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Warning error in Solver regarding mesh interpolation from 2D to 3D |
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#1 |
Senior Member
Joshua Counsil
Join Date: Jul 2009
Location: Halifax, Nova Scotia, Canada
Posts: 366
Rep Power: 18 ![]() |
Hey gang -
I have run many 2D simulations on various airfoils. I recently took my 2D grid and extended it 0.1c with 11 nodes in the spanwise direction to create a 3D grid. I was hoping to use a converged 2D solution as the initial condition for my 3D simulation. When I ran the simulation, Solver gave me the following warning: The target mesh does not intersect with any source meshes that have the same domain type and motion. Skip the interpolation. This seems to indicate that the 2D solution was not interpolated onto the 3D mesh. I found this confusing considering my 3D grid is identical to my 2D grid, but with differently named boundary conditions, differently named fluid, and a 0.1c span. I assumed CFX would just interpolate the 2D results across the 3D mesh as the initial condition, but this is not the case. Is CFX incapable of interpolating a 2D solution to a 3D mesh? If it can do it, do you know what I've done wrong? Thanks for any help. |
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#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,816
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The domain for your 3D model is longer than the 2D, isn't it? In that case the interpolator probably won't match it up properly.
Alternately it could be a bug in the interpolator. If you suspect this I would talk to CFX support about it. |
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#3 | ||
Senior Member
Joshua Counsil
Join Date: Jul 2009
Location: Halifax, Nova Scotia, Canada
Posts: 366
Rep Power: 18 ![]() |
Quote:
Quote:
Thanks, as always, Dr. H. |
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#4 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,816
Rep Power: 144 ![]() ![]() ![]() ![]() |
I think that is your problem. The interpolator is pretty dumb - if the meshes do not overlap in space it does not match them. So if your 2D mesh is in -z and the 3D mesh is in +z then you get no overlap and the interpolator does not map anything across.
I would translate the 3D mesh so it sits inside the 2D mesh in 3D space (if you know what I mean ![]() |
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#5 |
Senior Member
Joshua Counsil
Join Date: Jul 2009
Location: Halifax, Nova Scotia, Canada
Posts: 366
Rep Power: 18 ![]() |
That's what I was afraid of. Unfortunately, the 0.1 m extrusion is done purposefully as this specific case has been shown to be span-independent from about 0.1c to 0.3c, though the thinner it is, the better - 0.1c span with 10 nodes is better resolved than 0.3c with 10 nodes. Still, it might be worth trying.
Thanks! |
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#6 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,816
Rep Power: 144 ![]() ![]() ![]() ![]() |
No, I am not proposing changing your extrusion length, just the position in space where it sits. You will still have a 0.1m extrusion length. So instead of the mesh lying from z=0 to z=0.1, translate it to z=-0.3 to z=-0.2. Still a 0.1m extrusion, but translated a bit in z.
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#7 |
Senior Member
Joshua Counsil
Join Date: Jul 2009
Location: Halifax, Nova Scotia, Canada
Posts: 366
Rep Power: 18 ![]() |
Not only did your suggestion work, you beat the ANSYS support team to the answer, and I told them about it before posting here.
Thanks again, Dr. Glenn. |
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Tags |
interpolation, mesh, solver, three-dimensional, two-dimensional |
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