Open Access
ARTICLE
DOUBLE-DIFFUSIVE NATURAL CONVECTION OF LOW PRANDTL NUMBER LIQUIDS WITH SORET AND DUFOUR EFFECTS
Gang Qiua
, Mo Yanga,*, Jin Wangb
, Yuwen Zhangc
a
School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
b
College of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai 200240,China
c
Department of Mechanical & Aerospace Engineering, University of Missouri, Columbia, Missouri, MO 65211, USA
* Corresponding Author: Email:
Frontiers in Heat and Mass Transfer 2018, 10, 1-8. https://doi.org/10.5098/hmt.10.24
Abstract
An unsteady numerical model for double-diffusive natural convection of low Prandtl number liquids with Soret and Dufour effects inside the horizontal
cavity is developed. The thermosolutal model is solved numerically using the SIMPLE algorithm with QUICK scheme. The flow field, temperature
and concentration distributions for different buoyancy ratios, Rayleigh numbers and aspect ratios under different Prandtl numbers are studied
systematically. The results reveal that the flow structure develops from conduction-dominated to convection as buoyancy ratio increases under different
Prandtl numbers. Heat transfer intensity keeps constant and mass transfer intensity grows slowly before a critical point as Rayleigh number increases
for different Prandtl numbers. Then heat transfer intensity enhances dramatically and mass transfer intensity increases faster as Rayleigh number
increases after a critical point. The vortex number of flow structure, recirculation zones of isotherm and isoconcentration contours, heat and mass
transfer intensity increase as aspect ratio decreases under different Prandtl numbers.
Keywords
Cite This Article
Qiu, G., Wang, J. (2018). DOUBLE-DIFFUSIVE NATURAL CONVECTION OF LOW PRANDTL NUMBER LIQUIDS WITH SORET AND DUFOUR EFFECTS.
Frontiers in Heat and Mass Transfer, 10(1), 1–8.