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    李东岳

    瞬态的话网格比较细的话,时间步长应该足够小

  • paraview后处理涡量出现值阶跃的问题

    OpenFOAM
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    J

    @李东岳 嗯嗯,这个应该没问题了,现在解决方案就是reconstructPar就效果很好了
    谢谢李老师!

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    bestucanB

    求解颗粒流有很多方法,成熟的方法fluent里有现成的就不用udf了。如果写udf当然看用什么方法了。

  • 论坛搜索功能下线了?

    CFD彩虹条
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    D

    @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:

  • Boundedness,Conservativeness.

    Algorithm
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    李东岳

    下图的变量越界了。红的过了上界。蓝色过了下界。
    解得纯对流方程,我这几年...一直在和有界和守恒作斗争 :big_mouth: :big_mouth:

    ......

    0_1512380644852_捕获.JPG

  • latex这个代码怎么省略

    CFD彩虹条
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    L

    mark 一下

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    W

    @anubis 集合重构不求解方程,而是通过通量变化计算体积分数,最后再进行界面重构。得到的体积分数必然是间断(指界面处发生跃变)的一个场。

  • UCSD-SDSU 联合博士项目招生

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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.

  • 关于涡的各种复数

    CFD彩虹条
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    bestucanB

    Screenshot_20211204_182532_cn.dictcn.android.digitize.oxford_oalecd9_17203.jpg

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    李东岳

    看起来确实没辙了

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    Mina LeeM

    https://github.com/louisgag/openFoam-Overset-SpeedUp

  • 哪位大佬用过投影仪看电视

    CFD彩虹条
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    李东岳

    @同学博 :jingya: 那我还不太知道。不知道这俩是不是一个东西。激光电视目前倒是销量比较差 :qichuang:

  • 有限体积法的强弱形式

    Algorithm
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    H

    @李东岳 大神,这个我真没注意。好像不多。我是土木专业的,不是搞固体力学的。您可以再找找。

  • toposet之后出现空集。。。

    OpenFOAM
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    @学流体的小明 在 toposet之后出现空集。。。 中说:

    感觉是topoSet选择网格,提取各种面的时候有些问题了,我没用过这方面的功能,不太了解。
    你如果只是想把边界面提取出来的话,在blockMesh当中就可以设置吧。

    @李东岳 在 toposet之后出现空集。。。 中说:

    豁牙子注意一下toposet点位置的精度。

    感谢两位大佬提点,豁牙子问题解决了...

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    bestucanB

    把define_source里你想用的量给赋给uds,然后在define_adjust里调用,这样的量还能在后处理里显示。或者粗鲁点,直接定义个全局变量,这里赋值那里读。

    你说的pri_th这是应该是这些源的名称,第一相第二相混合相。名称怎么变都行。他们起作用的时候是在计算的时候把他们选成谁的源。

  • UDF源码报错

    Fluent
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    我去试一哈,感谢大佬:146:

  • 论坛搜索功能挂了

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    李东岳

    论坛每天都有3 4万点击,一万多IP,也不知道啥时候处理好 :143:

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    L

    @李东岳 嗯,两个一起下下来就可以的,之前理解错了。

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    Z

    这个问题是在编译的时候,postProcessingWaves没有被编译,导致编译postProcessWvaes2Foam中无法正确使用该函数。

  • Tecplot处理叶轮内部相对速度

    Fluent
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    西湖冷月西

    @wseric 嗯嗯,fluent自带后处理是可以做的,但出的图不太好看,tecplot出图漂亮一点。目前,基本可以解决这个问题,就是速度三角形换算问题,公式推导出来编公式计算就行。