Direct numerical simulation of double diffusive natural convection in a closed mixture cavity heated from below

Author:

Xia Yaowen1,Chen Juan2

Affiliation:

1. Education Ministry Key Laboratory of Advanced Technology and Preparation for Renewable Energy Materials, Kunming, Yunnan, China + School of Information Science and Technology, Yunnan Normal University, Kunming, China

2. School of Information Science and Technology, Yunnan Normal University, Kunming, China

Abstract

Double diffusive natural convection is one of the most widely used study subjects in heat and mass transfer. In this present study, double diffusive natural convection heating from below the wall in a closed cavity was studied with direct numerical simulation method. The flow characteristics are presented as isotherms, iso concentrations, and streamlines. The results show that RaT has signification strong effects on average Nusselt number, with a more considerable RaT, the value of Nusselt number more higher. These were also found to increase with increasing buoyancy ratio for adding flow and decrease as buoyancy ratio decreases for opposing flows

Publisher

National Library of Serbia

Subject

Renewable Energy, Sustainability and the Environment

Reference42 articles.

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2. Hunt, G. R., et al., Fountains in Industry and Nature, Annual Review of Fluid Mechanics, 47 (2015), 1, pp. 195-220

3. Ostrach, S., Natural-Convection with Combined Driving Forces, Physicochem-Ical Hydrodynamics, 1 (1980), 4, pp. 233-247

4. Goyeau, B., et al., Numerical Study of Double-Diffusive Natural-Convection in a Porous Cavity Using the Darcy-Brinkman Formulation, International Journal of Heat and Mass Transfer, 39 (1996), 7, pp. 1363-1378

5. Ha, S. H., et al., Heat Transfer Study of Double Diffusive Natural Convec-Tion in A 2-D Enclosure at Different Aspect Ratios and Thermal Grashof Number During the Physical Vapor Transport of Mercurous Bromide (HG 2 br 2) - Part I: Heat Transfer, Journal of the Korean Crystal Growth and Crystal Technology, 32 (2022), 1, pp. 16-24

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