I would like to simulate a stream of water like the one in the picture, but I don't know how to simulate the fast-moving, white water.
Should I use particles to simulate foam or is it much better to concentrate in the material properties?
Thanks
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1$\begingroup$ I've tried 'Fluid' but it's totatlly not what you are looking for, then I've tried 'Particle System > Fluid' with a higher 'Timestamp' it was pretty ok until I increase amount of particles a lot and it's just went nuts. So my last try was with 'Smoke' and this was pretty (-10 temp in smoke flow) good but I cannot reproduce small flow radius at the top and wider at the bottom. $\endgroup$– cgslavCommented Aug 24, 2016 at 17:23
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1$\begingroup$ This guy does it pretty well but he not explain it too much: vimeo.com/70788800 $\endgroup$– cgslavCommented Aug 24, 2016 at 17:27
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1 Answer
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Result:
This is closest I can get with my PC.
Setup:
- Turn on Metric units.
- Create small Cylinder. 17x20x60cm with 6 sides.
- Press Space and find Quick Smoke.
- Resize domain to about 5x5x5m - big size prevent from gathering smoke around stream.
- Place everything like in the picture below.
- In Render Tab > Light Paths make sure Volume is greater then 0. Higher value will give smoother stream as light will bounce more in it.
Smoke Flow:
With Cylinder selected go to Physics Tab.
Change Temp. Diff. to -5. Lower value gives more speed.
Change Flow Source > Surface to 0.1.
Smoke Domain:
Change everything as in a picture.
You can increase resolution for more detailed stream.
Vorticity change turbulance in stream. In this case it's low because simulation is small in metrics.
Noise Method > Strenght control how wide stream will be at the bottom (higher value, wider stream).
Material:
Materials aren't my thingy so here is only a small modification to smoke base material. Play with Brightness/Contrast for stream color.
Blend file:
Final toughts:
I think that with higher resolution and better material you could achieve pretty realistic results and my answer will be good starter. In addition to this you can use particle > fluid for those little drops around stream.
