The Motion of a Single and Multiple Neutrally Buoyant Ellipses in Poiseuille Flow


Shih Di Chen

13:00:00 - 15:00:00

308 , Mathematics Research Center Building (ori. New Math. Bldg.)

Understanding the motion of rigid particles in neutrally buoyant flow is important for fundamental developments in suspension rheology, such as the fibers in a pulp, the red blood cells in the blood flow, and other particles of moderate aspect ratios in a similar flow. We investigate the motion of neutrally buoyant elliptical cylinders/ellipsoids in the plane/tube Poiseuille flow. The effects of the size ratio K, the aspect ratio A and the Reynolds number Re on the equilibrium position, the center-of-mass trajectory and the orientation dynamic of the ellipses are investigated and simulated by the distributed Lagrange multiplier/fictitious domain method. The major finding in the relationships between these parameters and the rheological effects are discussed in this talk.