The Solution of the Transient Diffusion-Radiation Binary Gas mixture Problem in Low Pressure Values between Two Flat Plates at a Gray Medium

Document Type : Research Article

Authors

1 department of mechanical engineering, University of Sistan and Baluchestan, Zahedan, Iran

2 Department of mechanical engineering, University of Sistan and Baluchestan, Zahedan, Iran

Abstract

In this research, a transient two-component radiation-penetration problem is solved numerically. This study aims at investigating the effect of the radiated absorbing gas density in low pressure values on the distribution of the medium temperature in terms of the time, position, and the amount of heat transferred from the radiation environment in terms of the time in two modes of radiation equilibrium and constant temperature of the medium. The modified discrete ordinates method was used to solve the radiation problem; while, the implicit finite volume method was used to solve the transient time penetration problem. The results were observed that the time effect of density led to the time effects on the ambient temperature distribution with a radiated balance and the effects cannot be neglected in states with 1 and 10 mass absorption coefficients. The problem analysis shows that although the radiation equation can be solved in a steady manner for the time interval of interest, one cannot neglect its time effects due to changes in the density of adsorbing gas even at low pressures. By analyzing the problem, it was determined that the temperature effect on density during the radiation equilibrium is rather than the penetration coefficient. This effect is not negligible in 1 and 10 mass absorbing coefficients; therefore this subject emphasizes the importance of considering the penetration coefficient in terms of temperature

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References

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Amirkabir Journal of Mechanical Engineering
Volume 52, Issue 6
September 2020
Pages 1687-1704

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