TY - JOUR
T1 - Laminar forced convection in a porous channel with localized heat sources
AU - Hadim, A.
PY - 1990
Y1 - 1990
N2 - A numerical study is performed to analyze steady laminar forced convection in a channel filled with a fluid-saturated porous medium and containing discrete heat sources on the bottom wall. Hydrodynamic and heat transfer results are reported for two configurations: (1) a fully porous channel and (2) a channel which contains porous layers located above the heat sources and is nonporous elsewhere. The flow in the porous medium is modeled using the Brinkman-Forchheimer-extended Darcy model. Detailed results of the evolution extended Darcy model. Detailed results of the evolution of the hydrodynamic and thermal boundary layers are provided. The results indicate that as the Darcy number decreases a significant increase in heat transfer is obtained, especially at the leading edge of each heat source. For fixed Reynolds number, the length-averaged Nusselt number reaches an asymptotic value in the Darcian regime (Da≤10-6). In the channel filled with a composite system of fluid and porous layers, it is found that when the width of the heat source and the spacing between the porous layers are of the same magnitude as the channel height, the heat transfer enhancement is almost the same as in the fully porous channel. This result suggests that the fluid/porous layer configuration is a potentially attractive heat transfer augmentation technique for electronic equipment cooling, an end which motivated this study.
AB - A numerical study is performed to analyze steady laminar forced convection in a channel filled with a fluid-saturated porous medium and containing discrete heat sources on the bottom wall. Hydrodynamic and heat transfer results are reported for two configurations: (1) a fully porous channel and (2) a channel which contains porous layers located above the heat sources and is nonporous elsewhere. The flow in the porous medium is modeled using the Brinkman-Forchheimer-extended Darcy model. Detailed results of the evolution extended Darcy model. Detailed results of the evolution of the hydrodynamic and thermal boundary layers are provided. The results indicate that as the Darcy number decreases a significant increase in heat transfer is obtained, especially at the leading edge of each heat source. For fixed Reynolds number, the length-averaged Nusselt number reaches an asymptotic value in the Darcian regime (Da≤10-6). In the channel filled with a composite system of fluid and porous layers, it is found that when the width of the heat source and the spacing between the porous layers are of the same magnitude as the channel height, the heat transfer enhancement is almost the same as in the fully porous channel. This result suggests that the fluid/porous layer configuration is a potentially attractive heat transfer augmentation technique for electronic equipment cooling, an end which motivated this study.
UR - http://www.scopus.com/inward/record.url?scp=0025628748&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0025628748&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:0025628748
SN - 0272-5673
VL - 156
SP - 79
EP - 85
JO - American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
JF - American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
T2 - Winter Annual Meeting of the American Society of Mechanical Engineers
Y2 - 25 November 1990 through 30 November 1990
ER -