Movable components

Can I add a movable wall, like a fun shape, to mix the particles in CFD-DEM simulation?

There are no options to rotate objects out of the box. There are a couple of ways to rotate objects through udfs. The easiest thing to do is simply rotate gravity. If it is pure granular flow, you could also move the stl file through a udf. See discussion here: Application of Horizontal Dynamic Load - #4 by wfullmer