Working Paper Article Version 1 This version is not peer-reviewed

Analysis of Energy Flux Vector on Natural Convection Heat Transfer in Porous Wavy-Wall Square Cavity with A Partially-Heated Surface

Version 1 : Received: 16 October 2019 / Approved: 17 October 2019 / Online: 17 October 2019 (11:00:16 CEST)

How to cite: Lin, Y.; Cho, C. Analysis of Energy Flux Vector on Natural Convection Heat Transfer in Porous Wavy-Wall Square Cavity with A Partially-Heated Surface. Preprints 2019, 2019100192 Lin, Y.; Cho, C. Analysis of Energy Flux Vector on Natural Convection Heat Transfer in Porous Wavy-Wall Square Cavity with A Partially-Heated Surface. Preprints 2019, 2019100192

Abstract

The study utilizes the energy-flux-vector method to analyze the heat transfer characteristics of natural convection in a wavy-wall porous square cavity with a partially-heated bottom surface. The effects of the modified Darcy number and modified Rayleigh number on the energy-flux-vector distribution and mean Nusselt number are examined. The results show that when a low modified Darcy number with any value of modified Rayleigh number is given, the recirculation regions are not formed in the energy-flux-vector distribution within the porous cavity. Therefore, a low mean Nusselt number is obtained. The recirculation regions do still not form and thus the mean Nusselt number has a low value when a low modified Darcy number with a high modified Rayleigh number is given. However, when the values of the modified Darcy number and modified Rayleigh number are high, the energy flux vectors generate recirculation regions and thus a high mean Nusselt number is obtained.

Subject Areas

energy-flux-vector; porous cavity; natural convection; wavy-wall

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