ADM-201 dump PMP dumps pdf SSCP exam materials CBAP exam sample questions

用Clebsch图对流体流可视化分析 – 译学馆
未登陆,请登陆后再发表信息
最新评论 (0)
播放视频

用Clebsch图对流体流可视化分析

Visualizing Fluid Flow With Clebsch Maps | Two Minute Papers #170

亲爱的学霸们 这里是由Károly Zsolnai-Fehér带来的两分钟论文
Dear Fellow Scholars, this is Two Minute Papers with Károly Zsolnai-Fehér.
每个看过这个系列视频的都知道在众多科学议题中
Everyone who watches this series knows that among many other scientific topics,
我最着迷于流体可视化模拟今天 是时候再说说相关论文啦
I am severely addicted to fluid simulations, and today, it’s time to relapse!
这一次 我们将会用蜂鸟进行风洞测试
And this time, we’re going to run wind tunnel tests on hummingbirds.
通常来说 当设计出一个新引擎 新飞机 甚至一部新手机时
Typically, when a new engine, airplane, or even a new phone is being designed,
我们都很想知道热流和损耗将会怎样
We’re interested in knowing how the heat flow and dissipation will look like,
最好是在设计一个东西时就能知道
preferably before we’re designing an object.
为此 我们往往进行一些虚拟风洞测试并优化我们的设计
To do so, we often run some virtual wind tunnel tests and optimize our design
直到我们对结果满意了
until we’re happy with the results.
接着 我们就能开始建造这些新东西
Then, we can proceed to build these new contraptions.
模拟压力分布和空气动力是一个大主题
Simulating the pressure distribution and aerodynamic forces is a large topic,
然而 将其结果可视化基本上跟编写出一个模拟器一样困难和需要充分的研究
however, visualizing these results is at least as well-studied and difficult as writing a simulator.
我们到底对什么感兴趣?
What is it exactly that we’re interested in?
即使我们有了基于粒子的直观模拟有数百万个粒子
Even if we have an intuitive particle-based simulation, millions and millions of particles,
很明显 我们不可能把每一个粒子的运动轨迹都展现出来
it is clearly impossible to show the path for every one of them.
基于网格的模拟则往往更难以可视化
Grid-based simulations are often even more challenging to visualize well.
那么我们应该如何选择哪些来进行可视化而选择隐藏哪些 不让它们在屏幕上显示出来
So how do we choose what to visualize and what not to show on the screen?
在这篇论文里 我们能见证一种新方法来对速度和旋涡场进行可视化
And in this paper, we can witness a new way of visualizing velocity and vorticity fields.
而这个可视化是在Clebsch图中进行的
And this visualization happens through Clebsch-maps.
我们在这个数学变换中创造一个球体
This is a mathematical transformation where we create a sphere,
球体上的一系列点与涡流线及其演变相符
and a set of points on this sphere correspond to vortex lines and their evolution over time.
不过 如果我们不是单挑点 而是选择球体上一整片区域
However, if instead of only points, we pick an entire region on this sphere,
你就能看到在南北极这里我们获得了涡管
as you can see the north and south pole regions here, we obtain vortex tubes.
在模拟中 这些涡管带来了旋涡信息的一个精确再现
These vortex tubes provide an accurate representation of the vorticity information within the simulation,
这是展现这样一个解法的精确度中一个罕见的实例
and this is one of the rare cases where the validity of such a solution can also be shown.
这真是一个疯狂的想法 我喜欢
Such a crazy idea, loving it!
有了这个 我们就能更好地理解蜂鸟翅膀周围的气流
And with this, we can get a better understanding of the air flow around the wings of a hummingbird,
但是我们也可以从之前美国航空航天总局的航空器数据组中了解更多
but we can also learn more from pre-existing NASA aircraft datasets.
来看一下这些令人难以置信的结果吧
Have a look at these incredible results.
在计算机绘图专业组大会上发布的一篇论文真是惊人的壮举
Publishing a paper at the SIGGRAPH conference is an incredible feat
这通常需要花费几个杰出人才数年的艰苦研究工作
that typically takes a few brilliant guys and several years of unbelievably hard work.
好吧 这显然对Albert Chern来说不是什么难题
Well, apparently this is not such a challenge for Albert Chern,
他是这篇论文和薛定谔的烟的论文的第一作者
who was also the first author of this and the Schrödinger’s Smoke paper
薛定谔的烟论文我们一年前说到过
just a year ago that we reported on.
他极其善于利用一些数学原理
He is doing incredible work at taking a piece of mathematical theory
在新领域中展现出非凡的用法
and showing remarkable applications of it in new areas
而我们压根就想不到原理从哪来
where we would think it doesn’t belong at all.
在视频简介栏中有这两篇论文的链接
The link is available in the video description, for both this and the previous works,
一定要去看看噢
make sure to have a look.
那里有许多写得非常精妙的数学运算看起来就像是另一个世界的一样
There is lots of beautifully written mathematics to be read there that seems to be from another world.
这真的是一次非常独特的体验
It’s a truly unique experience.
这篇论文说也可以看到源代码但我还没有找到
The paper reports that the source code is also available, but I was unable to find it yet.
如果你找到了一个公开实行的
If you have found a public implementation,
请告诉我一下我会把你提供的链接更新到我视频简介里
please let me know and I’ll update the video description with your link.
感谢你的观看和慷慨支持下期再见
Thanks for watching and for your generous support, and I’ll see you next time.

发表评论

译制信息
视频概述

在Clebsch图中利用球体南北极形成的涡管,对旋涡流进行可视化模拟

听录译者

收集自网络

翻译译者

One静茹

审核员

豆子

视频来源

https://www.youtube.com/watch?v=HUFh8cEDeII

相关推荐