Numerical Simulation of Solid and Porous Fins’ Impact on Heat Transfer Performance in a Differentially Heated Chamber

Le Xuan Hoang Khoa,Ioan Pop,Mikhail A Sheremet

doi:10.3390/math10020263

Abstract

The development of different industrial fields, including mechanical and power engineering and electronics, demands the augmentation of heat transfer in engineering devices. Such enhancement can be achieved by adding extended heat transfer surfaces to the heated walls or heat-generating elements. This investigation is devoted to the numerical analysis of natural convective energy transport in a differentially heated chamber with isothermal vertical walls and a fin system mounted on the heated wall. The developed in-house computational code has been comprehensively validated. The Forchheimer–Brinkman extended Darcy model has been employed for the numerical simulation of transport phenomena in a porous material. The partial differential equations written, employing non-primitive variables, have been worked out by the finite difference technique. Analysis has been performed for solid and porous fins with various fin materials, amounts and heights. It has been revealed that porous fins provide a very good technique for the intensification of energy removal from heated surfaces.

Highlights

Academic Editors: Irina Cristea, Energy transport enhancement can be achieved using different passive techniques, including modern heat transfer liquids or extended heat transfer surfaces [1,2,3]
In the case of forced and mixed convective energy transport, solid and porous fins are widely used in different channels and tubes [4,5,6,7,8,9,10]
Kumar and Jayavel [5] have numerically analyzed the influence of porous fins in a rectangular microchannel on heat transference augmentation compared to solid fins

Summary

Introduction

Academic Editors: Irina Cristea, Energy transport enhancement can be achieved using different passive techniques, including modern heat transfer liquids (non-Newtonian fluids, nanofluids) or extended heat transfer surfaces [1,2,3]. Using the primitive variables and finite volume technique, the authors have analyzed the impact of the Reynolds and Darcy numbers, as well as fin sizes and the thermal conductivity ratio on flow structures, entropy generation and the heat transfer regime. Analysis is often performed using tion about the influence of a porous fin located at the heated wall, or the length of this fin on commercial software and sometimes in-house computational codes with primitive variaenergy transference enhancement. Fer aim performance in a differentially heated chamber with solid and porous horizontal fins, the of the present research is a computational analysis of energy transfer performance taking into account the fins’. Number, location and material.fins, Analysis conin a differentially heated chamber withlength, solid and porous horizontal takinghas intobeen account ducted the basis of a developed in-house computational using non-primitive the fins’ on number, length, location and material.

Numerical Technique

Discussion

Conclusions