Investigate the Effect of length parameter on heat transfer rate in porous fin in natural convection

Subject Areas : Optimization

Mohammad Jafarian ^{1 *} , Nader Rahbar ²

1 - Department of Mechanical Engineering
2 - Assistant Professor, Strategic Center for Energy and Sustainable Development

Received: 2016-12-04 Accepted : 2016-12-07 Published : 2016-11-21

Keywords: heat transfer, Natural convection, Porous fin, Darcy equation,

Abstract :

Always considering the scientific community as well as various industries including electronics industries to find new techniques to increase the heat transfer rate. The use of a porous media due to increase the effective surface provides a new window in this context. Therefore, in this study we are trying to find the optimal length for porous fin. In this study the effect of heat convection considered on a rectangular fin. Porous fin allows fluid to flow through and cause a better Natural Convection and Heat Transfer between them. Darcy Models have been applied to formulate Heat Transfer which is presented as a second order nonlinear equation. Geometry and porosity are classified with a Dimensionless Parameter. Thermal behaviors of Fins on Temperature Reduction including: long fin, finite-length fin with insulated tip, finite-length fin with known Convective Coefficient at the tip and finite-length fin with known temperature at the tip are found. Amount of Temperature Reduction and heat transfer are calculated.