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  • 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:

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    @东岳 这个边界条件已经整合到exteranlHeatFluxTemperature里面了,算的也是温度梯度,也就是$q=-\kappa \frac{\partial T}{\partial n}$,这种边界按照FDS技术手册里面应该是DNS的计算方法。
    LES计算时给定的方法是$q=h \Delta T$,$h$是对流换热系数。openfoam里面的边界条件要么是固定值要么是梯度,这种差值不知道在of里面能不能实现

  • 有意思的CFD算法类研究

    Algorithm
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    李东岳

    可压缩PBE方程形式的比较

    咦、之前写的这个研究方向已经发出去了

    SuperBee好像就会锐化界面。

    Yes, SUPERBEE加了下风格式,是叫下风么?Down-wind

    哈哈,东岳大神,感谢你做了这个平台 ... 感觉学习CFD就是要不断地重复才能领悟其中的真谛,当然有通俗易懂的资料会更为便捷。

    @mohui 多谢支持,CFD任重道远比较耐玩!只要有兴趣,是能研究一辈子的,不像王者荣耀,玩几年到头了 哈哈 :mihu: 资料以后会持续更新,精力有限,稍微慢点

  • 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

  • of2006安装完找不到paraview和paraFoam

    OpenFOAM
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    V

    今天解决了这个问题
    先在$WM_THIRD_PARTY_DIR编译paraFoam并执行wmRefresh
    到$WM_PROJECT_DIR/modules/visualization路径下执行 ./Allwclean && ./Allwmake && wmRefresh
    转到$WM_PROJECT_DIR路径下执行 ./Allwmake && wmRefresh

    命令:

    cd $WM_THIRD_PARTY_DIR
    ./makeParaView
    wmRefresh

    cd $WM_PROJECT_DIR/modules/visualization
    ./Allwclean && ./Allwmake && wmRefresh

    cd $WM_PROJECT_DIR
    ./Allwmake && wmRefresh

  • 弹簧网格划分案例

    Meshy
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    A

    多谢老师解答,问题已经解决了

  • 数据文件格式FEPolygon转换FETriangle

    Meshy
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    Y

    你是不是想把曲面展开为一个平面?https://blog.csdn.net/mrbaolong/article/details/106949340

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    S

    我已经解决这个问题了,再IOdictionary里面用
    this->db().time().constant()

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    李东岳

    reFineMesh可以加密一个方向,这个需要指定区域,你试试topoSet+refineMesh呢》

  • SprayFoam的颗粒可以作为多组分的吗?

    OpenFOAM
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    @bestucan
    我做的是droplet,属于颗粒的。组分说的是这个droplet是一种溶液,只是我不清楚这里面的溶液到底算不算组分,溶液里面的水是可以蒸发的,溶质又无法蒸发,溶质跟溶液到底算不算俩种phase,还是按照同一种phase的不同组分来处理

  • 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.

  • 一些CFD的方程

    Algorithm
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    李东岳
    张量标识预习测验

    下面的方程取自各个不同的CFD教材。方程并没有采用代码的形式而是直接截图,这样更加直观的可以感受到文献里面方程这种多样性的书写方式。各位老师和同学需要能够拆分为分量形式。

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  • 质量入口概念问题

    Fluent
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    @a602657563 谢谢同志解答,你讲的很精炼,我同意你的观点,应该是这个笔者自己没弄清楚入口的概念问题,入口要么就是指定压力,要么就是指定速度,而且你讲的initial pressure很准确,只是给定一个初始条件值,而不是计算初始值。

  • incompatible fields for operation

    OpenFOAM
    3
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    H

    请问你解决了吗,我也遇到了相同的问题

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    李东岳

    额,自问自答?

  • VMware Ubuntu1804

    CFD彩虹条
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    李东岳

    @小火人 为什么不直接用绿色版paraview呢

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    L

    SPH-DEM是否适合做气液固三相搅拌

  • Fluent 气液两相流

    Fluent
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    C

    请问这个算例目前有什么可以分享的吗?印象中VOF算雾化之类的是不是不会特别准,因为那样你网格得画很小。感觉一个液滴的直径上怎么说至少要有3到5个网格才能比较准确的捕捉液滴的特征。

    另外你有考虑过DPM么。

  • 多面体网格的优劣?

    Meshy
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    多面体明显质量好过关 过基础计算关 相对正六面体 同样参数控制 数量变小了

  • ICEM 结构网格拓扑结构请教

    Meshy
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    A

    topo.png
    我需要用ICEM画multiblock网格,几何类似于上图的模型,我知道三角形Y-block和圆形O-block,那请问这两个如何结合起来呢?在这种结构中它的edge并不共用相同的vertices
    第二个问题是icem的multiblock的网格如何光顺?我尝试使用了pre-mesh smooth,但是这个功能很慢,容易卡死。我只知道可以用edit edge调整spline来改变edge形状,如果一个一个edge调是不是有点笨?