Thermosolutal convection from a discrete heat and solute source in a vertical porous annulus

M. Sankar, Beomseok Kim, Juan Lopez, Younghae Do

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Double-diffusive convection in a vertical annulus filled with a fluid-saturated porous medium is numerically investigated with the aim to understand the effects of a discrete source of heat and solute on the fluid flow and heat and mass transfer rates. The porous annulus is subject to heat and mass fluxes from a portion of the inner wall, while the outer wall is maintained at uniform temperature and concentration. In the formulation of the problem, the Darcy-Brinkman model is adopted to the fluid flow in the porous annulus. The influence of the main controlling parameters, such as thermal Rayleigh number, Darcy number, Lewis number, buoyancy ratio and radius ratio are investigated on the flow patterns, and heat and mass transfer rates for different locations of the heat and solute source. The numerical results show that the flow structure and the rates of heat and mass transfer strongly depend on the location of the heat and solute source. Further, the buoyancy ratio at which flow transition and flow reversal occur is significantly influenced by the thermal Rayleigh number, Darcy number, Lewis number and the segment location. The average Nusselt and Sherwood numbers increase with an increase in radius ratio, Darcy and thermal Rayleigh numbers. It is found that the location for stronger flow circulation is not associated with higher heat and mass transfer rates in the porous annular cavity.

Original languageEnglish (US)
Pages (from-to)4116-4128
Number of pages13
JournalInternational Journal of Heat and Mass Transfer
Volume55
Issue number15-16
DOIs
StatePublished - Jul 2012

Fingerprint

annuli
heat sources
mass transfer
solutes
convection
Rayleigh number
heat transfer
Mass transfer
Lewis numbers
buoyancy
Heat transfer
fluid flow
transition flow
Buoyancy
radii
Flow of fluids
Nusselt number
Transition flow
heat flux
flow distribution

Keywords

  • Double-diffusive convection
  • Heat and solute source
  • Porous annulus
  • Radius ratio

ASJC Scopus subject areas

  • Mechanical Engineering
  • Condensed Matter Physics
  • Fluid Flow and Transfer Processes

Cite this

Thermosolutal convection from a discrete heat and solute source in a vertical porous annulus. / Sankar, M.; Kim, Beomseok; Lopez, Juan; Do, Younghae.

In: International Journal of Heat and Mass Transfer, Vol. 55, No. 15-16, 07.2012, p. 4116-4128.

Research output: Contribution to journalArticle

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