Large Eddy Simulation of Conjugate Heat Transfer in a Ribbed Channel: Reynolds Number Effect

Large eddy simulations were performed for the conjugate heat transfer in a ribbed channel with geometry, that mimics internal cooling passage of gas turbine, using 566, 100, 10, and 1 as solid fluid thermal conductivity ratios (K*) 30,000, 7000 (turbulent flow), 1000 (laminar flow) Reynolds numbers. A fully coupled simulation was conducted immersed boundary method (IBM) dynamic sub-grid-scale (SGS) model. In pure convection, decrease number from 30,000 to increased on wall by 5% but decreased rib 20%. When K* > effect is stronger than wall. laminar flow, conduction appears at low K*, promotion poor typical geometry. turbulent if ? then expected even number. For < performance flow worse thus, no expected.