy walls induce secondary flows and periodic disruption of thermal
boundary layers. Increasing Darcy number enables deeper penetration into
the porous block. Copper nanoparticles incrementally improve conductive
heat transfer. Richardson number effects are more prominent at higher
Reynolds numbers as buoyancy forces influence vertical convection. This
study provides novel insights into synergistically utilizing wavy geometries,
nanofluids, porous media, and active pumping for optimizing heat transfer in
irregular enclosures for electronics cooling and thermal management.
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سنة النشر : 2024
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تصنيف البحث : scopus
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