The pattern formation in a suspension of 128 settling balls in a horizontally rotating cylinder
A suspension of 128 settling balls in a horizontally rotating cylinder filled fully with an
incompressible viscous Newtonian fluid:
- 0 < t < 2: Sedimenting to the bottom (zero rotating speed).
- 2 < t < 30: three clusters are forming.
- The whole cylinder is rotating with angular speed equal to 12.
- The length of the cylinder is 4 and its diameter is 1.
- The central axis of the cylinder is horizontal and the cylinder two ends are closed.
- The dimension of computational domain = (0,1+4h)x(0,4)x(0,1+4h).
- The diameter of balls = 0.15.
- The density of the ball = 1.25.
- The density of fluid = 1; the viscosity = 0.15.
- The mesh size for the velocity field = 1/64.
- The mesh size for the pressure = 1/32.
- The time step=0.001.
- The averaged ball speed for 50 < t < 60 seconds is 4.3 (the particle Re=4.3)