When do you think a simulation is complete?  Is it at the moment it finishes solving, or as soon as the postpro has generated? Or is it when someone has written a report?  In bramble, it is when an engineer ‘signs-off’ the case, putting their name against its lifecycle.

Signing-off a case lets other users know you have checked and analysed the result and found everything to be correct.

The Draft State

When a simulation finishes running on a cluster, bramble will first check the solution for any possible issues.  Failed convergence, or unrealistic pressures and velocities for example.  Assuming all is okay, it will then generate post-processing – images and movies showing the flow field.  When this completes, results will be available for users to view, however, they will be flagged as “Draft

Draft” tells all users know to treat this solution with caution – it has yet to be checked by someone.

The Completed State

The final stage in a simulation’s lifecycle is the ‘sign-off case’ action.  When the ‘Sign Off’ button is pressed, the user is shown a message box reminding them of the checks that should have been completed.

They should double check that they are happy with convergence and that the post-processing is generated and looks sensible.  They should also check that the changes they made in the test have an explainable aerodynamic effect.

CFD setup showing how easy it is to Adopt Open Source CFD with bramble
Pre Sign-Off Checks for CFD simulation workflow

You Name is Tagged

bramble will tag the user’s username into the lifecycle when the sign-off is completed.  This provides a permanent record of who check and analysed this run.

The simulation is now ‘complete’.

CFD setup showing how easy it is to Adopt Open Source CFD with bramble

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