Numerical investigation for convection heat transfer and friction factor under pulsatile flow conditions

Özet

Numerical investigation is made for understanding convection heat transfer and friction factor characteristic under pulsatile flow conditions at the periodic wavy channels. In the numerical study, the Finite Volume Method (FVM) is used. Reynolds Averaged Numerical Simulations (RANS) based turbulence models which are the k-ω, the Shear Stress Transport (SST) and the transition SST, are employed and compared each other. The results are also compared with the previous measurements performed for non-pulsating conditions. Air flow through wavy channel, which has sharp corrugation peak with an inclination angle of 30° and 5mm minimum channel height, is done. Reynolds number is taken from 6294 ro 7380, and Prandtl number is kept 0.7. Four different sinusoidal pulsatile flow conditions, which are combination of two different frequencies and two different amplitudes, are used. Amplitude and period of pulsatile flow effects are discussed