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Species Diffusion on boundary

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Old   May 18, 2018, 11:13
Default Species Diffusion on boundary
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Hi everyone.
I am simulating a diffusion flame using Eddy break up. Instead of a burner I have a circular surface where I have the mass flow rate necessary for the pretended combustion power.

The problem that I have is that for low combustion powers like 50kw I prescribe a mass flow of 1E-3 kg/s, however on the plane just above the burner, I have a mass flow rate of fuel of 8E-3 kg/s. I assumed that was from the flow boundary diffusion on the segregated species. However, if I turn it off, the mass flow is correct (above the burner the mass flow is bellow 1E-3 kg/s), however I cannot converge the energy equation, since he always limits the minimum temperature on the edge of the burner surface.

Has anyone ever had this problem simulating diffusion flames??

Miguel Parente is offline   Reply With Quote


diffusion flame, flow boundary diffusion, mass flow rate inlet

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