The effect of cross diffusion namely Soret effect and Dufour effect on the convective diffusion of volatile organic compounds (VOCs) indoor environment is investigated in this paper. Based on the principle of thermodynamics of irreversible processes, a mathematical model is developed for the ternary component system (VOCs, dry air and water vapor) with compensating thermal and solute gradients, and this mathematical model is solved numerically by commercial CFD (Fluent) code. Profiles of the dimensionless velocity, temperature and concentration are shown graphically with Soret and Dufour coefficients. Furthermore, the cross diffusion effects on the mass transfer induced by two different solute (VOCs and water vapor) concentration gradients is numerical studied. Finally, numerical values of physical quantities, such as the average Nusselt number and Sherwood number are presented. The numerical results show that the temperature gradient and the water vapor concentration gradient have an effect on the convective diffusion of VOCs indoor environment, and the cross diffusion effects would be taken into consideration for the problem of simultaneous heat and mass transfer especially in the presence of large temperature and concentration gradients.
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ASME 2008 International Mechanical Engineering Congress and Exposition
October 31–November 6, 2008
Boston, Massachusetts, USA
Conference Sponsors:
- ASME
ISBN:
978-0-7918-4871-5
PROCEEDINGS PAPER
Numerical Study of Natural Convective Diffusion of VOCs With Soret and Dufour Effects in Ternary-Component System Available to Purchase
Baoming Chen,
Baoming Chen
Shandong Jianzhu University, Jinan, China
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Wenguang Geng,
Wenguang Geng
Shandong University, Jinan, China
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Maocheng Tian,
Maocheng Tian
Shandong University, Jinan, China
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Fang Liu
Fang Liu
Shandong Jianzhu University, Jinan, China
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Baoming Chen
Shandong Jianzhu University, Jinan, China
Wenguang Geng
Shandong University, Jinan, China
Maocheng Tian
Shandong University, Jinan, China
Fang Liu
Shandong Jianzhu University, Jinan, China
Paper No:
IMECE2008-68679, pp. 701-709; 9 pages
Published Online:
August 26, 2009
Citation
Chen, B, Geng, W, Tian, M, & Liu, F. "Numerical Study of Natural Convective Diffusion of VOCs With Soret and Dufour Effects in Ternary-Component System." Proceedings of the ASME 2008 International Mechanical Engineering Congress and Exposition. Volume 10: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A, B, and C. Boston, Massachusetts, USA. October 31–November 6, 2008. pp. 701-709. ASME. https://doi.org/10.1115/IMECE2008-68679
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