The flow and heat transfer characteristics in the latticework cooling structure with U shaped sub-channels combined with dimple vortex generators were studied experimentally and numerically

the numerical computation model could reasonably predict the heat transfer and pressure loss in the latticework cooling channels.Based on the satisfactory validation of numerical computation

a comparative numerical investigation was made on the flow and heat transfer in the latticework cooling structures with three sub-channel configurations:U shaped sub-channels with dimples

U shaped sub-channels and rectangular sub-channels.The computational results show that

as compared to the case of rectangular sub-channel

U shaped sub-channels could improve the flow capability in the bottom of the sub-channels

helping to reduce the flow resistance while decreasing the heat transfer slightly.The Dimples arranged in the U sub-channels distinctively increased the turbulent mixing in the bottom flow

thereby significantly enhancing the convective heat transfer while increasing the flow resistance in the cooling channels.