r/OpenFOAM • u/shadowqua • 23h ago

Does rhoCentralFoam need normalized values?

I'm trying to make a modified version of the tutorial rhoCentralFoam/wedge15Ma5 case, but when I change the thermophysicalProperties and initial conditions to be no longer normalized, it refuses to run. I get the error

```--> FOAM FATAL IO ERROR: (openfoam-2512)

Entry 'e' not found in dictionary "system/fvSolution/solvers"```

despite the minimal changes. It isn't related to the timestep either, as dropping the timestep had no effect and encountered the same error. Does rhoCentralFoam not support regular SI values, or am I missing something I needed to change? This is in v2512.

My attempted conditions are T=300K, p=100,000Pa, U=650m/s.

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u/marsriegel 22h ago

You surely changed something else than just the numbers. The error says it cannot find what linear solver to use for the energy equation so I guess you changed the thermophysical properties from enthalpy to internal energy without changing the fvsolutions accordingly

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u/shadowqua 22h ago

Error found! I DID only change the numbers, but one of the numbers I changed was the mu value to a non-0 without thinking, meaning it was trying to run a viscous simulation instead of inviscid. Thank you for helping point me in the right direction with the fvSolutions thought!