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  • 升力、曳力、虚拟质量力等

    Algorithm
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    L

    @东岳 我也在做测吹方面的研究,但是E-E有点算不起(因为我的吹入速度很大)东岳先生的结晶器图片我看过,很漂亮。

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    李东岳

    是的,我觉得,本质上,还是应该走看书 - 手算 - 编程这个过程,如果看书直接去编程,可能理不清思路。

  • Fluent虹吸VOF模拟

    Fluent
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    W

    不知道你这个模型的几何尺度。
    但这种情况可以考虑是否是由于接触角迟滞引起的。即当液滴脱离一个表面的时候,接触角不是一个固定值,有可能小于其在静态状态时候的接触角。

  • Not enough slots available

    OpenFOAM
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    ShaneHEEES

    @jacob-z

    mpirun --oversubscribe -np 20 xxFoam -parallel

    应该是进程超限锁死,需要添加申请允许超限,就可以了

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    C

    @liuxiaodong 如果不用周期性边界就可以用Fluent自带的那些入口了,为什么一定要用周期性边界呢?

  • S-A模型是如何处理湍动能k的?

    Algorithm
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    @wwzhao 嗯嗯,明白了,非常感谢您的解答!:xiexie: :xiexie:

  • LES FLUENT

    Fluent
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    C

    @李东岳 对哦,我审题不仔细,周期边界的话,哪来的入流。

  • 新的Ryzen有用过的吗?

    已移动 Algorithm
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    hurricane007H

    @东岳 过两天我测试一下6142

  • 带尖角的几何体怎怎么处理比较好

    Meshy
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    尖角可以用四面体,共节点,其他地方六面体,网格质量会很高

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    TongT

    又研究了一下明白了:如果手动添加各项异性的全隐式源项,
    需要拷贝一份A()并且构造成为张量,然后添加隐式源项,之后再构造HbyA,这样就能将各向异性的源线用全隐的方式添加到面通量上面了。

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    supersoldierS

    @liqiwen 还可以对结构网格进行二次开发, [基于FLUENT软件的导弹意外点火情况下舱室维护仿真平台开发

    ](http://d.g.wanfangdata.com.cn/Thesis_D429353.aspx)这个论文的3.1.2节有讲用index来对ICEM CFD二次开发的功能。

  • UCSD-SDSU 联合博士项目招生

    CFD彩虹条
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    O

    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.

  • CFD青年成长支持计划(2021)

    公告
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    F

    想问一下李老师这个计划还有吗!!很想要这本湍流模型:mianmo:

  • Fluent meshing wrapper边界条件是什么?

    Fluent
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    D

    各位CFDer,大家好!
    最近我使用Fluent meshing画网格,在管道的过渡区域,自动生成一个wrapper的边界条件,鼠标点击下拉选项,这个wrapper会自动消失。请教一下是否有人遇到过这种情况,该wrapper在Fluent中会被如何处理?

    谢谢!!
    Screenshot_20210519_142423.jpg
    Screenshot_20210519_142401.jpg

  • 关于DPM中壁面边界Wall-Film

    Fluent
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    W

    wall film 涉及到rebound、splash、adhesion等物理过程,必然是只对液体起作用。

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    C

    @bestucan 谢谢老师,我试了下,还是不行~

    他是由于none量 他把它删了,看来我的问题就是那个omega,只要用

    const volScalarField& omega_ = ( this->mesh_.objectRegistry::template lookupObject<volScalarField>("omega") );

    就会找不到,估计是结构问题,难道只能重写了。

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    bestucanB

    @东岳 哦哦,话说劳动人民筛麦糠好像用的就是这个原理:quwan:

  • Starccm+DEM求助

    CFD彩虹条
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    在第一个时间步内生成了颗粒,怎么把颗粒的位置和尺寸并导出成表,并用表喷射器进行填充

  • 关于颗粒初始状态的设置

    Fluent
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    需要写一个file文件,可以自定义颗粒物的状态。关于file文件怎么写,可以参照fluent帮助文件

  • CFD青年成长支持计划(2022)

    公告
    87
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    216k 浏览

    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。