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Different results mixing plane foam ext 3.2 & 4.0

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Old   July 29, 2018, 14:52
Unhappy Different results mixing plane foam ext 3.2 & 4.0
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Enrico De Filippi
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Hi guys, I'm studying an axial turbine, so to solve my stator and rotor fields I'm using mixing plane. The problem is that using steadyCompressibleMRFFoam with foam extend 3.2 all works fine while with 4.0 it takes to unphysical solution.

I can't use the 3.2 because I've to work with real gas whose library is not implemented in foam 3.2. I've already checked the source file in the finiteVolume and foam/meshes folder about mixingPlane trying to make the 4.0 more similar as possibile to the 3.2.
Did anybody of you already face this problem? Do you have any suggestion?
I leave the different results I get with 3.2 and 4.0 version:


Flux divergence min = 0.000232183584313 max = 1824125.33839 average: 1101.45637728
Mach number min = 0.00190838717129 max = 2.00273908446
Field U magnitude min = 0 max = 856.643527779
Field p min = 42331.9029619 max = 510310.051604
Field rho min = 0.306032525316 max = 7.79979800637
Field T min = 200 max = 500
Mixing plane pair (Outflow_stator, Inflow_rotor) : 0.345041766478 -0.345509719296 Diff = -0.000467952818715 or 0.135622079464 %



Flux divergence min = 4.55157280307e-05 max = 249609.441799 average: 114.297658371
Mach number min = 2.98841685868e-05 max = 2.5808451657
Field U magnitude min = 0 max = 500
Field p min = 5444.94477356 max = 1000000
Field rho min = 0.00619202851425 max = 17.379256264
Field T min = 3.19875761314 max = 7469.41474673
Mixing plane pair (Outflow_stator, Inflow_rotor) : 0.00214541998123 0.000282009095223 Diff = 0.00242742907645 or 113.144703493 %



Thanks in advance.
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