Numerical Simulation of Fiber Suspension Flow

Flow patterns and fiber orientation in the two-dimensional branching flow of fiber suspensions are calculated using the Dinh-Armstrong model. Fiber orientation is obtained by integration of the Jeffery's equation along a streamline.A vortex, which is not observed in the Newtonian flow, occurs near the corner at low Reynolds number. The dependence of vortex height on Reynolds number and a parameter α is discussed.Some fibers are at almost right angle with a streamline. Furthermore, the application of stress relief mechanism is examined for onset of the vortex.