Conjugate mixed convection with discrete heat sources in a rectangular channel with surface radiation
Nitish Kumar Chaurasia,S Gedupudi,S P Venkateshan +2 more
- Vol. 745, Iss: 3, pp 032031
TLDR
In this article, the effect of surface radiation on mixed convection and conjugate convection in a channel with discrete heat sources was investigated and the parameters considered for this study are thermal conductivity of PCB (printed circuit board), Reynolds number, position of heat sources and emissivity of surface (e.g., the inner surfaces of the channel are kept constant while those of the heat sources are varied).Abstract:
Mixed convection is seen in high power devices where natural convection alone is not enough. At high temperatures radiation also contributes considerably. This work is concerned with the effect of surface radiation on mixed convection and conjugate convection in a channel with discrete heat sources. Flow is laminar and the parameters considered for this study are thermal conductivity of PCB (printed circuit board), Reynolds number, position of heat sources and emissivity of surface (emissivity of the inner surfaces of the channel are kept constant while those of the heat sources is varied). Constant fluid properties with Pr = 0.707 with Boussinesq approximation is considered. All numerical simulation has been done using FLUENT. The Reynolds number ranges from 115 to 690 (corresponding to air inlet velocity 0.25 to 1.5m/sec) and emissivity ranges from 0.1 to 0.9. Temperatures of heat sources decrease with increase in velocity, thermal conductivity of PCB and the emissivity.read more
Citations
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Experimental investigation of substrate board orientation effect on the optimal distribution of IC chips under forced convection
V. K. Mathew,Tapano Kumar Hotta +1 more
TL;DR: In this article, steady-state experiments are conducted under the laminar forced convection heat transfer mode for cooling of seven asymmetric IC chips (heat sources) mounted at different positions on the substructure.
References
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Journal ArticleDOI
Analysis of mixed convection flows within a square cavity with uniform and non-uniform heating of bottom wall
TL;DR: In this article, a penalty finite element analysis with bi-quadratic elements is performed to investigate the influence of uniform and non-uniform heating of bottom wall on mixed convection lid driven flows in a square cavity.
Journal ArticleDOI
A numerical study of mixed convection in a horizontal channel with a discrete heat source in an open cavity
TL;DR: In this article, the authors investigated mixed convection heat transfer in a two-dimensional horizontal channel with an open cavity, where a discrete heat source is considered to be located on one of the walls of the cavity.
Journal ArticleDOI
Conjugate mixed convection with surface radiation from a horizontal channel with protruding heat sources
TL;DR: In this article, a numerical investigation of conjugate convection with surface radiation from horizontal channels with protruding heat sources has been carried out, where the flow is assumed to be steady, laminar, incompressible, hydrodynamically and thermally developing.
Journal ArticleDOI
Investigation of mixed convection heat transfer in a horizontal channel with discrete heat sources at the top and at the bottom
TL;DR: In this article, the effects of Reynolds and Grashof numbers on these numbers were investigated and the effect of the buoyancy affected secondary flow and the onset of instability have been discussed.
Journal ArticleDOI
A numerical investigation of conjugate heat transfer from a flush heat source on a conductive board in laminar channel flow
TL;DR: In this paper, a numerical investigation was conducted on the heat transfer from a uniformly powered strip source of heat located on the surface of a two-dimensional conducting substrate, where upper and lower surfaces of the substrate are cooled by forced laminar flow that is twodimensional, steady and with constant properties.