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有一个东西 我知道 就叫做真空吸尘器
实在看不出真空的论点在哪里

I want to keep my bike close by, so I can fix it

I want to take off (remove) the bike wheel

Allen key

It doesn't fit

Move over, scoot over, can I get passed, please

She likes more and more like me everyday

I rarely (don't often) watch TV

Why did you set the temperature to 20 degrees

Dont rush me

I want to get rid of the extra oil

I can take some, I will finish what's left

She has a loose tooth, and its goin to fall out

She is not fully awake, she is a bit groggy

She is the one who loves me the most, she loves me the most

Put on the striped onesie

Move forwards and backwards

Her ton nail is broken

This is her first time seeing it

This drink is non-alcoholic, you can have a sip

Take a big step forward

A loose thread

Lift my leg and put it down

Stick out your tongue

She is lying on her side

I did it all in one go

Do you mind if I add her to our chat?

Please comment on the sentences above

Look at the lines on your arm. You leaned against something, that left lines on your arm.

Pull the handle to open the wardrobe

She just wants to be held up one your shoulder, she just wants to be held close to your chest

I am afraid of the dark

When she is sleeping, how does she know who is beside her

She does not care about anything, she is not easily bothered by things, she has high tolerance. I have a high pain tolerance.

If someone's ideas can be easily influenced by others,

She does not want to lean back

Give yourself a round of applause

Candy wrapper

I am meshing the pataya？？？

Are u scared of mosquitoes biting you?

Do you hear me calling you?

Another spoonful

How about I weigh you?

\begin{equation}
m_0=w_1+w_2
\end{equation}
\begin{equation}
m_1=z_1w_1\xi_1+z_2w_2\xi_2
\end{equation}
\begin{equation}
m_2=z_1^4w_1\xi_1^2+z_2^4w_2\xi_2^2
\end{equation}
\begin{equation}
m_3=z_1^9w_1\xi_1^3+z_2^9w_2\xi_2^3
\end{equation}
\begin{equation}
m_4=z_1^{16}w_1\xi_1^4+z_2^{16}w_2\xi_2^4
\end{equation}
\begin{equation}
m_5=z_1^{25}w_1\xi_1^5+z_2^{25}w_2\xi_2^5
\end{equation}
左边的$m$都已知，右边的6个未知数$z_1$, $z_2$, $w_1$, $w_2$, $\xi_1$, $\xi_2$需要求。

除了Newton-Raphson迭代方法？

Hi，

我们用方程举例：加入你要求解矩阵：
\begin{equation}
A \phi = b
\end{equation}
直接解法是不能用了大家都知道。一般采用迭代解法。在迭代解法中，如果对矩阵操作一下：
\begin{equation}
A = M-N
\end{equation}
替换到公式(1)中，就是
\begin{equation}
\phi^n = M^{-1} N \phi^{n-1} + M^{-1}b
\end{equation}
这种操作就是预条件，依据不同的M，有不同的预条件方法。OpenFOAM里面采用不完全LU分解。

smoother更倾向是多重网格矩阵求解器的内容，如图：
0_1458467715003_捕获.JPG
多重网格这块暂时还没涉及，以后有涉及随时补充。

推荐看这本书：Numerical Computation of Internal and External Flows - Volume I - Fundamentals of Numerical Discretization

你好，

看上文中的：

<<Writing ... non-orthogonal faces to set nonOrthoFaces

非矩形面和skewness面一般问题都不大，比价的话skewness不好的网格问题比非矩形网格更加严重。OpenFOAM里面已经把非矩形面的恭喜添加进去了，可以添加非矩形修正来处理。因此这是一个警告，不需要过多处理。有时候非矩形面试必须的。不可能避免。

当然你看到了他显示Mesh OK~

基类fvPatchField<Type>的snGrad()定义就是返回face normal gradient... 也就是$\nabla_{\perp}\phi=\nabla\phi\cdot\vec n $

@youmengtian
你用的什么显示器 :cheeky:

Hi,

这个问题很简单，举例：

1核计算需要24小时；

2核计算需要12小时；

4核计算需要6小时；

8核计算需要4小时；

16核计算需要3小时；

32核机选需要2小时；

64核计算需要1.5小时；

很明显，核多了会减小计算时间，但是在超过某个限制之后，就不会是线性的。并且，并行计算和CPU的通信关系很大，有些玩家自己组建的通过网卡连接的工作站，一个千兆网卡是必须的。

应该不会吧，我之前用的dell工作站，CPU是e5-2697v3，双路，windows系统，开了超线程，两颗CPU都可以调用，

网格数量太多了。15510 * 16000 * 22个网格？

毕超的《计算流体力学有限元方法及其编程详解》这本书里面详细介绍了方程各项的离散，不过使用MATLAB编写的，我现在主要就是参考这本书的

我最近也想配一台工作站，导师也不太懂就交给我自己来配了，我之前小打小闹配的第一台机器用的2950x觉得amd挺好的，看到新出的3990x觉得太香了，有没有大佬可以讨论一下具体怎么配置好呀，3990x怎么才能双路并行呀

@李东岳 谢谢李老师

@bestucan 在别人电脑上是正常的 ，很奇怪，我最后重装电脑解决了

@coolhhh 好的，谢谢大佬~

@李东岳 好的~谢谢东岳老师:xinxin:

用Vof 是算的气液两相吗？

可能是显示的问题，保存后，关闭，重新打开，查看一下是否正确。

Patch-filed function