THEORETICAL INVESTIGATION OF WALL EFFECT ON DRAG COEFFICIENT OF DIFFERENT PARTICLES SHAPE MOVING IN NON-NEWTONIAN FLUIDS
Keywords:
drag coefficient, wall effect, theoretical, non-Newtonian fluids, ANSYS FLUENT.Abstract
In this study ,the settling velocity for spherical and non-spherical particle vertically settling in non-Newtonian fluid .The settling velocity calculated by derived the equation for motion particle and this equation solved by MATLAB program ,then this value supported to ANSYS FLUENT 15.0 to evaluate the drag force on the particles .The effect of finite wall on the particle expressed by settling particle along the axis of cylindrical tubes .The governing equation and boundary condition were numerically solved in a wide range of diameter ratio (0.118- 0.814),the result show that the finite wall lead to increase in the drag force and the settling velocity depend on sphericity and diameter for particle ,this investigation important to reduce the hydrodynamic drag in many application.
