TY - JOUR
T1 - Non-Darcy natural convection of a non-Newtonian fluid in a porous cavity
AU - Hadim, H.
PY - 2006/12
Y1 - 2006/12
N2 - A numerical study of non-Darcy natural convection in a porous enclosure saturated with a power-law fluid is presented. Hydrodynamic and heat transfer results are reported for the configuration in which the enclosure is heated from a side-wall while the horizontal walls are insulated. The flow in the porous medium is modeled using the modified Brinkman-Forchheimer-extended Darcy model for power-law fluids, which accounts for both inertia and boundary effects. The results indicate that when the power law index is decreased, the circulation within the enclosure increases leading to a higher Nusselt number and these effects are enhanced as the Darcy number is increased. Consequently as the power law index decreases, the onset of the transitions from Darcy regime to Darcy-Forchheimer-Brinkman regime to asymptotic convection (boundary layer) regime shift to higher corresponding values of the Darcy number. An increase in Rayleigh number produces similar effects as a decrease in power law index.
AB - A numerical study of non-Darcy natural convection in a porous enclosure saturated with a power-law fluid is presented. Hydrodynamic and heat transfer results are reported for the configuration in which the enclosure is heated from a side-wall while the horizontal walls are insulated. The flow in the porous medium is modeled using the modified Brinkman-Forchheimer-extended Darcy model for power-law fluids, which accounts for both inertia and boundary effects. The results indicate that when the power law index is decreased, the circulation within the enclosure increases leading to a higher Nusselt number and these effects are enhanced as the Darcy number is increased. Consequently as the power law index decreases, the onset of the transitions from Darcy regime to Darcy-Forchheimer-Brinkman regime to asymptotic convection (boundary layer) regime shift to higher corresponding values of the Darcy number. An increase in Rayleigh number produces similar effects as a decrease in power law index.
KW - Natural convection
KW - Porous medium
KW - Power law fluid
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U2 - 10.1016/j.icheatmasstransfer.2006.08.004
DO - 10.1016/j.icheatmasstransfer.2006.08.004
M3 - Article
AN - SCOPUS:33750843977
SN - 0735-1933
VL - 33
SP - 1179
EP - 1189
JO - International Communications in Heat and Mass Transfer
JF - International Communications in Heat and Mass Transfer
IS - 10
ER -