Blender FLIP Fluids - Surface tension comparison

In this video, "FLIP Fluids" addon surface tension is compared on 6 different simulation scenes and surface tension values. [HD | 60FPS]
We compare the same simulation with different surface tension values here:
00:03 - Small water drop
00:13 - Big water drop
00:23 - Water torus drop
00:33 - Inflow
00:43 - Water wall
00:53 - Mixing motor
We compare the different simulation with the same surface tension values here:
01:06 - Surface tension = 1.00
01:16 - Surface tension = 0.75
01:26 - Surface tension = 0.25
01:36 - Surface tension = 0.1
01:46 - Surface tension = 0.01
01:56 - Surface tension = 0.001
All videos are in 25% Slowmo 60FPS.
About each simulation:
Domain size: 1x1x1 (1m³)
Resolution: 100.
All simulations bake size: 309GB
Rendered extremely fast with E-Cycles lite.
Music:
opengameart.org

[@thevfxwizard7758]

I like how surface tension also acts as the apparent scale of the fluid.

[@spacekitt.n]

this saved a lot of people a lot of time

[@MeinCouch123]

Wow, you went above and beyond on this one- very useful information! Thank you!

[@DoctorMadness]

bless you for compiling this together

[@francescocalvi7096]

Thanks for taking your time to render these. Super helpful!

[@yossi_cohen]

Glad it was helpful!

[@activemotionpictures]

Thank you for sharing this research. So invaluable!

[@yossi_cohen]

My pleasure!

[@stevenchilders272]

I love good comparison videos like these

[@yossi_cohen]

Thanks

[@timpong2393]

you did a great job! thanks for save my time!

[@yossi_cohen]

Thanks Tim, you are invited to subscribe :).
My machine is now baking for almost 3 month (and there are about 2 more to go) a deep comparison of Surface tension vs. Viscosity (more than 30 different fluid simulations on high resolution)

[@adamd5618]

This video is very helpful

[@paulparoxid]

Thanks mate!

[@Bwaptz]

מדהים, תודה!

[@yossi_cohen]

על לא דבר!

[@MobyMotion]

Great work - thanks for posting. Is there some trick that lets you have multiple domains in the same scene, like baking one then baking another? Or is this using some trickery like video editing to look like multiple domains in the same scene?

[@yossi_cohen]

Glad you like it, I've exported the simulation to abc file (Alembic) and imported multiple alembic to the same scene so the render is for multiple fluid simulations in the same shot.
I'm honored to see you comment in my channel, your rigid body simulations were insperation to me and my first rigid body simulation was made after I've saw your tutorial. Thanks man!

[@MobyMotion]

Thanks for the answer - really helpful. And thanks for the nice comment! Keep up the good work

[@yuwong5850]

Very helpful

[@yossi_cohen]

Happy to help

[@MishimaZaibatsuCorp]

Subscribed!

[@yossi_cohen]

Thanks! Give greetings to Heihachi Mishima 😉

[@taka_tachibana]

Good ref. thanks

[@yossi_cohen]

Any time!

[@RecLab]

Thank you!

[@yossi_cohen]

You're welcome!

[@star-devil9157]

Wow really wow wow
The one and only ❤❣️❤❣️❤

[@yossi_cohen]

Thanks man

[@caturindrasukmana7673]

Thank you!!

[@yossi_cohen]

You're welcome!

[@dubbed6847]

Thanks 🔥👍

[@yossi_cohen]

Welcome 👍

[@Tarbard]

Good video sir

[@yossi_cohen]

Thanks

[@coolbluesky4078]

whoa this can be used for water in space or water in a hot pan

[@yossi_cohen]

Let your imagination fly

[@JavierMeseguerdePaz]

Awesome! Thanks for the detailed comparison! I was wondering, do you have the Blend files available to try to replicate exactly the same results?

[@yossi_cohen]

Hi Javier, I'm sorry but it is not so simple.
I've created each simulation separately, and after that exported the simulation as Alembic file (.abc)
After I had 36 simulation exported (as .abc files, 6 scenarios and 6 different ST for each scenario) I created a scene that uses 6 Alembic files. so I used the same abc files for the "same simulation with different surface tension values" clips and for the "different simulation with the same surface tension values" clips.
So the setup is too complex to share... the ABC files took more than 300GB so I've erased them long ago...

