Fluid Simulator: odd behaviour. Cache problem? First of all: I am new to Blender. I installed it today. After a few basic things I wanted to try out the fluid simulator. The first simulation worked fine, just like in that tutorial. The simplest of setups: a not-too-big-sized cube as the domain, a small sube as the fluid. Baked it and watched the finished preview.

Then I started over (Ctrl+N), took the default cube and enlarged it a little bit. As soon as I changed the type of that cube to "domain", it took the shape of the former fluid cube. After I deleted the fluid-cache files manually, the cube stayed the way it was when I changed the type to domain.

Is this a normal behaviour?

And it obviously isn't enough to delete the fluid-cache files. After I hit "bake", the domain cube immediately changed its shape to the first fluid cube and stayed the entire simulation like this. It only "tried" to move a few mm, as it seems. Quittung the application and restarting it doesn't help. Somewhere the data from the first test-simulation remains somewhere on my system, which btw is a Win10 PC.

What am I doing wrong?
Data for fluid sims is saved to external files, if the current blend is not saved this will be in a temporary folder, it may also get a temporary path if the domain is created before saving the blend file, even if the simulation isn't baked before saving. While this should use a random path name generated each time blender is run, there is a chance of old temporary data being used, thinking it is the current sim data.

The path used for saving sim data can be found in the domain settings. You can change the path to prevent the old data being seen.



While other simulations provide options to clear the baked data, the current fluid sim does not.