Hello, Trying to perform a simple ‘variation of pressure drop with independent velocities’ campaign. I must use the Jackson-Johnson partial slip boundary but I am unable to select it. I’m able to change it by opening the .mfx code, but I’m not allowed/unsure how to add the associated parameters. ‘…

We try to enable/disable options depending on model selections to try to make sure model combinations are consistent. It is not always obvious why different widgets are disabled. If you hover over the fields, tool tips will appear providing more information. Hopefully that helps.

For some reason, you can’t modify it in the GUI, but you can modify the keyword ‘BC_JJ_PS’ if you open up the .mfx file in editor. 0 to turn it off, 1 to turn it on. After turning it on, you will be able to modify specularity and restitution coefficients. Someone had a similar issue to which I resp…

figured it out pls ignore. Had to use one of the non-algebraic formulations for viscous stress meodels under solids TFM settings

How to enable Jackson-Johnson Partial slip boundary. please let me know.

Please do not ask the same question on multiple threads, and please do not re-activate 3-year old threads to ask a new question. As Justin pointed out, the options are disabled for a reason. In this case, the GUI is not doing a great job of explaining why the option is disabled. I had to refer to…

[image] cgw: In this case, the GUI is not doing a great job of explaining why the option is disabled. I had to refer to the MFiX specification: I didn’t know this fact, sorry for the inconvenience, I thought there was already a question in the thread so I’m asking it here.

NETL Flow Science Software Support

Solids boundary conditions trouble

MFiX

kotler July 23, 2020, 1:44am 3