Physics Fluid Simulation Leaking Through Obstacle Blender Stack Your fluid simulation (including resolution) are directly linked to the scales. you have to apply them with ctrl a menu in object mode (and as they are inverted, you will also need to invert the normals via ctrl n in edit mode). I’m trying to animate fluid flowing through a valve. i made two obstacles. one is a box with an l shaped tube running through it, and the other is a smaller box to act as the opening valve. the fluid works fine at first. it goes through the tube and sits at the closed valve.
Blender Fluid Simulation Liquid Particles Leaking Blender Stack Exchange There is an option (atleast in 2.79) under fluid boundary for the domain labeled "remove air bubbles" which is ticked by default. it will prioritize removing air bubbles over respecting the obstacle. make sure to disable that option in addition to all the other changes. The simulation works on a grid, and if the obstacle is too thin, it may not show up effectively on the simulation grid. this will cause fluid to slip through the obstacle. Try to apply modifiers on your obstacle, especially solidify. fluid seems to leak when the obstacle's geometry has to be computed on the fly. If you are having trouble with fluid passing through thin walls during a fluid simulation then you can disable “remove air bubbles” in the fluid boundary settings for your domain object. if you are rendering an opaque object, such as a coffee mug, then no further steps should be required.
Blender Fluid Simulation Liquid Particles Leaking Blender Stack Exchange Try to apply modifiers on your obstacle, especially solidify. fluid seems to leak when the obstacle's geometry has to be computed on the fly. If you are having trouble with fluid passing through thin walls during a fluid simulation then you can disable “remove air bubbles” in the fluid boundary settings for your domain object. if you are rendering an opaque object, such as a coffee mug, then no further steps should be required. As for fluid objects, the actual mesh geometry is used for obstacles. for objects with a volume, make sure that the normals of the obstacle are calculated correctly, and radiating properly (use the mesh ‣ normals ‣ recalculate outside in mesh edit mode), particularly when using a spinned container. In the fluid boundary settings, uncheck remove air bubbles. with this setting checked (which is the default), the fluid sim will basically avoid to have any space between the fluid and an obstacle, thus preferring to pass through. Smaller cfl numbers result in more simulation steps per frame, longer simulation times but more accurate behavior at high velocities (e.g. fast fluid flow colliding with obstacle). Now, before anyone else says “why didn’t you use the search function.”, i’ve searched google and messed with blender for the last two hours trying to figure out this problem. increasing the resolution doesn’t seem to improve it, nor does manipulating any of the options on the object or the baking.
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