# Simulating Viscosity and Melting Fluids | Two Minute Papers #40

## Метаданные

- **Канал:** Two Minute Papers
- **YouTube:** https://www.youtube.com/watch?v=KgIrnR2O8KQ
- **Дата:** 24.01.2016
- **Длительность:** 1:48
- **Просмотры:** 18,353
- **Источник:** https://ekstraktznaniy.ru/video/14886

## Описание

In this series, we have studied fluid simulations extensively. But we haven't talked about one important quantity that describes a fluid, and this quantity is none other than viscosity. Viscosity means the resistance of a fluid against deformation. The large viscosity of honey makes it highly resistant to deformation, and this is responsible for its famous and beautiful coiling effect. Water, however, does not have a lot of objections against deformations, making it so easy to pour it into a glass. With this piece of work, it is possible to efficiently simulate the motion of fluids, and it supports the simulation of a large range of viscosities.

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The paper "An Implicit Viscosity Formulation for SPH Fluids" is available here:
http://cg.informatik.uni-freiburg.de/publications/2015_SIGGRAPH_viscousSPH.pdf

Recommended for you:
Painting with Fluid Simulations - https://www.youtube.com/watch?v=1aVSb-UbYWc
Modeling Colliding and Merging Fluids - https://www.youtub

## Транскрипт

### Segment 1 (00:00 - 01:00) []

Dear Fellow Scholars, this is Two Minute Papers with Károly Zsolnai-Fehér. In this series, we have studied fluid simulations extensively. But we haven't talked about one important quantity that describes a fluid, and this quantity is none other than viscosity. Viscosity means the resistance of a fluid against deformation. The large viscosity of honey makes it highly resistant to deformation, and this is responsible for its famous and beautiful coiling effect. Water, however, does not have a lot of objections against deformations, making it so easy to pour it into a glass. With this piece of work, it is possible to efficiently simulate the motion of fluids, and it supports the simulation of a large range of viscosities. Viscosities can also change in time. For instance, physicists know that raising the temperature will make the viscosity of fluids decrease, which leads to melting, therefore decreasing the viscosity in time will lead to a simulation result that looks exactly like melting. The technique also supports two-way coupling where the objects have effects on the fluid and vice versa. One can also put multiple fluids with different densities and viscosities into the same domain and see how they duke it out. This is exactly what people need in the industry: robust techniques that work for small and large scale simulations with multiple objects, and material settings that can possibly change in time. Thanks for watching and for your generous support, and I'll see you next time!