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rhoCentralFoam solver with Slip BCs fails in Parallel Only |
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October 3, 2012, 00:15 |
rhoCentralFoam solver fails in Parallel Only (Possible Error In Processor Patch?)
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Nishit Joseph
Join Date: Nov 2010
Posts: 29
Rep Power: 15 |
NOTE: I appended the title, to reflect some new development. The old title was 'rhoCentralFoam solver with Slip BCs fails in Parallel Only'.
Hi OpenFoam Users! I am trying to solve the flow over a very small cylinder at near transonic Mach numbers using rhoCentralFoam (OF version 2.1.0). The issue is the solver does not have any Floating Point Exception Error when running as a single process. When I decompose the mesh and run on 4 cores it gives Floating Point Errors. On debugging (when running parallel) the error was at the point when mu was calculated using sutherlands Law because the T was -ve. Once again at this time step T is not -ve when using a single processor. To help me further debug, I modified rhoCentralFoam to
When running with constant boundary (wire wall) there is not problem running single/parallel. So switiching back the the slip boundary conditions. When running on a single processor none of the fileds are bounded (they are all reasonably valued). However, when running in parallel, very early in the run, the values of rho, rhoU, U fields are WAY off like an order of 10^6 off!. I have attached my modified solver "boundedRhoCentralFoam" and the case I am investigating "wire". The case has two initial conditions. The 0 used slip/temp jump condtions at the wire's wall. The 0.org has constant wall conditions. I believe the issue is with the BCs defined in the rhoCentralFoam solver:
I have reached my limit of debuging this problem, I would really appericate any help sugestion on this. Cheers! Nishit PS: My case file is a bit large (4MB). Please download from my google Drive Last edited by JLight; October 4, 2012 at 01:33. Reason: Forgot to attach files |
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