Effects of Numerical Methods on the Calculation of Developing Plane Channel Flow

In wall-bounded turbulent flow calculations, the past focus has been directed to modelling of Reynolds-stress gradients. Not much attention paid effects numerical methods used calculate these terms and modelled equations. Discrepancies between model calculations measurements are quite often attributed incorrect modelling, while suitability accuracy seldom scrutinized. Instead, alternate near-wall models proposed remedy calculations. On other hand, if care is not taken in treatment gradient terms, physically unrealistic results solution instability could occur. Previous studies by author his collaborators on have shown that some more commonly enhance stability procedure but would introduce considerable inaccuracy results. The cases chosen demonstrate inaccuracies a backstep square duct, where complexities present. current investigation attempts show above-mentioned also occur calculation developing plane channel flow, absent. addition, this study shows thus obtained lead predicted skin friction coefficient influenced method than turbulence invoked. Together, gradients equations play an important role, even for flow.