Moving circle in the closed channel

The following examples concern flow around a moving circle in the closed channel.

The aim of the following simulations is just to demonstrate the utility of our "Fictitious Boundary Conditions": All calculations are performed on ONE SINGLE mesh which does not change! The position of the actual boundary is determined via "filters" and incorporated into the iterative solvers! A more detailed description of the underlying mathematical and numerical concepts is given in Stefan Turek's CFD-book, Springer

The complexity of the physical problem depends on the:

• size of the ball and the channel
• speed of the ball
• viscosity parameter

A systematic variation of these different configurations is part of the following flow situations.

• "Moving Circle" (I) at medium Reynolds number