Shan Chen Issue

I cleaned up a TODO that was left in the new Shan Chen Tutorials.

However, I found a new problem: the multi-phase version did not consistently take the force-dependent velocity shift into account during initialization. Is this intended?

When I switch to the seemingly 'correct' initialization the test fails.

Well, I only copied what Timm did. Conceptually, we first initialize the densities, calculate the initial distribution and only then calculate the force to be used in the first LB step. So I think it's fine.

added 1 commit

• a63af352 - Removed TODO from new shan chen tutorials

Compare with previous version

Ok, then Ι use the workaround.

However, it is not completely clear to me - my line of thought is the following:

• the initialization contains density gradients
• these gradients lead to a non-zero force
• in regions with non-zero force there should also be a velocity shift when Guo is used

With the workaround this velocity shift is ignored.

assigned to @bauer and unassigned @kuron

merged