Hi!
I tried to follow this guide: Gas water heater venting malfunction - CO hazard - A step-by-step tutorial

and I have adapted the guide for my project.
Here is my project link: https://www.simscale.com/workbench/?pid=7167867202579841064&mi=spec%3Ae1c14eef-c23a-48d0-93ed-6541c036b1aa%2Cservice%3ASIMULATION%2Cstrategy%3A121%2Crun%3A139&ps=geometryPrimitives%2F0

In simulation run 4, I changed volume flow rate to 0.33 L/s. Am I correct in thinking that If I want to see the result T1 in ppm then I set the flux to 1e^6 1/(mÂłÂ·s)?
And why the result at outlets (re, ex, gap) still donâ€™t seem to converge?

Hello!

If you are looking to have 100% of contaminant entering the domain from that section on the wall, an easier way to obtain that would be with a velocity inlet condition, having a volumetric flow rate of interest (0.33 L/s) and a passive species value of e.g. 1:

This means that we have 0.33 L/s entering the domain with a scalar value of 1 = 100% scalar. In the post-processor, 1 = 100% scalar = 1000000 ppm and 0 = 0% scalar = 0 ppm.

Convergence-wise, you might have to play a bit with relaxation factors under numerics (maybe trying to go for â€śAutomaticâ€ť and maybe continuing with manual and trying out some options for passive scalar relaxation). This is can be very problem-dependent, so it can take some tests to see what works best for your case.

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I have another question, does the T1 graph need to be converged?

That would be optimal, yes.

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Hi, I tried to follow your guide and enter scalar value = 1000000 ppm. I was wondering that the proportion released isnâ€™t relative to the room volume? How can I do to make it the same proportion?