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Sprayfoam Jet diverges

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Old   July 20, 2018, 05:07
Question Sprayfoam Jet diverges
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Hello guys, and thanks already for the upcoming help. I'm trying to do a Simulation of a spray flame with the Sprayfoam solver. To get a better start at the sprayFoam solver I started the same case in compressible mapped it to incompressible, simulated it again and mapped it to the sprayFoam solver. Till there everything worked fine, and i had not any convergence Problems. The geometry is a Wedge of a Sprayjet.

As soon as I started to simulate it in sprayFoam I'm gettting huge convergence problems. The residuals look like this:

I tried to lower the relaxation factors, but even if I'm setting them far smaller, the U_z component is still fluctuating completely. Normally it should be a convergent "pype-flow", since I'm not initiating any parcels into the flow right now.
Maybe someone here knows how to solve the convergence problem?
I attached the fvSolution fvSchemes and the Checkmesh.log in a zip file.

Thanks in advance


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Old   August 10, 2018, 09:21
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I figured the misstake out by myself, i used an inlet velocity of constant 36 m/s, somehow this wasn't as accurate as doing it with a constant inlet-mass. This fixed the problem.
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divergence, divergent, openfoam, sprayfoam

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