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April 6, 2015, 16:52 |
mismatched contours CFD-Post
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#1 |
Senior Member
Join Date: Mar 2010
Posts: 172
Rep Power: 17 |
Hi all,
I hope you are well. I have a small question regarding contour plotting in CFD-Post. I am modelling a portion of the turbine (x1 blade passage), but i want to represent x2 passages in my post-processing for various reasons. If i select x2 data instances for my model, and plot my contours, the contour lines do not match up well at the periphery of the plane on which i am plotting the contours. (see figure). I am not sure why this is the case, the simulation is well converged and and the mesh is very regular in that region. I am using Fluent to solve, and as its a turbine passage, the outside of each passage (i.e. RHS / LHS of the contour plane) are modelled using cyclic / periodic BC's. Has anyone encountered this issue before? Many thanks and regards Jonathan |
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April 6, 2015, 20:26 |
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#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,655
Rep Power: 143 |
This is an issue with the way contour lines are rendered in CFD-Post. So it is a post-processing problem, not a solver problem.
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April 6, 2015, 20:41 |
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#3 |
Senior Member
Join Date: Mar 2010
Posts: 172
Rep Power: 17 |
Hi,
thanks very much for your answer ... Do you know whether there was ever a fix or workaround developed for it? When you say its a post-processing problem, do you mean it is one which cannot be mitigated when plotting cyclic boundary type problems (do you just live with it???) many thanks, regards jonathan |
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April 6, 2015, 20:47 |
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#4 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,655
Rep Power: 143 |
You can report it to ANSYS as a bug if you like.
I know of no way to work-around it. I just live with it. When you have a mesh fine enough to do an accurate simulation the mismatch is very small and hardly visible. |
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April 6, 2015, 20:52 |
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#5 |
Senior Member
Join Date: Mar 2010
Posts: 172
Rep Power: 17 |
Thanks a lot for the info mate, appreciate that. I was concerned it was something i was doing. good to know i am not the only one.
Might pass something on upstream to our local vendor - can't really hurt i guess! thanks again very much |
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cfd post, fluent, misaligned contours |
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