The Viscous Dissipation Effect in a Regular Polygonal Duct for H2 Boundary Conditions

2017 4th International Conference on Advanced Materials, Mechanics and Structural Engineering

材料科学;机械制造

Teleszewski, T.J.^1

Department of HVAC Engineering, Faculty of Civil and Environmental Engineering, Bialystok University of Technology, Wiejska 45A, Bialystok

15-351, Poland^1

关键词: Axial heat conduction;    Brinkman number;    H2 boundary conditions;    Laminar forced convections;    Numerical investigations;    Singular points;    Viscous dissipation;    Viscous dissipation process;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/269/1/012038/pdf
DOI  :  10.1088/1757-899X/269/1/012038

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

A numerical investigation based on the Boundary Element Method (BEM) was carried out to solve laminar forced convection with viscous dissipation in a straight regular polygonal duct with H2 boundary conditions. The axial heat conduction in the fluid is neglected. The effects of the Brinkman number and Nusselt number for both the wall heating case and the wall cooling case are considered. Nusselt numbers are obtained as a function of the number of sides of a regular polygonal duct and of the Brinkman number. The singular points of the Brinkman number and the Brinkman number for a limited Nusselt number when the total heat flux reached the heat flux that is generated internally by viscous dissipation processes are obtained.