A numerical study of the side-wall effects on turbulent bands in channel flow at transitional Reynolds numbers

We investigated the side-wall effects on turbulent bands in channel flow at transitional Reynolds numbers by direct numerical simulations using open source spectral-element code Nektar++. The width-to-height aspect ratio of 50:1 is considered for this study. Our study shows that can survive collision with side wall above bulk number Re≃1000 but decay below Re≃975, i.e. critical should be approximately between two numbers. also discussed about underlying mechanism band low and potential larger spanwise widths than our results are informative experimental studies turbulence