![]() Surface tension and sheetingĪre you trying to create a realistic small-scale fluid effect but your fluid just keeps breaking apart? Is your liquid behaving more like a large ocean rather than a small cup? You might want to try enabling the surface tension and sheeting features in the world panel! If your obstacle object is too thin, you will see holes, cracks, or other errors in the debug mesh where the fluid will leak out.ĭocumentation: FLIP Fluid Debug Panel 2. ![]() If your obstacle is not animated, you can stop baking after the first frame is completed and reload the frame to display the debug mesh. After enabling this option, you will need to begin baking the simulation to generate this debug mesh. This option will output a debug mesh that will show you how the add-on converts the obstacle and how it 'sees' the obstacle within the simulation. You can make sure that your obstacle is thick enough by either re-modeling your object walls to be thicker or by increasing simulation resolution.Īnother way to check that your obstacle will work well in your simulation is to set the Enable Obstacle Debugging checkbox. To prevent thin obstacles from leaking, the thinnest parts of the obstacle should be at least one grid cell thick. The grid display mode is interactive - try adjusting the domain resolution or scaling and resizing the domain to get a better understanding of how the grid changes. The size of a grid cell can be understood as the smallest amount of detail that will show up in your fluid simulation.Įxample: the smallest droplets, the thinnest splashes, and the minimum thickness of an obstacle. Right: after increasing grid resolution, the debug mesh is now fully resolved.Īfter enabling the Display Grid option, you will see a visualization of the simulation grid and how the grid is divided into cells. Left: a grid resolution that is too low, resulting in cracks in the debug mesh. Let's visualize the grid by turning on the Display Grid option in the debug panel. The FLIP Fluids add-on is a grid-based simulator where physics equations are solved on a 3D grid and the resolution value controls how detailed the grid is. The reason is likely that your model is too thin for your simulation resolution. ![]() What a mess! So.why is the fluid leaking? Let's take a common problem as an example: you have modeled a fantastic looking bottle or the most perfect mug Blender has ever seen but when you try to fill it up with your favorite liquid, you find that your fluid just leaks all over the place. Simulation debugging in FLIP Fluidsĭid you know that the debug features in FLIP Fluids can be used to diagnose and resolve issues in your simulation setup? By the way, if you prefer watching to reading, scroll all the way down for a video of Ryan and Dennis talking you through these top tips! 1. Ryan and Dennis from the FLIP Fluids development team show you how to quickly improve your workflow with their bestselling Blender add-on.
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