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  • 翻到之前的基金申请拒信

    CFD彩虹条
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    李东岳

    不知道他们几千万的CFD算法研究经费都是怎么构成的 :143:

  • 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

  • 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.

  • 有会STAR-CCM、COMSOL、CFX的老铁么?

    CFD彩虹条
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    李东岳

    https://www.cfd-china.com/topic/5198

    参考这个帖子,有人可以做个STAR-CCM、COMSOL、CFX的算例么?

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    @xpqiu 在 请教如何减小yPlus值,在简单的dam break算例里 中说:

    @Sloan 多相流的不太好估计,只能尝试不同的值看看了。

    好的好的,我再试试看,谢谢!

  • twoPhaseEulerFoam的程序问题

    Algorithm
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    shurufa diu shi
    Could you please check the other terms? e.g., lift force

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    X

    测试出来了QAQ:
    𝐵𝑖𝑛 𝑓𝑟𝑎𝑐𝑡𝑖𝑜𝑛 𝑠𝑜𝑢𝑟𝑐𝑒=(𝐵𝑖𝑛 𝑓𝑟𝑎𝑐𝑡𝑖𝑜𝑛 𝑐ℎ𝑎𝑛𝑔𝑒×𝐶𝑢𝑟𝑟𝑒𝑛𝑡 𝑝ℎ𝑎𝑠𝑒 𝑣𝑜𝑙𝑢𝑚𝑒 𝑓𝑟𝑎𝑐𝑡𝑖𝑜𝑛)/(𝐶𝑒𝑙𝑙 𝑣𝑜𝑙𝑢𝑚𝑒 ×𝑇𝑖𝑚𝑒 𝑠𝑡𝑒𝑝 𝑠𝑖𝑧𝑒)

    Eg: Bin 1 bin fraction decrease 2% in 0.1s, cell volume is 0.001 m3, inclusion phase volume fraction is 1%

    322c153e-e638-4775-9e9a-4e0939981818-image.png
    2 is the number that we give fluent, 0.02 is actual bin fraction change.

  • interFoam 气泡升阻力计算

    OpenFOAM
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    李东岳

    interFoam是直接模拟,不能模化升力。
    双流体模型是模型化后的模型,可以模化升力。
    因此

    升力的方程表达式中出现气相与液相速度,这两者速度与interFoam控制方程中的速度有什么关联呢?

    二者毫无关系

  • 公式卡免费发放

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    已经收到了

  • 如何获取一个面上四个角点的坐标?

    OpenFOAM
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    A

    @马乔 好的,谢谢。 顺便问一下,这个auto是指什么?数据类型自动根据后面的指定嘛?

  • 如何理解PDE的弱解?

    Algorithm
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    @random_ran

    不满足微分方程,但是满足积分方程的解就是弱解吧。本来俩方程应该等价的。

    其实我觉得关键单不在于什么是弱解,而是这帮数学家为啥要引入弱解这个概念,我的理解是丫们发现物理上一些有意义的解不严格满足他们推导出来的微分方程,但是似乎又差得不多,然后整吧整吧搞出一个弱解的概念来。

    有点感觉想和稀泥。。。。

  • ANSYS2020字体太大,显示不全

    Fluent
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    我用了双屏,在15寸屏幕上也出现了这个问题: 在workbench里打开fluent的话,也是这样的,不用workbench的话,fluent不影响。 我通过调整window 系统的缩放与布局搞定了。 具体操作是 系统-> 设置 ->显示 缩放与布局 更改文本应用等项目的大小-> 100% . 然后就好了

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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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    3d408cf3-836a-4aef-bb0b-a370d462f7e5-image.png 如图,左边的上部是大气边界,右边是封闭壁面。如果不在左边画和右边一样的细网格,得到的网格质量很差。如果画了细网格,则计算速度很慢。有更好的处理方式吗

  • 关于叶片颤振相关后处理

    Fluent
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    我在利用CFX进行blade flutter分析时,在后处理过程中总是少一个气动功的变量,不知道是我哪里做错了,有大佬可以指点一下吗?谢谢

  • 2016目录

    Algorithm
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    .J..

    李博继续多出好文!

  • 导出网格数据

    Meshy
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    李东岳

    @禾斗石开 fluent

  • 测试----

    CFD彩虹条
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    @李东岳 噢噢,好的

  • ICEM版本问题

    Meshy
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    Y

    请问大家,有个ICEM19.4导出的.blk文件,在新版本(2022)中导入显示版本不匹配,但是.tin文件就可以,有没有什么好办法可以查看.blk文件?

  • CFD青年成长支持计划(2022)

    公告
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    我是南京航空航天大学航空学院2022级硕士研究生吴祥清,跟随张老师链接文本从事CFD研究,本人的主要研究方向为高速出入水,初步学习商软入门CFD现在准备编程写算法。查找学习资料了解到CFD中文网以及老师,所以想申请2022CFD青年成长支持计划,我目前正在使用LS-DYNA软件进行垂直破冰仿真,开始着手发相关论文。在本科期间接触流体力学便想深入了解这个专业,也申请了这个方向的研究生,如果论文写作顺利,便会在研究生二年级申请硕博连读,为国家军事建设贡献自己的一份力量。目前在上课之余也开始着手C++入门。但是CFD学习之路道阻且长,希望可以得到老师资助来更好的学习CFD。