Non-Newtonian Natural Convection Along a Vertical Flat Plate With Uniform Surface Temperature

摘要: Natural-convection boundary-layer flow of a non-Newtonian fluid along heated semi-infinite vertical flat plate with uniform surface temperature has been investigated using four-parameter modified power-law viscosity model. In this model, there are no physically unrealistic limits zero or infinite that encountered in the formulation for two-parameter Ostwald–de Waele fluids. The leading-edge singularity is removed coordinate transformation. equations solved by an implicit finite-difference marching technique. Numerical results presented case shear-thinning fluid. indicate similarity solution exists locally region near leading edge plate, where shear rate not large enough to induce effects; identical Newtonian size depends on Prandtl number. Downstream region, nonsimilar. As increases beyond threshold value, reduced. This leads decrease wall stress compared reduction accelerates close wall, resulting increase local heat transfer