Coupled Thermal Radiation and Mixed Convection Step Flow of Nongray Gas-Reference-Cited by-同舟云学术

Coupled Thermal Radiation and Mixed Convection Step Flow of Nongray Gas

Published:2016-04-19 Issue:7 Volume:138 Page:
ISSN:0022-1481
Container-title:Journal of Heat Transfer
language:en
Short-container-title:

Author:

Atashafrooz M.¹,Gandjalikhan Nassab S. A.²,Lari K.³

Affiliation:

1. Mechanical Engineering Department, Sirjan University of Technology, Sirjan, Iran

2. Mechanical Engineering Department, School of Engineering, Shahid Bahonar University of Kerman, Kerman, Iran e-mail:

3. Mechanical Engineering Department, Graduate University of Advanced Technology, Kerman, Iran

Abstract

The main goal of this paper is to analyze the thermal and hydrodynamic behaviors of laminar mixed convection flow of a nongray radiating gas over an inclined step in an inclined duct. The fluid is considered an air mixture with 10% CO2 and 20% H2O mole fractions, which is treated as homogeneous, absorbing, emitting, and nonscattering medium. The full-spectrum k-distribution (FSK) method is used to handle the nongray part of the problem, while the radiative transfer equation (RTE) is solved using the discrete ordinate method (DOM). In addition, the results are obtained for different medium assumptions such as pure mixed convection and gray medium to compare with the nongray calculations as a real case. The results show that in many cases, neglecting the radiation part in computations and also use of gray simulations are not acceptable and lead to considerable errors, especially at high values of the Grashof number in mixed convection flow.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Link

http://asmedigitalcollection.asme.org/heattransfer/article-pdf/doi/10.1115/1.4033095/6212292/ht_138_07_072701.pdf

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