[coastal593]

hi all,

i have an issue with spray problem i'm trying to solve. although the geometry is somewhat complex, there are 4 element types. 1) gas jet at the sprayer (inlet), 2) pressure sink (outlet), 3) solid walls, 4) atmosphere. my simulation continues to diverge and i was hoping someone might have some suggestions. my simulation is being done with dieselFoam.

(also, for unkonwn reasons i see --> FOAM FATAL ERROR : attempt to use janafThermo<equationofstate> out of temperature range 200 -> 5000 often, although it shows up randomly. even changing my initial time step may be the difference between seeing this error and not at the very start of the simulation. my droplet initial temperature is 295).

i have chemistry and turbulence turned off.

for walls i have U at fixedValue and p at zeroGradient.

pressure sink is p at totalPressure, uniform VALUE and U is pressureInletOutletVelocity, uniform (0 0 0).

gas jet is p at zeroGradient, U at fixedValue uniform (X, Y, Z).

atmosphere is fluxCorrectedVelocity, uniform (0 0 0) and p is totalPressure.

***i should note that in the middle of trying to work out these problems, i just went ahead and assigned every single boundary as p at zeroGradient and U at fixedValue, uniform (0 0 0) and i still have the same exact problems*** ... either i diverge if the simulation starts, or i end up with thermo out of range.

i feel like i must be missing something fairly simple that must explain this range of problems even in the simple case with p at zeroGradient and U at fixedValue.

any help would be greatly appreciated.

thanks,
anthony