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模拟水和泥石流 – 译学馆
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模拟水和泥石流

Simulating Water and Debris Flows

Dear Fellow Scholars, this is Two Minute Papers with Károly Zsolnai-Fehér.
亲爱的同行学者们 这里是卡罗莉·佐索奈·费尔的“两分钟论文”
We recently talked about an amazing paper
我们最近提到了一篇很棒的论文
that uses mixture theory to simulate the interaction of liquids and fabrics.
是关于使用混合理论来模拟液体和织物的相互作用的
And this new work is about simulating fluid flows
这项新工作是关于模拟
where we have some debris or other foreign particles in our liquids.
一些含有碎屑或其他异物的流体
This is really challenging.
这确实具有挑战性
For example, one of the key challenges is incorporating two-way coupling into this process.
例如 将双向耦合纳入该过程就是关键挑战之一
This means that the sand is allowed to have an effect on the fluid,
这意味着允许沙子对流体产生影响
but at the same time,as the fluid sloshes around, it also moves the sand particles within.
但是随着流体流动飞溅的同时 沙子也会在其中移动
Now,before you start wondering whether this is real footage or not,
现在 在您开始怀疑这是不是真实录像
the fact that this is a simulation should become clear now
您应该知道这是一个模拟
because what you see here in the background is where the movement of the two domains are shown in isolation.
因为你在背景中看到的是两个被隔绝的域的运动
Just look at how much interaction there is between the two.
只需看两个域之间有多少相互影响即可
Unbelievable.
真是神奇
Beautiful simulation, ice cream for your eyes.
精美的模拟效果 给您带来了视觉盛宴
This new method also contains a novel density correction step,
这种新方法还包含一个新颖的密度校正步骤
and if you watch closely here,you’ll notice why.
如果您在这里仔细观察 就会发现原因
Got it?
想到了嘛?
Let’s watch it again.
让我们再看一次
If we try to run this elastoplastic simulation for these two previous methods,
如果我们尝试针对前两种方法运行此弹塑性仿真
they introduce here again in density
这里的密度又一次增加了
or in other words,we end up with more stuff than we started with.
换句话说 我们最终得到的东西比开始时要多
These two rows show the number of particles in the simulation in the worst case scenario,
这两行显示了最坏情况下模拟中的粒子数量
and as you see,
正如您所见
some of these incorporate millions of particles for the fluid
其中一些包含数百万个用于流体的颗粒
and many hundreds of thousands for the sediment.
和数十万个用于沉积物的颗粒
Since this work uses the material point method,
由于这项工作使用了“物质点法”
which is a hybrid simulation technique that uses both particles and grids,
这是一种同时使用粒子和网格的混合仿真技术
the delta x row denotes the resolution of the simulation grid.
Δx行表示模拟网格的分辨率
Now since these grids are often used for 3D simulations,
现在 由于这些网格经常用于3D仿真
we need to raise the 256 and the 512 to the third power
因此我们需要将256和512提高到三次方
and with that, we get a simulation grid with up to hundreds of millions of points,
这样 我们得到的仿真网格最多具有数亿个点
and we haven’t even talked about the particle representation yet!
而我们甚至都没有谈到粒子呈现呢!
In the face of all of these challenges,
面对所有这些挑战
the simulator is able to compute one frame in a matter of minutes, and not hours or days,
仿真器能够在几分钟之内计算出一个框架 而不是数小时或数天内
which is an incredible feat.
这是令人难以置信的壮举
With this, I think it is easy to see that the computer graphics research is improving
据此 我认为很容易看出计算机图形学的研究正在
at a staggering pace.
以惊人的速度提高
What a time to be alive!
多好的时代啊!
If you enjoyed this episode,
如果你喜欢这期视频
please consider supporting us through Patreon
请通过Patreon支持我们
Our address is Patreon.com/TwoMinutePapers, or just click the link in the video description.
我们的地址是Patreon.com/TwoMinutePapers 或者点击视频描述中的链接
With this, we can make better videos for you.
这样 我们能为你制作出更好的视频
You can also get your name immortalized in the video description as a key supporter
你能让你的名字在视频描述中 作为一个重要支持者出现
or watch these videos earlier than others.
或者比其他人更早观看视频
Thanks for watching and for your generous support,
感谢观看和慷慨的支持
and I’ll see you next time!
下次视频再见

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使用新方法模拟含有杂质的流体

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视频来源

https://www.youtube.com/watch?v=CSQPD3oyvD8

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