I am trying to simulate the air flow and particles trajectories in a pin-mill and understand how the pins interactions affect those 2.
Here is what I got for 2 rows of pins:
To me, this doesn't reflect the rotating/fixed pins effects on the flow and on the particles as I would expect some drastic flow lines direction changes especially when moving pins pass close to fixed pins.
So, is it actually possible to simulate such things with SW Flow Simulation? = simulate effects due to interactions between moving and fixed parts (stator) which are NOT axis symmetrical .
The model (attached) is like this:
- a fixed part with a big hole in the middle (stator) and pins equally distributed at the periphery (left part on the picture below)
- a rotating part (rotor) with pins equally distributed and passing at 1 mm beside the fixed ones (right part), rotation is set here at 1'000 rpm CCW
- all declared as real walls
- a rotating region englobing the entire rotor (thus also englobing the fixed pins but declared as stator)
- input and output lids to play with flow parameters
An additional question: When declaring walls (real in my case), when to use moving walls instead of the general rotating region? What is the difference? Should I use this? (I did try though .. without success)
Thanks for your feedbacks, BR
moving walls vs rotating regions is usually straight forward. in this case the walls aren't moving, the part is rotating, so you need rotation.
but i don't think this will be a good fit for rotating regions, check the technical reference and kb on the why's. but basically it is for things that look like impellers that have completely axisymmetric flow.