How to choose between rotating zones and rotating walls? This article describes what to choose for different scenarios.
The following chart gives an overview over the current possible options to simulate motion in SimScale:
Wall Boundary Condition
Under the boundary condition wall you can choose between different options, such as moving wall and rotating wall.
A) Moving Wall
Moving wall can be applied for flat surfaces which has a movement that translates. You would choose this e.g. when you want to simulate a vehicle driving on a street:
B) Rotating Wall
Rotating walls can be applied to cylindrical surfaces which rotate:
This is only valid for cylindrical surfaces.
Rotating zones can be found under advanced concepts. Here you can choose between AMI and MRF. For transient simulations you need to select AMI and for steady state MRF. This document provides more technical background regarding rotating zones.
You select MRF if you have a geometry, that is not symmetric. Here you will have rotation for the whole mesh inside the rotating zone.
You normally need a rotating zone for simulating pumps, turbines or fans.