I am trying to make a rotating CFD simulation for vertical axis wind turbine. When assigning the enclosure I find that the blades of the turbine disappear and only the rotating region can be observed. The geometry also is automatically defined as one volume which is the flow region (see the picture below).
Hi there, you can try to create your Enclosure in your CAD assembly too, import it to SImScale, and then use our CAD mode to subtract the fins from it, does it make sense?
I’m trying to assign the MRF rotating zone but there is only one volume which is the flow region so I cannot select the cylinder. How do I make the MRF cylinder stay intact when assigning the enclosure.
I see, I think I might not have been clear in my previous messages, so I will write the process again:
Right not you have two parts in your CAD model:
The MRF region cylinder
The rotating blades
In your CAD software (not in SimScale) add a third part, which will represent the domain.
Upload your model to SimScale and enter the CAD mode. Then use the Subtract feature to remove the rotating blades from the Domain (only the domain, do not include the MRF region in this process).
At the end you should have the correct flow region, that will be void where the fins once were placed, and the intact MRF region.
Probably because you have not set the MRF region as a cell zone during the Mesh setup. Please have a look here, this explains the procedure: Rotating Zones | Advanced Concepts | SimScale
Very important: exclude the rotating cylinder from the operation
Hit Apply
At this point, you will have 3 volumes. The solid blades should be deleted from the geometry. Simply create a delete body operation and delete the blades:
Hit Apply and finally hit Finish. This will export the new geometry to SimScale, which will be appropriate to run MRF rotating zone geometries. As you can see, it contains the two necessary volumes.
There is a warning when I want to generate the mesh it said that my simulation setup is not valid. I’ve created the flow region using the method suggested and defined the rotating zone as a cell zone. Do you have any suggestion on how to fix this?
Hi again, the issue will be resolved when you generate the model the correct way, as Ricardo mentioned. All the steps are described in detail, so I believe this thread is settled
If you recreate the steps and there is still an issue, let us know, cheers!
