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October 26, 2015, 09:30 |
Patching Zones - DISCONTINUITY at Borders
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#1 |
New Member
Gergö Schmidt
Join Date: Oct 2015
Posts: 5
Rep Power: 11 |
Hi everybody
My problem is the following. I have two zones (z1 and z2). I patch two different pressure values (p1 and p2) to theese zones using "Solution -> Solution Initialization -> Patch". I want a discontinous pressure distribution on the border between z1 and z2 But Fluent produces a continous (smeared) transition on the border My question is therefor: is there an option for discontinuously patching values to zones? Or is there another way to assign initial conditions to zones? Thank you, kind regards, Gergö |
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October 26, 2015, 13:54 |
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#2 |
Senior Member
Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 5,760
Rep Power: 66 |
I am assuming you correctly patched a discontinuous pressure to two different cell zones. If so, I don't think that is an actual problem. Recall that Fluent is a finite-volume solver with dynamic variables stored at cell centers. Nothing is stored on cell faces. Hence you cannot specify anything at a border between two cell-zones. The face values are computed from the cell values according to the discretization schemes. The only exception is if you have a boundary condition, then the face values are imposed. The transition you are seeing is a plotting problem. But if you think that the discretization schemes are not appropriate for your problem, then you have a much bigger issue to deal with.
Last edited by LuckyTran; October 27, 2015 at 09:51. |
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October 27, 2015, 03:23 |
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#3 |
New Member
Gergö Schmidt
Join Date: Oct 2015
Posts: 5
Rep Power: 11 |
Thank You, LuckyTran! I forgot the cell centred property of the solver. Only two rows of cells are affected by the transition, so you're absolutely right!
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Tags |
discontinuous, patch, pressure, smearing, zones |
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