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  • 边界条件引起的震荡

    Algorithm
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    李东岳

    0_1497945059409_2017-06-20 15-50-42屏幕截图.png

    震荡已经非常非常小了,

  • 搅拌反应器ICEM结构网格划分方式

    Meshy
    12
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    C

    @李东岳 好的,谢谢李老师耐心解答

  • 0 赞同
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    H

    @hustzzw 微信图片_20221101093137.png
    就像这个图中里面圆柱区域和外面圆环柱区域

  • 0 赞同
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    C

    @bestucan 嗯嗯,感谢大佬。检查过,check和Quallity其实都没有问题,再次感谢~

  • 0 赞同
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    Y

    @疯狂记笔记的小白 您好,现在这个问题不知您是否已经解决,我目前也遇到了这个问题,但是采用周期性边界又会破坏本身的出口条件,如您已解决,期待您的指点

  • 英语记录

    CFD彩虹条
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    李东岳

    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?

  • 指向壁面的面矢量计算方法

    OpenFOAM
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    李东岳

    在某些湍流模型中,需要计算指向壁面的面矢量,OpenFOAM提供几种计算方法,但这些方法还需要进行详细的测试。

    比如对于下面的2D管道,下图是采用meshWave方法计算的指向壁面的面矢量,可见是正确的。

    0_1535517133002_correct.jpg

    下图是采用Poisson方法计算的指向壁面的面矢量,管道中心的指向壁面的面矢量是错误的。

    0_1535517141915_noCorrect.jpg

  • Python

    Algorithm
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    Elibathe康E

    @arctan 非常感谢!

  • James Gerald McDonald

    CFD彩虹条
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    李东岳

    嗯 AP 很多AP都很强力 强力AP!

  • 这雨下的太大了

    CFD彩虹条
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    可能北京今天发誓的人有点多,老天看不过去了

  • Zalesak 问题

    OpenFOAM
    11
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    W

    Zalesak disk可以参考isoAdvector里面的算例配置:
    https://github.com/isoAdvector/isoAdvector/tree/master/OpenFOAM/run/prescribedU/notchedDiscInSolidBodyRotation

  • fluent计算微通道收敛不了

    Fluent
    1
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    D

    针对一个高度为3mm,宽度为1mm的矩形微通道,用fluent mesh 画网格后,在入口流速为0.3 0.4 m/s时,计算都可以收敛。但是当入口流速为0.5m/s时,计算收敛不了,这可能是什么原因导致的,尝试过增加网格数量也无效

  • 流固耦合时遇到的问题

    OpenFOAM
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    D

    @昝磊 在solid2中,你通过读取DT文件注册了volScalarField类型的DTsolid2,所以objectRegistry中并没有DT。你可以试试将DT文件改为DTsolid2。

  • Zalesak slotted disk设定

    OpenFOAM
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    M

    @winsway_zero这个问题解决了吗?

  • 0 赞同
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    M

    有大佬知道是什么原因么

  • 高阶精度数值方法学术报告

    CFD彩虹条
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    李东岳

    看起来挺有意思

    微信图片_20200619134942.jpg

  • 请教几个关于壁面函数的问题,谢谢

    Algorithm
    8
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    L

    @cfd-china link text!![alt text]0_1492654992588_QQ截图20170420102158.png 这是这个文献上说的在固壁上的条件;还有一篇文献直接在壁面设置为0了link text0_1492655090308_QQ截图20170420101901.png

  • 0 赞同
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    C

    @东岳 感谢李老师!

  • 0 赞同
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    李东岳

    不是很清楚你说的那种涡脱落现象。不过用户指南中我记得有一章曾经表示,大体意思为:“如果用稳态求解器模拟比较强的非稳态问题会出现残差的震荡”。

    能否附稳态求解涡街的文献?谢谢。

  • 并行计算入门求解

    Algorithm
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    Q

    @Kingkong 搜如下教材

    高性能计算并行编程技术_MPI并行程序设计_[都志辉]:非常适合入门
    Using MPI :结合上一个教材一起看
    Iterative Methods for Sparse Linear Systems [ Yousef Saad ] :介绍 deomain decomposition 的数学理论