A Novel Numerical Approach For Convective and Radiative Heat Transfer Analysis of Fluid Flow Problems Within Triangular Cavities Using Natural Element Method

[+] Author and Article Information
Ardeshir Moftakhari

Cockrell School of Engineering, Department of Civil, Architectural and Environmental Engineering, University of Texas at Austin, Austin, TX, USA

Cyrus Aghanajafi

School of Mechanical Engineering, K. N. Toosi University Of Technology, Tehran, Iran

Ardalan Moftakhari Chaei Ghazvin

Department of Mechanical Engineering, Chemnitz University of Technology, Chemnitz, Germany

1Corresponding author.

ASME doi:10.1115/1.4036057 History: Received October 06, 2016; Revised February 14, 2017


Thermal analysis of fluid flow is always regarded as an important research issue within cavities in order to become familiar with the characteristics of the flow phenomenon under different situations. This research paper investigates the fluid and heat transfer analysis of a triangular cavity with fluid flow in it with the use of natural element methodology. This Galerkin based methodology has been introduced for a decade and almost demonstrate its efficiency in the numerical heat transfer analysis of problems in most engineering sciences. The fluid flow contains natural convection along with conduction and radiation heat transfer with the walls of the triangular medium, which have absorbing, emitting, semi-transparent and non-scattering characteristics. The final results investigate the effects of radiative and natural convection heat transfer on the fluid behavior of flow as expressed in Rayleigh number, stream function, strength of natural convection regime, etc., which are checked with other similar studies in the literature and shows its promising influence in improving the computational precision of a numerical approach in dealing with fluid mechanic problems.

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