Flip fluids passing trough obstacle object (water)

Janlouis3000 · July 15, 2021, 2:32pm

Hello, I am trying to perform a simulation where I want to observe how the geomorphology of a cave affects the flow of water, the data of the cave was taken with a LIDAR. Pero cada vez que realizo en bake es como si la cueva no existiera

First step: Import the Cave in OBJ format
Second step: place a cube on top the cave
Third step: Place a square surrounding the Cave to be the domain.
Fourth step: Physical properties of the cube over the Cave - inflow (emissions substep - 3). Outside cube turned the domain and the Cave an obstacle.
Fifth step: Resolution at 500, solidifymodifer-thickness at 0.15 of the Cave and the remesh at 0.1m.
Step 6: Object → apply → scale.
Step 7: Bake

Now I will be making two more caves, but they are much bigger and I did it with your same steps and it is as if the cave did not exist, do you recommend me to make any changes or should I cut the cave because the size may be affecting?

https://sistemaupr-my.sharepoint.com/:u:/g/personal/janlouis_rodriguez_upr_edu/EchDEAktopBGhYVDtI-PyfkBAIFGu43SBglwpxpr7dqmkA?e=bYcjrW

RLGUY · July 15, 2021, 3:10pm

Hi, I am currently on holiday until July 22nd and do not currently have access to Blender, but I have some tips to help solve the issue:

Make sure that the geometry is manifold - I would suggest checking for manifold geometry after applying the solidify modifier. Sometimes the solidify modifier can produce undesirable or non-manifold geometry. The debugging tool mentioned in the document can be helpful for this situation.
See this document on resolving issues with thin walled geometry.
Depending on the situation, avoiding thin walled geometry and the solidify modifier could be the best solution by using the Obstacle Inverse Option
And incase it is applicable, try to size the domain so it fits tightly around the cave to optimize for baking speed and detail.

Hope this info helps! Let us know if you are still encountering problems and we will be able to take a look at the .blend file after July 22nd.