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Boiling heat transfer in vertical rectangular mini-channels with a width of 2 mm and a length of 390 mm is studied in this paper. The courses of bubbles generation, growth and departure were numerically simulated, the influence of the wall overheating and the movement of bubble bottom micro-layer is analyzed and compared with the experimental datum. All the calculation conducted takes the gravity,...
This paper provides a brief insight into the advantages of utilizing nanofluids (nano-sized particles in fluid) in replacement of conventional coolant materials. Nanofluids have been recognized as an alternative coolant material due to the heat transfer enhancement thus reducing the required coolant power. This paper presents numerical simulations of convective heat transfer under laminar flow conditions...
Incompressible flow around a pair of circular cylinders in various staggered arrangements with heated upstream cylinder is investigated in this study. Three dimensional direct numerical simulation (DNS) has been performed with spatial discretization based on the spectral/hp element method with the Reynolds numbers of 200 and the Richardson numbers are varied from 0.05 to 2.0. The longitudinal separation...
In this study, confinement-driven boiling enhancement trends and experimental data from narrow parallel plate channels are presented and analyzed via comparison with numerical simulations of buoyancy-driven boiling and two phase flow using the commercially-available Fluent CFD software package. An Euler-Euler multiphase approach, known as the volume of fluid (VOF) method, is employed, as bubbles sizes...
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