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Forum: Autodesk Simulation CFD

January 15, 2013, 12:48

Replies: 11

boundary conditions for analysis of a prop (External)

Views: 5,957

Posted By matt.brown.ae

RE:

Another option is to do a model with periodic symmetry. Here you can cut up your model and domain to isolate one blade and the corresponding section of your duct. So for a 3 blade model you will...

Forum: Autodesk Simulation CFD

January 15, 2013, 09:34

Replies: 11

boundary conditions for analysis of a prop (External)

Views: 5,957

Posted By matt.brown.ae

Also, on the zero velocity BC for the static...

Also, on the zero velocity BC for the static case: I have never actually had to model this. All of our analyses have a forward speed. My recommendation of zero velocity is pure speculation. I...

Forum: Autodesk Simulation CFD

January 15, 2013, 09:27

Replies: 11

boundary conditions for analysis of a prop (External)

Views: 5,957

Posted By matt.brown.ae

RE:

I have never tried to use zero pressure on the cylindrical face. It might work, but I just don't know. All of the external flow analysis we do is accomplished in the manner I described. The...

Forum: Autodesk Simulation CFD

January 14, 2013, 17:51

Replies: 11

boundary conditions for analysis of a prop (External)

Views: 5,957

Posted By matt.brown.ae

RE:

see comments in red

the water surface isn't important. we can assume the thruster is significantly deep enough that the surface effects are minimized and also that the water is deep enough that...

Forum: Autodesk Simulation CFD

January 9, 2013, 16:27

Replies: 11

boundary conditions for analysis of a prop (External)

Views: 5,957

Posted By matt.brown.ae

Attachment

Forgot the attachment.

Forum: Autodesk Simulation CFD

January 9, 2013, 16:25

Replies: 11

boundary conditions for analysis of a prop (External)

Views: 5,957

Posted By matt.brown.ae

RE: boundary conditions for analysis of a prop (External)

If I understand correctly, you are only concerned with what I have boxed in, (i.e. the ducted propeller)?

If you knew what the inflow conditions were at the front of the duct you could probably...

Forum: Autodesk Simulation CFD

January 8, 2013, 10:40

Replies: 11

boundary conditions for analysis of a prop (External)

Views: 5,957

Posted By matt.brown.ae

RE: boundary conditions for analysis of a prop (External)

I am not sure I understand what you are modeling. Can you post a shot of your geometry? Your description says external but then you talk about a tunnel. I want to make sure I understand what you...

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