[@JavierMeseguerdePaz]

@@yossi_cohen Ah, I see! I was expecting a Blend file per sim or something similar. Well, the more reason to thank you for your efforts! This is a wonderful comparison.

[@doriflow_engine]

Thanks for the comparison. It is useful for flip people like us! How do you have variable surface tension within one domain? Or is it the post processing?

[@yossi_cohen]

Ive exported the domain (abc file) and after all the simulations are finished - put multiple abc files in the scene

[@doriflow_engine]

@@yossi_cohen Oh I see, so I assume you export the file after finish the baking, and then compile all the already baked abc file into the main one?

[@yossi_cohen]

@@doriflow_engine yep

[@doriflow_engine]

@@yossi_cohen Roger that!

[@arcangeel4828]

thanksss

[@yossi_cohen]

You're welcome!

[@supercalifragilisticex]

something about 1 is unsettling, I dont know why...

[@glencandle1772]

Very helpful thanks. What would you say is the defining difference between Surface Tension and Viscosity? I'm having trouble determining how much of one vs. the other I need for my honey-like sim.

[@Idarknesslmd]

IRL honey has a very low viscosity with high surface tension. Viscosity is the rate of flow, how fast does the liquid displace when on an incline. Surface tension is how well the liquid sticks together. Water has a very low surface tension (usually, there are exceptions) and very high viscosity.

[@glencandle1772]

@@Idarknesslmd In your explanation, is there an inverse relationship between the value in the viscosity setting, and the actual viscosity of a substance? Because the way I understand it, a lower viscosity value (in the FLIP Fluids addon) would be more water-like, however you are saying that water has a high viscosity.

[@Idarknesslmd]

@@glencandle1772 I had it right the first time and second guessed myself! I'm so sorry! I hope the following helps:
Water has a lower viscosity and surface tension compared to honey. Viscosity is a measure of a fluid's resistance to flow. Honey is thicker and more viscous than water because of its higher sugar content, which creates stronger intermolecular forces between the molecules. Surface tension is a measure of the amount of energy required to increase the surface area of a liquid. Honey has a higher surface tension than water due to the greater number of hydrogen bonds between its molecules. This causes honey to form droplets with a more distinct surface and to cling together more strongly.

[@yossi_cohen]

Great point!
I've dedicated a video (and some weeks for bake and render) with a detailed comparison on the subject: czcams.com/video/fTWTclF25VY/video.html.

[@yossi_cohen]

I've dedicated a video (and some weeks for bake and render) with a detailed comparison on the subject: czcams.com/video/fTWTclF25VY/video.html.
There are some other comparisons in my channel, enjoy.

[@shimengchen7666]

THXS A LOT! Which one is more like water? 0.1? I feel 1 is like jelly

[@yossi_cohen]

Maybe even less...

[@32rq]

I'm trying to recreate the torus (like at 0:23), and it's not closing like the high surface tension ones do in this sim. Any idea why? I'm using default settings, except for those mentioned in the video description.

[@yossi_cohen]

Are you using Flip fluids add on?

[@32rq]

@@yossi_cohen No, I was selecting "flip" from the fluid sim options. I'm guessing from your comment that's not the same?

[@yossi_cohen]

@@32rq no... Those simulations are made with FLIP fluids add on...

[@andrewphoto4750]

.01 the best

[@yossi_cohen]

It depends for what, blood? slime? oil?

[@Karthikcharan_ks]

Please tell me how you pre fill the water ...please tell me(0.042 to 0.049)

[@yossi_cohen]

Hi Karthik, I actually didn't understand your question... can you please explain?

[@BlenderRookie]

I wonder how high the surface tension would need to be to make it like a water balloon.

[@yossi_cohen]

I have another video that compare results of 49 simulations with different values of surface tension and viscosity

[@zergidrom4572]

0.1 looks most realistic for water, no ? )

[@yossi_cohen]

I'm not sure, something between 0.1 and 0.01...

[@Dreaweed]

Hi Where can I change the surface tension?

[@yossi_cohen]

Under the FLIP fluid world menu you can find it

[@user-qy6rf6nr9g]

Ххх ууу

[@yossi_cohen]

Yeah...🤭