Two balls interact in a bounded shear flow: chaining and tumbling
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Two balls are close to each other initially. They chain and tumble in a bounded shear flow of a Newtonian fluid under creeping conditions.
- The dimension of computational domain = (-1.5, 1.5)x(-1,1)x(-0.5,0.5).
- The radii of the balls are 0.1.
- The density of the balls = 1.
- The density of fluid = 1.
- The viscosity = 1.
- The shear rate = 1.
- Top wall moves and the bottom wall is at rest .
- The initial mass centers are (-0.12037352, 0, 0.010531318) and (0.12037352, 0, -0.010531318), respectively. The initial gap size is 2h.
- The mesh size for the velocity field h= 1/48
- The mesh size for the pressure = 1/24
- The time step=0.001.