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  • ICEM 延伸切报错,提示找不到edge

    Meshy
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    iimp271I

    如图,报错提示找不到edge213 214
    b0083f92-0d11-4f6c-a54c-5290161735a9-380e52f758ab5917db2f5c22ab1bf81a.png

    但我选择的edge编号是213 214-1
    a7290fc7-3e13-4f61-a2c0-91abfa977032-a1c5e1665748315b0eba74a5a64ffe9a.png

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    @东岳 东岳老师,我可能没有表达清楚,您的意思是我的0文件夹中有一个O2的文件,然后这个C就是个符号而已,随意写,我在使用的时候就用C这个符号就好。
    同理只要我0文件夹中有一个叫做C(碳)的文件,随意定义一个符号a,把O2换成C就可以用a作为碳的浓度去计算?

  • 如何处理奇点

    CFD彩虹条
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    李东岳

    如果a/b 是一条曲线, b有的时候为0

    要根治的话,就是让b不为0

  • UDF编程求助,NV_DS是什么函数

    Fluent
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    Inked1_LI.jpg
    这个是fluent自带的udf帮助文件里面的一个例子,也用到了NV_DS,可以对于比一下

  • 粒子穿过可变形界面的问题

    CFD彩虹条
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    凤雏岂能消逝

    @bestucan 真的非常感谢您的建议。对于二维的case尝试了一下,我设置一个不变形的界面,进入filter区域的粒子数量大约是等同于流通量。但我手上的计算资源和代码的优化方面并不乐观,耗时久。如果界面变成可变形的情况,计算时间应该会加倍,时间上等不起。

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    ZY-GONGZ

    @李东岳
    已经看到了,非常感谢您:xiexie:

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    P

    英国谢菲尔德大学(The University of sheffield)Energy2050团队(http://energy2050.ac.uk)在招一个做CFD方向的全奖博士,做旋转填料床反应器捕捉二氧化碳的CFD仿真研究,对此职位感兴趣的研究生或者优秀本科毕业生可以申请(可直博),目前的申请截止日期是2022年7月22日(可能推迟),如来不及,入学时间可推迟到明年一月。

    谢菲尔德大学,世界百强名校,著名的CFD仿真软件Fluent的发源地,课题组学术氛围很好,适合静心搞科研。课题组在CFD领域有几十年的研究基础,在CCUS领域有丰富的研究资源,课题紧扣国内火热的"双碳"主题,该细分方向组里有7年的研究基础了,可以在前人的基础上接着做。

    具体招聘信息如下:
    We have a fully funded PhD studentship and look for applicants open to both UK and international students: Engineering doctorate (EngD): Predicting performance of intensified carbon capture inside rotating packed beds using CFD modelling

    If you know any good students from China, or the UK, please encourage them to apply.
    Any questions then let them to contact Professor Lin Ma: https://www.sheffield.ac.uk/mecheng/people/academic/lin-ma

    The advert is on findaphd.com: https://www.findaphd.com, search for the project 搜索 predicting performance of intensified carbon capture inside rotating packed beds using cfd modelling。

    或直接通过以下链接:https://www.findaphd.com/phds/project/engineering-doctorate-engd-predicting-performance-of-intensified-carbon-capture-inside-rotating-packed-beds-using-cfd-modelling/?p145128#opennewwindow

    Please make sure that they apply through the university of sheffield website: https://www.sheffield.ac.uk/postgraduate/phd/apply/applying.

    课题介绍:

    Carbon capture is considered the only technology able to decarbonise the hard-to-abate industries. many of these industries utilise legacy sites with little space for large new unit operations required in conventional carbon capture. rotating packed beds (RPB) look to solve this problem by intensifying carbon capture and reducing the footprint required by up to ten times, while also significantly decreasing the capital cost of these units. when combined with proprietary solvents, it is believed the cost of capture can be reduced to $30/tonne CO2 in some cases, helping to enable the rapid uptake of carbon capture and progression towards net zero.

    RPB are a novel technology that utilise the principles of process intensification to enhance the performance of mass transfer processes between fluids. given the application of rpb to the field of CO2 capture is relatively new, there is uncertainty regarding the impact of different process variables on the performance of the rpb that would otherwise require a significant amount of practical experimentation to investigate. computational fluid dynamics can enable the process to be accurately modelled, allowing for quick and inexpensive prediction of performance under various conditions.

    In this project a rotating packed bed absorber will be modelled in ansys fluent, with validation of the model’s outputs through use of the 1 tonnes of co2 per day (TPD) pilot-scale rotating packed bed absorber at the university of sheffield’s translational energy research centre. Initial research will involve investigating the impact of operational conditions and physical properties of the solvent on capture performance. As the project continues, the scope will widen to include sensitivity analysis of design parameters and the impact of scaling the RPB absorber on the existing project outputs and learnings. Additionally, further rotating unit operations could also be investigated.

    This project will utilise and develop your knowledge surrounding CFD modelling, mass and heat transfer, reaction kinetics and chemical equilibria. You will work closely with carbon clean, a global leader in the development of carbon capture technology and pioneers in the use of RPB for industrial decarbonisation. Your findings could directly impact the design and operation of commercial working carbon capture facilities, supporting the pathway to net zero.

    We are seeking applicants to start in september 2022.

    The project will be part of the EPSRC-supported centre for doctoral training in resilient decarbonised fuel energy systems. The student who undertakes it will be one of a cohort of over 50 students in a broad range of disciplines across the universities of sheffield, nottingham and cardiff.

    The research work will be based in the energy research group within the department of mechanical engineering and the translational energy research centre (TERC) at sheffield which is a brand new, high profile, innovation focused national research facility. You will be working within an exciting and dynamic group with approximately over 60 researchers undertaking a broad area of energy research with approximately three years' extensive research time in industry, preparing for high-level careers in the energy sector.

    Funding notes
    The studentship will cover full university fees and a tax-free, enhanced annual stipend of £20,352, including £16,062 (2022/2023) a year for four years and a stipend enhancement of £3,750 per annum.

    英国的全奖机会非常少,机会难得,欢迎各位优秀的CFDer申请!

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    S

    想问下这个职位还招人吗,谢谢!

  • openfoam 气动弹性

    OpenFOAM
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    李东岳

    取决于你对CFD算法的理解,如果是新手的话,比如没怎么做过算法的,应该需要一个博士的流程。对算法中等理解,1-2年,对算法比较熟,1年。这是非常槽的一个估算

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    李东岳

    @我是河滩 是的。

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    李东岳

    如何将coolingTower和atmosphere接壤的顶面、底面和侧面分开

    画个图,哪个是哪个?

  • 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。

  • 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:

  • k-e湍流模型的离散Susp是什么意思?

    OpenFOAM
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    @东岳 谢谢,我是得系统学学。

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    C

    为什么负值不对呀?你的压力在边界上还是你设置的那两个值么(outlet是0.002, outlet_sec是0.0015)?话说这两个值单位是Pa吧,为什么这么小?另外你的 pRefCell是0,pRefValue也是0,一般设置参考点和参考压力才比较常见,参考压力通常是大气压。

  • 转动模型dynamicFvMesh的变化

    OpenFOAM
    3
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    羽之下

    @东岳 谢谢东岳老师的回答,理解了。还有就是东岳老师考不考虑来武汉开课啊,上次跟老板提出来去北京学习openfoam课程,老板不大愿意啊,能来一次武汉授课就好了。:chigua:

  • ICEM导出inp文件出错?

    Meshy
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    J

    导出时候选择了如下这些选项
    image.png

  • 群体平衡模型适用性的问题

    Fluent
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    bestucanB

    能,模型是否适用和这个没太大关系,和状态有关系。
    如果流动特别慢都没有气泡,就不适用了。

  • Fluent多孔介质局部非热平衡问题

    Fluent
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    zousiyuZ

    @freeazma 如果我想在 fluent 里面同时查看/获取/输出固体和流体温度,能实现吗?

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    bestucanB

    报的错都没贴出来,人眼debug啊:135:

    从m_lg=0开始试,一项一项往里加东西,看加到哪一项出的问题