Hello everyone,
I’m currently learning how to use MFIX-Exa, but I noticed that it doesn’t come with a graphical user interface (GUI). I’m wondering what the best practices are for using the software efficiently in this case. Are there any tools or workflows that experienced users recommend?
Additionally, I have some experience working with MFIX-DEM. Is it possible to convert or adapt MFIX-DEM case files for use in MFIX-Exa?
Any tips, documentation, or personal experiences you could share would be very helpful!
Thanks in advance for your support.
Best regards,
Like most text-based input file codes, the typical workflow is to start with an existing case that is similar to what you want and adapt it to exactly what you want. As a new user, that might be challenging especially with a code like MFIX-Exa where we don’t really have tutorials/demos/etc.
There is no automatic conversion utility from MFiX to MFIX-Exa. They are similar in name alone (personally, I wish they weren’t, but here we are).
Documentation is reasonably fleshed out but definitely missing in places. Please report anything you find missing/inaccurate/confusing on here.
What are you interested in setting up?
Hi, William
Thank you for the advice. I completely agree that starting from a similar case is the best approach.
Currently, I am trying to set up a simulation to study the segregation behavior of two particle species with different size distributions in a bubbling fluidized bed.
If there are any existing similar cases in MFIX-Exa that could serve as a reference for such simulations, I would greatly appreciate it if you could point me toward them.
Thank you again for your help!
A little while back we set up and tested the Goldschmidt segregation case. Would that work?
Yes, it’s very relevant to what I’m trying to simulate! The Goldschmidt segregation case is a classic benchmark for particle segregation, and having access to it would definitely help me get started quickly with MFIX-Exa.
Could you please let me know how I can set this up in MFIX-Exa?
Thanks again!
These files are over a year old, so they are stale. There is no README, so I will have to step back through them to see what I did exactly. I would like to do that before sharing, but our computer is down and I’m not sure when we’ll get it back. So here you go. I can tell you I must have run the inputs_umf_* for each the large and small particles. I can’t remember if we tuned the drag law or not. And the *.m scripts are octave post processing scripts, but I’m not sure if they dump out the data that’s plotted or not. I’ll have a look and maybe I’ll add this case to the little CFD-DEM regression harness I have going once HPC is restored.
mfix-exa-stuff-master-inputs_cfd-dem-goldschmidt.zip (163.2 KB)