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Turbulent natural convection in an electronic enclosure having finite thickness heat-conducting walls at local heating at the bottom of the cavity provided that convective- radiative heat exchange with environment on one of the external borders has been numerically studied. Mathematical simulation has been carried out in terms of the dimensionless Reynolds averaged Navier Stokes (RANS) equations in...
A steady-state analysis of heat transfer process for a micro thermal flow sensor is presented. A conjugate forced convection-conduction heat transfer model is built to describe the heat transfer process of the micro thermal flow sensor, the heat conduction in substrate and heat convection in fluid are both taken into account. A numerical solution involved with the finite difference scheme is developed...
This study examines numerically details of the flow and temperature fields of heat sinks with short plate fins cooled by impinging jet. The main focus is on the effect of fin shapes on the heat sink performance. Conjugate heat transfer between airflow convection and conduction inside the fin and base is considered. Three different shapes under study are rectangular, round-headed and elliptic, while...
In this paper we present the conjugate heat transfer analysis in a 167 kVA dry type transformer using the parallel version of the CFD code Fluent 6.0. The RNG kappa-epsiv model is proposed to compute the turbulent aspect of the convective airflow inside the transformer metal tank, for ANAN (air natural air natural) cooling conditions. An experimental approach was used to assess Joule losses in the...
Laminar natural convection in an enclosed cavity with differentially heated walls and having fins on the cold wall is investigated. The effect of the number of fins and their position on the cold wall on heat transfer characteristics is analyzed. Governing equations of continuity, momentum and energy are solved using SIMPLER algorithm. A fuzzy controller with pre-defined set of fuzzy rules is implemented...
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