Abstract
Unsteady three-dimensional conjugate heat and mass transfer in an enclosure having finite thickness heat-conducting walls has been analyzed numerically. The governing unsteady, three-dimensional flow, energy and contaminant transport equations for the gas cavity and unsteady heat conduction equation for solid walls, written in dimensionless terms of the vector potential functions, the vorticity vector, the temperature and the concentration, have been solved using an iterative implicit finite-difference method. Main attention was paid to the effects of the Rayleigh number, buoyancy ratio and the dimensionless time on the flow structure and heat and mass transfer regimes. It should be noted that the dominant cause of the oscillations in the dimensionless time dependences of the average Nusselt number on the heat source surface and the average Sherwood number on the contaminant source surface at Ra>5×105 is the mutual influence of the analyzed object geometry and the thermo-diffusivity impact on the flow. The change in the buoyancy ratio can lead to the essential modifications of the flow, temperature and concentration fields owing to the significant influence of the concentration gradient.
| Original language | English |
|---|---|
| Pages (from-to) | 851-862 |
| Number of pages | 12 |
| Journal | Meccanica |
| Volume | 48 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 1 May 2013 |
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Keywords
- Conjugate heat and mass transfer
- Cube
- Heat and contaminant sources
- Mathematical simulation
- Natural convection
- Vector potential functions
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
Cite this
Combined natural convection heat and mass transfer in an enclosure having finite thickness walls. / Sheremet, Mikhail A.
In: Meccanica, Vol. 48, No. 4, 01.05.2013, p. 851-862.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Combined natural convection heat and mass transfer in an enclosure having finite thickness walls
AU - Sheremet, Mikhail A.
PY - 2013/5/1
Y1 - 2013/5/1
N2 - Unsteady three-dimensional conjugate heat and mass transfer in an enclosure having finite thickness heat-conducting walls has been analyzed numerically. The governing unsteady, three-dimensional flow, energy and contaminant transport equations for the gas cavity and unsteady heat conduction equation for solid walls, written in dimensionless terms of the vector potential functions, the vorticity vector, the temperature and the concentration, have been solved using an iterative implicit finite-difference method. Main attention was paid to the effects of the Rayleigh number, buoyancy ratio and the dimensionless time on the flow structure and heat and mass transfer regimes. It should be noted that the dominant cause of the oscillations in the dimensionless time dependences of the average Nusselt number on the heat source surface and the average Sherwood number on the contaminant source surface at Ra>5×105 is the mutual influence of the analyzed object geometry and the thermo-diffusivity impact on the flow. The change in the buoyancy ratio can lead to the essential modifications of the flow, temperature and concentration fields owing to the significant influence of the concentration gradient.
AB - Unsteady three-dimensional conjugate heat and mass transfer in an enclosure having finite thickness heat-conducting walls has been analyzed numerically. The governing unsteady, three-dimensional flow, energy and contaminant transport equations for the gas cavity and unsteady heat conduction equation for solid walls, written in dimensionless terms of the vector potential functions, the vorticity vector, the temperature and the concentration, have been solved using an iterative implicit finite-difference method. Main attention was paid to the effects of the Rayleigh number, buoyancy ratio and the dimensionless time on the flow structure and heat and mass transfer regimes. It should be noted that the dominant cause of the oscillations in the dimensionless time dependences of the average Nusselt number on the heat source surface and the average Sherwood number on the contaminant source surface at Ra>5×105 is the mutual influence of the analyzed object geometry and the thermo-diffusivity impact on the flow. The change in the buoyancy ratio can lead to the essential modifications of the flow, temperature and concentration fields owing to the significant influence of the concentration gradient.
KW - Conjugate heat and mass transfer
KW - Cube
KW - Heat and contaminant sources
KW - Mathematical simulation
KW - Natural convection
KW - Vector potential functions
UR - http://www.scopus.com/inward/record.url?scp=84876499121&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84876499121&partnerID=8YFLogxK
U2 - 10.1007/s11012-012-9638-y
DO - 10.1007/s11012-012-9638-y
M3 - Article
VL - 48
SP - 851
EP - 862
JO - Meccanica
JF - Meccanica
SN - 0025-6455
IS - 4
ER -