Configure pre-checks¶

Pre-checks catch set-up mistakes before a case uses HPC time. Each Attitude uses a checks template, a set of automated checks. You choose the template, review the results after launch, and decide whether to carry on. For what each check does, see the checks reference.

Choose a checks template¶

Change the template before you launch.

Open the Run and go to the Run Checks tab.
In the Checks Template row, click the pencil icon in the Attitude's column.
In Choose Checks Template, pick a template, then click either:
- Save to apply it to this Attitude only, or
- Save to all to apply it to every Attitude that hasn't been launched yet.

Changing the template resets that Attitude's check results to Pending.

Which template?

Situation	Template
A first or baseline Run	Baseline Checks (the default)
A geometry change compared with a baseline	Modification Checks. Adds mesh-recipe comparison and delta-geometry plots
As above, plus mesh level and layer plots	Modification Mesh Level Plots
New ride heights or Attitudes of an existing design, e.g. an aero map	New Attitude Checks. Re-checks wheel rotation, ground plane and balances
No pre-checks at all	No PreChecks

A new Run with a baseline starts with the baseline's template. Otherwise it starts with Baseline Checks.

If you need a custom template, contact support@bramblecfd.com. Templates can't be created or edited in the app.

Hold after pre-checks¶

By default, an Attitude waits after Pre-Checks so you can review the results before starting Mesh & Solve.

If your Account has the feature, the Run Checks tab has a Hold After Checks row. Untick it for an Attitude, and Mesh & Solve starts automatically as soon as every pre-check passes. An Attitude with a failed pre-check always stops.

Review the results¶

After Launch, each check row on the Run Checks tab shows Passed, Failed or Pending.

Failed checks list their problems under a bold heading, such as Compare Mesh Recipe, followed by the messages.
View buttons under a check open its plots, for example View total_F0 for a force-convergence plot.

Look at the pre-check plots.

In the Select Pre-check Plots row, choose a variable for one or more Attitudes, for example Geometry, Force Group, Mesh Refinement Level or Rotating: ….
Click Show Plots. Pre-check Plots opens with one image per Attitude.
Click a thumbnail on the left to change camera view. Drag to pan and scroll to zoom. The images stay in step with each other.
Use Show Grid Overlay to line features up, and Reset View to start again.

Clear Selections clears the variables you picked.

When a pre-check fails¶

A failed pre-check stops the Attitude before Mesh & Solve. On the Summary tab you can:

Fix the cause and run the checks again. Use Rerun Prechecks (below), or Reset the Attitude and launch it again.
Carry on anyway. If the failure is expected, for example a deliberate mesh-recipe change flagged by Compare Mesh Recipe, click Skip Failed Task. The stage shows "Skipped failed task", and you can start Mesh & Solve.

Rerun pre-checks¶

If your role allows it, the Pre-Checks row on the Summary tab has a Rerun Prechecks button. It's available once Pre-Checks has finished, as long as Mesh & Solve hasn't started.

Click Rerun Prechecks.
Optionally choose a different Checks Template.
Optionally expand Extra Deltas and add Attitudes to generate extra delta-geometry plots against.
Click Confirm.

Rerunning resets that Attitude's check results and runs Pre-Checks again.

After the solve¶

The Post-run checks row runs in the Check the CFD solution stage, after Mesh & Solve. It checks convergence, end time and the flow-field limits. If it fails:

Run-on, shown in the Mesh & Solve row when the workflow supports it, continues the solve for longer.
Skip Failed Task continues to post-processing if you're satisfied from the plots.