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[2398629771]

Hi everyone,

I am running a Finite Element Analysis using ANSYS Workbench (LS-DYNA extension). I’ve encountered an issue where the exported .k file automatically includes the *CONTROL_BULK_VISCOSITY keyword, even though I haven't manually added this card in the outline tree.

This keyword is significantly affecting my simulation results. When I manually delete it from the .k file and run it via the solver manager, the results align perfectly with my expectations. However, I want to find a permanent way to disable or modify this within the Workbench interface to avoid manual editing every time.

My questions are:

Where is the setting located in Workbench to suppress or remove *CONTROL_BULK_VISCOSITY?

Is there a default setting or a Command Snippet that might be triggering this?

Any insights would be greatly appreciated. Thanks!

[Nanda]

Hello,

Please review this help document: 3.13.1. Modifying Default Solver Settings

Regards,

Nanda.

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[Dennis Chen]

You can disable everything (as shown above) and insert your own set of default database and control cards.  In a lot of ways, it is way easier to control and manage than the workbench Dyna settings. 

I think it is a just out of habit and perhaps beginner habit that everything should be a GUI based button or setting one changes, but over time, it is so much easier to just use direct inputs in text format.