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  • ANSYS 超算平台的使用

    CFD彩虹条
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    V

    @桑葚熟了 目前没有用这些集群了,天河没用过,北京超算云那边感觉服务和价格都还不错,EasyCAE这边很久之前用的了之前价格有点小贵,现在不清楚了。

  • OpenFOAM获取叶片表面压力系数曲线

    OpenFOAM
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    chengan.wangC

    搞定,输出叶片上的压力数据(不要选择internal mesh),用slice切一下,最后用plot data即可

  • 关于欧拉-拉格朗日方法

    Algorithm
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    小狗狗

    @星星星星晴 OpenFOAM中的DPM粒子追踪功能,在运动网格(ALE)上的支持并行计算吗?有没有什么限制?

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    @dzw05 耦合计算和单域计算的流体域是使用上面提到的模型求解,求解器则是不同的,一个是壁面导电耦合求解器,一个壁面是绝缘求解器。我的耦合也只是壁面和流体的电势耦合。

  • ICEM非结构网格的Max element问题

    Meshy
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    请教一个比较初级的问题,查了帮助文档没有找到想得到的答案。
    ICEM采用Octree方法划分非结构网格的时候,帮助文档和网上的一些教程中都写到:“建议全局网格参数设置中的Max element值要是2的幂”
    这里2的幂是指:2的正整数幂?2的正数幂?2的实数幂?
    实际测试过感觉比如填0.05啥的也可以划分,网格也确实要比2的密很多。所以想问下各位高手这里这个数值填写应该有什么经验或者规律呢?尤其是模型尺寸很小的话,有时候确实需要很小的尺寸啊~

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    X

    直接移动到cad原点就可以了吧,cad的原点很好找的呀

  • latex这个代码怎么省略

    CFD彩虹条
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    mark 一下

  • 计算流体力学软件研发工程师招聘

    CFD彩虹条
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    N

    央企中国电子信息集团所属企业长沙军民先进技术研究有限公司招聘
    数量:6人
    工作地点:长沙市
    岗位名称:流体计算软件研发工程师
    岗位要求:
    1、流体力学相关专业;
    2、熟悉GPU和CUDA编程;
    3、熟悉C++编程;
    以上三项条件满足二项即可,满足三项者优先录取,流体力学强相关专业者也可面谈。

    基本月薪待遇8K-15K,其他待遇面谈,特别优秀的硕士博士待遇还可以商谈。
    联系人:郭先生,18908480199
    bf037a90-2b9b-464c-83da-3b501a4e6431-image.png

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    最近看到一种说法,level set方程是简化版的相场方程,结合这三种方法在方程形式上非常相似,不知道从计算精度、计算量等方面来讲,这三个方法的优缺点有没有什么对比性结论?

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    李东岳

    理论上$\alpha$要么是0,要么是1,因此这个要么就是液相速度,要么就是气象速度,不过写成平均速度也一样,因为$\alpha$要么是0,要么是1

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    @李东岳 :146: :146: :146: ,谢谢李老师,醍醐灌顶

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    李东岳

    @tidedrinker 感谢分享!:xiexie:

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    K

    @千里之行 求问大神 如何改变状态方程 编写新的psi,比如说我的状态方程是dac29137-1ecb-4648-88ec-e27adc2aac6e-image.png 那我的psi应该是什么呢

  • 论坛搜索功能下线了?

    CFD彩虹条
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    @李东岳 我发了帖子之后才发现你之前发过通知了,不是催更,抱歉抱歉~:chitang:

