ESTIMATION OF TURBULENT KINETIC ENERGY DISSIPATION RATE IN CHANNEL FLOW BY PIV

Accurate estimation of turbulence dissipation rate is very important for engineering and academic study of turbulence.It is challenging to measure the dissipation rate due to its complex definition. The measurement of the turbulence flow in a horizontal channel was performed by using PIV, and thus the method of using SGS model to estimate the turbulence dissipation rate was introduced and the advantage of such method was analyzed.All the estimation results were compared with the DNS’s results.The outcome of the corrected Smagorinsky model fitted the DNS’s results best.