Order of force models

Submitted by marcurial on Thu, 10/25/2018 - 09:03

Hey Guys,

anyone else came across something like this:
By coincidence I changed the order of the force models in my Coupling Properties file. And even if the difference in the results of both simulations were not significant, there were some (compare Picture 1 and 2 - both were taken after the exact same time in the exact same setup (except the order of the force models))

Example for better understanding:
Case1:
forceModels
(
GidaspowDrag
gradPForce
viscForce
);
Case2:
forceModels
(
GidaspowDrag
viscForce
gradPForce
);

I tried every possible combination, you can get with three different force models, and found out, that the cases who had the same force model in last position produced the exact same results.

Did anyone of you came across something like this? Is this intended? If it's intended how do i decide the order of the force models? Or is it just a small numerical error ( which i think is the most likely explanation for that)?

If there ist any interest in this, let me know and I would provide some test cases.

Cheers
Mark