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    @BlookCFD 解决了,受到下面代码的启发,即重复利用代码,更新边界名称即可

    p { solver GAMG; tolerance 1e-6; relTol 0; smoother GaussSeidel; nPreSweeps 0; nPostSweeps 2; cacheAgglomeration on; agglomerator faceAreaPair; nCellsInCoarsestLevel 100; mergeLevels 1; } pFinal { $p; relTol 0; } 最后的要实现结果如下图: forceCoeffs_object { // rhoInf - reference density // CofR - Centre of rotation // dragDir - Direction of drag coefficient // liftDir - Direction of lift coefficient // pitchAxis - Pitching moment axis // magUinf - free stream velocity magnitude // lRef - reference length // Aref - reference area type forceCoeffs; functionObjectLibs ("libforces.so"); //patches ("body1" "body2" "body3"); patches (C0); pName p; Uname U; rho rhoInf; rhoInf 1.0; //// Dump to file log true; CofR (0.0 0 0); liftDir (0 1 0); dragDir (1 0 0); pitchAxis (0 0 1); magUInf 1.0; lRef 1.0; // reference lenght for moments!!! Aref 2.0; // reference area 1 for 2d writeControl timeStep; writeInterval 1; } //监测新的边界条件,只需要重复利用代码,更新边界名称即可 C1 { $forceCoeffs_object patches (C1); }
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    李东岳

    @luomuliunian 大佬这个专业了

  • 充分发展流的意义是什么?

    Algorithm
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    C

    @李东岳 那理解了,谢谢李老师

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    李东岳

    @hurricane007 我去,忘了。。。这个我当时打算自建一个免费的计算中心。后来发现一直需要给客户装机,电力都放在那面了,这个自己用的一直没搞起来。

    我距离百亿市场只是因为电路容量不够 :136:

  • UCSD-SDSU 联合博士项目招生

    CFD彩虹条
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    Job description
    We provide the opportunity for the joint Ph.D. program between UCSD and SDSU.

    Research motivation
    Do you know that measurement in a turbulent environment has its own "sixth
    sense"? In fluid dynamical systems, measurements can be used to figure out
    events that happened far away from the probing location.
    Through state-of-art data assimilation techniques, we can trace back the origin
    of any information we have measured. We used this technique to locate the
    release of a pollution release, and reconstruct unknown flow fields from limited
    measurements.

    Are you self-motivated to do a Ph.D. in interdisciplinary researches about fluid
    dynamics, inverse problems, and optimization? We are looking for Ph.D. students
    that are willing to spend time studying in an encouraging and creative
    environment!

    There has been a long-hovering question about how to combine experimental
    measurements with numerical simulations. Especially in terms of designing a
    turbulence model that agrees with experimental studies. In addition, the design
    of sensor networks or sensor weighting can be optimized in terms of the amount
    of information obtained.
    In this Ph.D. project, you will develop novel simulation techniques that combine
    machine learning techniques with data assimilation.

    The required skills and preferred profile
    We are looking for self-motivated young researchers from mechanical
    engineering, aerospace engineering, computational physics, applied mathematics,
    or other closely related areas.

    Familiar with MATLAB and FORTRAN with MPI. C++ and python is a plus. Good conceptual understanding of calculus and linear algebra. Experience with simple machine learning algorithms. Good communication skills including presentation skills, academic writing
    with latex or word. Please note that the GRE is required for all JDP applicants and cannot be
    waived. Having a part-time hobby is a plus.

    Location
    Work is carried out in the Data Assimilation group at Aerospace Engineering, San Diego State University.
    We study various inverse problems in fluid dynamics using numerical simulations
    with the discrete adjoint operator.
    For further information, please visit us at
    https://qiwang.sdsu.edu/

    Information and application
    Interested applicants should visit
    https://www.engineering.sdsu.edu/admissions/jointdoc_areomech.aspx
    for more details about applying for the joint program.
    Meanwhile, please reach out to Qi Wang (qwang4@sdsu.edu), including:
    • A short description of your qualifications and motivation to apply for this
    position.
    • CV or resume.
    • Transcripts from your Bachelor and Master degrees.
    Selected candidates will be invited to an interview and should prepare a
    scientific presentation as part of the requirements.

    We highly value diversity at our university. Applicants from all backgrounds are
    welcomed.

  • 分享Matlab读取Fluent数据代码

    Fluent
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    waltenW

    @西湖冷月
    nice兄弟,d=====( ̄▽ ̄*)b