Search found 23 matches

by mattkoch
Sat Jul 21, 2018 2:26 am
Forum: code_saturne usage
Topic: turbomachinery, full transient and frozen rotor problems
Replies: 9
Views: 4764

Re: turbomachinery, full transient and frozen rotor problems

OK, I unpacked the file with great hope, only to see that it has .des mesh files (simail/nopo). How can I get these into Salome, so that I can see what the domains look like? Is it just a solid cylinder (int) inside a hollow cylinder (ext)? And volume 1 is the solid cylinder (presumably also the rot...
by mattkoch
Fri Jul 20, 2018 2:48 pm
Forum: code_saturne usage
Topic: turbomachinery, full transient and frozen rotor problems
Replies: 9
Views: 4764

Re: turbomachinery, full transient and frozen rotor problems

Wonderful, thank you Yvan. It will take me a while to dig into that example. Also, as you seem to suggest, I had contemplated changing the rotor such that the rotor/stator interface includes all moving surfaces, i.e. there would be no need to have sliding wall boundary conditions. For example, the r...
by mattkoch
Thu Jul 19, 2018 1:33 am
Forum: code_saturne usage
Topic: turbomachinery, full transient and frozen rotor problems
Replies: 9
Views: 4764

Re: turbomachinery, full transient and frozen rotor problems

Yvan, I have attached the Model.py file. All you have to do is load it as a script into Salome. It will create the geometry and the script. That may be the easiest for you to see what this looks like. I also just started to run this with 0 m/s on all boundaries, even the ones that I think should be ...
by mattkoch
Wed Jul 18, 2018 8:20 pm
Forum: code_saturne usage
Topic: turbomachinery, full transient and frozen rotor problems
Replies: 9
Views: 4764

Re: turbomachinery, full transient and frozen rotor problems

Hello, I am trying to make a hydraulic turbomachinery problem work. Would you, by any chance, be willing to share your solution, so I may learn from it? I think I have the meshing correct, at least as far as volumes and faces and such are concerned. I just can't specify the boundary conditions, e.g....
by mattkoch
Wed Jul 18, 2018 7:57 pm
Forum: code_saturne usage
Topic: turbomachinery rotating shaft surface velocity
Replies: 3
Views: 1857

Re: turbomachinery rotating shaft surface velocity

Thank you kindly, Yvan. When I try to enter anything else in the U, V or W fields shown in the attached screen shot, then the GUI does not accept the input. It seems I can only enter numbers here. I also recall that wherever I can enter equations, the GUI tends to have a button that I can push and t...
by mattkoch
Wed Jul 18, 2018 4:42 pm
Forum: code_saturne usage
Topic: turbomachinery rotating shaft surface velocity
Replies: 3
Views: 1857

turbomachinery rotating shaft surface velocity

I am trying out the turbomachinery module in the CS GUI. I still do not understand the turbomachinery setup completely, but one thing that I think needs to be present is a no-slip velocity boundary condition at the shaft wall. This cannot simply be [u,v,w] = [0,0,0], but must represent the circumfer...
by mattkoch
Thu Jun 15, 2017 1:50 pm
Forum: code_saturne usage
Topic: request for help with convergence problem
Replies: 1
Views: 1556

request for help with convergence problem

OK, so I really like the way Salome and code_saturne interact. When a problem converges, I feel very comfortable with this software combination now. The sad thing is, the fewest of the problems I have tried to tackle do actually converge. The latest problem I am trying to look at is the underfloor p...
by mattkoch
Wed Jun 14, 2017 4:12 pm
Forum: code_saturne usage
Topic: head loss K on free outlet
Replies: 1
Views: 1739

head loss K on free outlet

So, I am trying to run a relatively simple case where I specify a duct with a wall, an inlet with an imposed volume flow rate and an outlet that represents a throttle in real live. Obviously then, the outlet cannot be just a simple "outlet" to reference pressure. Instead, I think I will ha...
by mattkoch
Wed Jun 14, 2017 2:12 pm
Forum: code_saturne usage
Topic: Code_Staurne 5.0 check mesh
Replies: 7
Views: 4645

Re: Code_Staurne 5.0 check mesh

I see. I had created the case using the old 4.0. Now I did one with the new 5.0. It turns out, the "missing" script file for mesh processing is the same "runcase.bat" file. So that works now. The mesh output now also seems to end up in "preprocesor.log", not "check...
by mattkoch
Tue Jun 13, 2017 4:50 pm
Forum: code_saturne usage
Topic: Code_Staurne 5.0 check mesh
Replies: 7
Views: 4645

Re: Code_Staurne 5.0 check mesh

Hi Yvan, yes, I can see these two buttons now. I guess even in mesh mode, one actually has to go to "Calculation management" - > "Prepare batch calculation" and do a "Start calculation" with "Preprocessing type" set to "Mesh quality criteria"? Howeve...