EXPERIMENTAL AND COMPUTATIONAL STUDY OF TURBULENT HEAT-TRANSFER CHARACTERISTICS IN SERRATED CHANNEL FLOW

A two-dimensional (2-D) channel with a serrated wall is proposed as a device for heat transfer augmentation. Measurements of the flow veloci ty in the whole field as well as of the heat transfer coefficient alon g the wall are undertaken for two different channel heights, The same flow fields are calculated using a second-moment closure and the stand ard k-epsilon model. The flow field containing successive separation a nd reattachment partly resembles the conventional backward-facing step flow, although the extremely high turbulence level found in the prese nt configuration indicates a promising performance of the serrated cha nnel as a heat transfer promoter.