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Complex Chemistry Residuals

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Old   March 13, 2020, 12:10
Default Complex Chemistry Residuals
Bernhard Stiehl
Join Date: Oct 2018
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cheetthe1 is on a distinguished road
Hey all,

how do you bring down the residuals in a complex chemistry model? The model as such converges but some species show poor convergence. Those species (residual in the 100's and 1000's) are intermediate species, I assume I would have to refine the mesh grid more to get better convergence. Is there any best practice mesh resolution for steady RANS diffusion flames, I am at a mesh level 0.3 mm currently and cannot go much lower due to the domain size.
Also, my mesh is structured, would a polyhedral mesh possibly show better convergence?

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