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Fluid not colliding

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KiLa
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Hi,

if you look the attached file… why is the fluid falling through the collisionObject?

But when i select the sphere, inside the collisionObject, it is working correctly.

I was trying to make water mill and was a bit surprised to se that the water was falling through

Attachments:
fluid_test.hipnc (261.6 KB)

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circusmonkey
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Good attempt ! . ! See attached.

Rob

Attachments:
rse_dops_FLIPwaterWheel.hip (1.2 MB)

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KiLa
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Aah, you are using the new FLIP solver… But if, for some bizarre reason , i would like to use the “old” method… why is the fluid falling through my object?
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sadhu
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Increasing thickness of the box in Y(up to 3) is giving much better results.
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KiLa
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The collisionObject thickness? Is that the only solution? I would like to keep the collisionObject object thin.
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eetu
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Moro!

I think it's a combination of your collision object thickness being 0.1, the fluid voxel resolution being the same 0.1, and the fluid moving more than that in a frame.

There might be more elegant ways, but doubling the voxel resolution and using 2 substeps makes it behave.
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KiLa
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Päiveetä!

By increasing the box thickness to 0.2, it started to behave.

But with the orginal thickness and collision divisions 100x100x100 (staticObject1 - Collisions - Volume - Divisions) and min substeps 2 (fluidsolver1 - Advanced - Min Substeps) it didn’t
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eetu
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KiLa
But with the orginal thickness and collision divisions 100x100x100 (staticObject1 - Collisions - Volume - Divisions) and min substeps 2 (fluidsolver1 - Advanced - Min Substeps) it didn’t

Yea, it's not about the collision object divisions, it's about the collision object's thickness compared to the resolution of the fluid.
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sadhu
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Hey eetu! Thanks a lot for the reply. Now I got the reason why fluid was passing through the static object and why increasing the thickness of the box started giving better results.
: )
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KiLa
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Haa! Now its working Thank you E!
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