Reply To: Advection Diffusion D3Q19 Boundary Condition
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Thank you very much for your suggestions! I will have a look at them and see if I can find a solution.
In my applications, when simulating atmospheric pollutant dispersion, I usually neglect molecular diffusivity compared to turbulent diffusivity, so this could be a problem; additionally, I initially have a source with concentration set to 1 whereas the rest of the domain is 0, which could be seen as a non-smooth initial condition. Maybe a possible improvement would be to smoothely increase the value of the concentration at the source from 0 to 1 ?
Anyway, I will have a look at your suggestions and also try the ELB collision model to see if I can get something useful out of it.
Thank you again for your valuable help! I will let you know if I succeed in any way.