Abstract
Natural convective heat transfer from a heated horizontal and vertical surfaces directly exposed into air which vertical fins, attached to a surface, project vertically downwards has been numerically studied. It has been assumed that the fins are everywhere at the temperature of the surface. The governing equations, written in dimensionless form, have been solved using the finite element procedure. The results show that vertical plate with vertical fins gives the best performance for natural cooling.
Highlights
The vertical and horizontal plate configurations are the most common geometry for a naturally cooled heat sink
The results show that vertical plate with vertical fins gives the best performance for natural cooling
This situation has been considered for free convective heat transfer from a heated horizontal and vertical surface directly exposed to air with a free surface to vertical fins attached to surface that project vertically downward into the air has been studied by Smith, H. [3] and Magyaro, L and pep, H [4]
Summary
The vertical and horizontal plate configurations are the most common geometry for a naturally cooled heat sink. The configuration has been studied by number of researchers. The most commonly used predictive equation for convection was derived by Barcohen, S. D & Bar-Dohen [2] This situation has been considered for free convective heat transfer from a heated horizontal and vertical surface directly exposed to air with a free surface to vertical fins attached to surface that project vertically downward into the air has been studied by Smith, H. & Magata, B, [5] but they did not derive an accurate equation which matched the full range of their experimental data. This work compares horizontal plate heat sinks with vertical plate heat sink for natural cooling application.
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