A numerical study of laminar heat transfer at bottom surface of a cavity submerged in separated flow region of duct

摘要: For the two cavity models whose upward and downward wall heights are different from each other, laminar heat transfer is studied numerically in a finite difference method. The effects of configuration, free-stream velocity buoyancy force on flow temperature fields as well at bottom surface discussed. pattern DOF (Downward-Facing cavity)-model more intricated than that UPF (Upward-Facing cavity)-model, depending aspect ratio or main velocity. mean Nusselt numberNu m both tends generally to increase with increasing ReHorGr w/Re H 2 . However, region ofRe H & 500 for DOF-cavity, theNu m 0.4 ≦ D2/D1 ≦ 0.6 somewhat lower obtained other cavities does not always increasingRe H.