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    winsway_zeroW

    如果能实现顶盖驱动MAC算法,simple也没有问题啊~可以先试试MAC,速度边界条件都是第一类边界条件,其余都为0.只有顶盖有速度。

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    A

    @bestucan
    感谢您的回复!“不同方向的流动计算差异就大”这个解释很直接明了,我突然就有点明白这个网格线出现的原因了:xinxin:

  • 关于symmetryPlane的问题

    OpenFOAM
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    李东岳

    但这样你就无法附加除了zeroGradient的边界条件了?

  • EDC模型收敛问题

    Fluent
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    梦中飞翔的阿涛

    @bestucan 感谢,我先试试。

  • 代数方程组求解器中的smother为何物?

    OpenFOAM
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    J

    @李东岳
    谢谢东岳老师!明白是什么意思了!

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    李东岳

    Fortran 代码,令人感动

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    哦,这样啊,先看完这本书,再学新的。

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    C

    @ykk 方法自然是合适的,但是你需要确定你算的是对的,边界条件、数值格式啥的,而且瞬态模拟时间步长也需要关注。

    我比较好奇的是你是做了这种工况下的实验观测到了运动趋于平稳吗,有没有可能它就是不平稳呢?

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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:

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    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!

  • 压力出口计算结果为负压的原因?

    Fluent
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    D

    @李东岳 好的,谢谢老师,我再研究一下~

  • 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

  • Fluent中的VOF与组分运输模型

    Algorithm
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    老师们,使用VOF能模拟气液两相流,使用组分运输能模拟同相态的质量传递。
    请问, 能用VOF与组分运输,模拟气液两相流的传质吗?

  • .//Allrun文件

    OpenFOAM
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    C

    哪位老师能解答一下吗

    0_1520841411082_error.png

  • 矢量数组初始化

    OpenFOAM
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    Z

    再更贴一下,openfoam中矢量数组可以新建为矢量列表形式,初始化方法为List<vector> A(n,vector::zero),希望对和我用同样疑问的人有帮助

  • 三维中心对称的模型网格划分

    Fluent
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    梦中飞翔的阿涛

    @cccrrryyy 好的,谢谢,我试试

  • 数组变量边界条件的设置

    OpenFOAM
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    Y

    @李东岳 谢谢。我将原代码放入了另外一个求解器中就没有了这种问题,可能是路径的问题

  • 进程间数据不连续,openfoam中的MPI

    OpenFOAM
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    Z

    自己定义了一个类,如图,通过该类求解出来的数据在进程间不连续,我应该怎么写进程间的通信,有没有大神碰见过和我一样的问题,或者openfoam内有没有可以参考的MPI案例,求解答

    0_1521016902124_TIM截图20180314163901.png

  • 大家做模拟用MATLAB多吗?

    CFD彩虹条
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    P

    @jerry 来的有点晚了,下载不了了。能给个书名吗?谢谢

  • VIM 和 gedit的对齐

    OpenFOAM
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    李东岳

    @sungda 高手,默认为8,调节为4就好了 :quwan: