CFDEM®coupling - User Forum

Hello all,

I am planning to use dynamicMeshDict in the cfdemSolverPISO tutorial case (settingTestMPI) to induce mesh oscillation within the computational domain. However, despite my attempts, I have observed that the mesh does not appear to be moving as intended. Can you please provide me with insights on the correct usage of dynamicMeshDict for achieving mesh motion? I would appreciate your guidance and assistance regarding this matter.

kominami

Hello,

I'm trying to install CFDEM following the instructions in https://www.cfdem.com/media/CFDEM/docu/CFDEMcoupling_Manual.html#install...

I'm using Ubuntu 22.04 under windows 11.

However, in part "Setup and compile OpenFOAM®" there is no command foamSystemCheck (but there are others like foamVersion or foamSearch). Then I can execute the Allwmake without errors.

Hi CFDEM users,

Recently, I am conducting a CFDEM coupling to simulate the flow of smaller fine particles into the porous media under the pressure-driven fluid flow. However, I somehow observed the non-uniform pattern of the fluid flow as in some areas, the fines particles seem stuck and the flow seems less uniform in these areas. I am not sure why this happens? I initially thought that it might due to the communication errors between different processors so I changed the n_processors from 2 2 1 to 4 1 1. However, the problem still persists.

Hi everyone,

I'm doing investigations with the cfdemSolverIB. The solver runs quite fine!

Currently, I would like to write the eulerian force due to the immersed boundary.

Could anyone give me any hints on how to output the force field data?

Kind regards
Lisa

Dear Everyone,

I am writing a new solver that couples interfoam with cfdemsolverIB solver.
I have followed this paper "https://pubs.acs.org/doi/abs/10.1021/acs.iecr.0c00108" to build the solver.

Hi,
I am trying to use the cfdemSolverIB to conduct the resolved modeling. But I found the cfdemSolverIB results in huge memory usage. I used 24 cores with 96G memory, but only about 200 particles I can inject in my simulation. More particle injection will stop the simulation (memory use up). Very grateful for any clues why memory usage is so huge with cfdemSolverIB or/and how I can fix this issue.

Hello CFDEM community

In my case I need to model the settling of particles on a Filter.
Is it possible to represent a filter by a porous region through wihich particles do not diffuse?
Or are there any other possibilities to reduce the computational effort of Filter.

Thanks in advance
MCG

حمام اصلی شما یکی از گران‌ترین اتاق‌ها در هنگام ساخت (یا بازسازی) خانه‌تان است... بنابراین می‌خواهید مطمئن شوید که قبل از طراحی این اتاق واقعاً به آنچه می‌خواهید فکر می‌کنید! اجرای حمام مستر در شیراز اگر شما هم مثل من هستید، می خواهید حمام اصلی شما کاربردی باشد ... اما نمی خواهید زیبایی را قربانی کنید!

اجرای حمام مستر در شیراز

در زیر 9 نکته وجود دارد که به سؤالات شما پاسخ می دهد (مثلاً آیا به وان حمام نیاز دارم؟) اجرای حمام مستر در شیراز و همچنین به شما پیشنهاداتی می دهد که قبل از طراحی چیدمان اصلی حمام و انتخاب پایان طراحی خود چه مواردی را در نظر بگیرید.

I have created a particle growth simulation in LIGGGHTS using fix command:
fix ID group-ID insert/pack seed seed_value distributiontemplate dist-ID general_keywords general_values pack_keywords pack_values ...

I want to shrink the same particle. The growth that has already happened, I want to undo the process overtime again.

I don't understand how to proceed it.

Hello,

I have a planar x - wall which I want to represent with spherical particles. I wrote the following lines: