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    李东岳

    这个软件使用的太少了。好像论坛也没什么人可以讨论 :134:

  • 为什么流体尚未到达的地方有速度?

    OpenFOAM
    5
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    xiezhuoyuX

    空的是指真空还是空气?
    空气就两相流(入口是water,计算域本来是air),真空就知识盲区了。

  • cfx-pre二维模拟没有三维模拟的结果好

    Meshy
    1
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    Y

    有大佬用cfx-pre算过二维旋转对称模型吗?我用二维旋转对称算的结果跟实验值相比差了蛮多,但用三维模型算的结果就对的上,但三维模型计算时间太长了,想用二维算。

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    @李东岳 光猫要是有端口转发功能的话,你可以转发端口到你的内部ip

    比如ssh 是22 于是你就转22号端口到你的本地机器192.168.1.111的22端口
    你在外网 ssh 就行,关键是转发

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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!

  • 0 赞同
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    A

    乒乓球带坑可能就变更更更贵了:tishizi:

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    I

    帧数如何?

  • 关于Zonal LES交界面设置的问题

    Fluent
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    两个面设置完交界面后会生成一个内部面,设置成rans-les-interface就可以了

  • 质量入口边界

    OpenFOAM
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    X

    @李东岳 在 质量入口边界 中说:

    你考虑的是多相流还是单相流

    李老师您好,感谢您的回复我考虑的是多相流,但是入口处只有气体,也只有气体进入

  • 初始速度场给定

    OpenFOAM
    10
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    C

    @fubianhanshu 你好可以加个联系方式吗,想请教一些问题

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    Z

    之前我使用VOF时也遇到进出口质量不守恒的情况,我们讨论可能是网格尺寸的问题,当网格过大,大于了一些小液滴或者小气泡的尺寸,网格就无法体现真实的两相分布,可能就会造成一些质量的消失

  • 在CFD-DEM耦合下N-S方程推导请教

    Algorithm
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    S

    推荐一本CFD-DEM基础书籍,感觉其中的unresolved CFD-DEM的理论公式说明比较清晰。
    Norouzi 等 - 2016 - Coupled CFD‐DEM Modeling: Formulation, Implementation and Application to Multiphase Flows

  • fluent多孔跳跃模型

    Fluent
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    Q

    不知道你遇见过没,第一个值太小比如-15次方,基本不以收敛,或者在多孔介质壁面上云图不连续,?

  • 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。

  • 0 赞同
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    K

    请问题主解决此问题了吗?

  • kvm也挺奇葩的

    CFD彩虹条
    2
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    李东岳

    买了个迈拓维矩的,这个可以切换,并且用起来目前来看还可以

  • 关于Gr数

    Algorithm
    1
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    Z

    我今天看一篇论文,一个简单的方形腔,通过添加金属颗粒来改变腔内相变材料的热性质。文中一个研究点是改变金属颗粒的体积分数,按理说相同的纳米颗粒体积分数下混合流体的热性质都是一样的,根据Gr数计算公式,Gr数不应该变化呀,但是相同的颗粒体积分数下文中又设置了10000与100000两个量级的Gr数,不知道怎么弄的,求大佬解惑。
    对了,我找遍那篇文章都没发现方形腔的物理尺寸,不知道这个与Gr的控制有没有关系

  • Centos7中Ansys Geomagic显示问题

    CFD彩虹条
    2
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    bestucanB

    启动的时候在启动命令后面加上后缀试试

    -driver x11
  • 输入公式方法

    已固定 Algorithm
    9
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    李东岳

    @coolhhh 厉害厉害!!

  • 非牛顿流体中动量方程的离散问题

    Fluent
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    G

    @东岳 好的,李老师,我先按照《computational methods for fluid dynamics》这本书上说的那种把这一项也处理成梯度的形式试着去推导一下,看能否推导出来