CFD setup options¶
Every setting on a Run's CFD Setup tab and in the CFD Attitude Setup dialog. For step-by-step instructions, see create a Run.
The CFD Setup tab¶
The tab has one column per Attitude and one row per setting.
- When you can edit. The pencil icon at the top of an Attitude's column opens CFD Attitude Setup. It only appears while the Attitude can still be launched: before its first launch, or after a Reset.
- Who sees the tab. It's hidden for restricted Users, and for Users whose settings hide CFD setup. The PostPro Setup tab is hidden for the same Users.
- Following-vehicle duplicates. Attitudes created for following vehicles aren't listed. They use the lead Attitude's setup.
Rows¶
| Row | Shown when | Shows |
|---|---|---|
| Methodology | Always | The methodology |
| Workflow | Always | The workflow |
| Mapped Inlet Source | Any Attitude uses a mapped-inlet workflow | The source, or "No Mapped Inlet source Selected" |
| Template Case | Always | The Template Case name and its buttons (see below) |
| Convert Half Car to Full Car | Your Account has the feature | ✓ or ✗ |
| Generate Underfloor Geometry | Your Account has the feature | ✓ or ✗, and the front and rear floor widths in mm |
| Mapped Solution Donor Case | Your Account has the fast-restart feature | A link to the donor Attitude, or - |
| Queue | A workflow in the Run offers more than one HPC queue | The queue, or "(Disabled queue)" if it's no longer available |
Comparison with the baseline¶
If the Run has a baseline, each Attitude is matched to the baseline Attitude with the same name. Where the methodology, workflow or Template Case differs, the cell shows the baseline's value in red, for example "(Baseline - v1806F)". Attitude not in Baseline means the baseline has no Attitude with that name.
Template Case buttons¶
| Button | Does |
|---|---|
| Edit / View | Opens the Template Case in the editor. It's View when the Template Case is locked |
| Validate | Opens Validate Template Case, which checks the Template Case against this Run's geometry |
| Create Copy | Copies the Template Case and assigns the copy to this Attitude. Only for Attitudes you can edit |
| Compare Template Case | Compares it with the baseline Attitude's Template Case. Only when they differ |
The name cell can also show: - "(Inactive Template Case)": the Template Case has been made inactive - "(Inaccessible Template Case)": your access rights don't include it
The CFD Attitude Setup dialog¶
Fields appear in this order. Methodology, Workflow and Template Case are always required, and Save stays disabled until the form is valid. Clicking outside the dialog closes it without saving.
| Field | Required | Shown when | Notes |
|---|---|---|---|
| Methodology | Yes | Always | The solver and version. Only methodologies with a workflow enabled for your Account are listed. Changing it clears Workflow |
| Workflow | Yes | Always | The type of solve, from the chosen methodology's workflows enabled for your Account. See methodology, workflow and Template Case |
| Mapped Inlet Source | Yes, for mapped-inlet workflows | The workflow is a mapped-inlet workflow | An exported inlet from another Attitude in the Programme, listed as "<attitude> - <inlet> - <base point>". Attitudes appear here after an Extra Exports job that includes a mapped inlet |
| Template Case | Yes | Always | Template Cases in the current Programme. Not filtered by methodology, so choose one that suits it |
| Enable Mapped Solution | No | Your Account has fast restart | Tick to start this Attitude from another case's solution (see below) |
| Mapped Solution Donor Case | No | Enable Mapped Solution is ticked | Choose the donor's Programme, Project and Attitude |
| Convert Half Car to Full Car | No | Your Account has the feature | Mirrors a half-car model to make a full car |
| Generate Underfloor Geometry | No | Your Account has the feature | Generates an underfloor (uf) zone. Asks for Front and Rear floor widths between the wheel arches, in mm |
| HPC Queue | No | The workflow offers more than one queue to your Account | With only one queue, it's selected for you and the field is hidden |
Mapped solution (fast restart)¶
For OpenFOAM methodologies, Mapped Solution Donor Case starts this Attitude's solve from the donor's latest solution, instead of initialising from scratch. Only Attitudes with a matching Attitude (the same Map entry) can be donors, and archived Attitudes aren't offered.
- The donor pickers are disabled for methodologies outside the OpenFoam Methodology Group.
- Save to All isn't available while Enable Mapped Solution is ticked, because donors are specific to each Attitude.
Convert Half Car to Full Car¶
At case creation, Bramble mirrors the geometry, kinematics and the Template Case's components, domain, exports and monitors to build a full-car model. An Attitude that uses a half-domain Template Case without this option is tagged Half Domain.
Generate Underfloor Geometry¶
When you tick this, Bramble checks the Run's geometry. It needs exactly one Part with an upper-bodywork zone
(body…) and no existing uf zone. Otherwise it shows one of these messages, and Save stays disabled:
- "An underfloor (uf) zone already exists in the model build"
- "No upper bodywork zones (body.*) exist in the current model build"
- "The current model build currently has multiple parts with upper bodywork zones (body.). To generate an underfloor only one part can have a (body.) zone."
Floor widths must be zero or positive numbers.
HPC Queue¶
The list shows the queues your Account can use for the chosen workflow. If an Attitude has no queue, or its queue is no longer available to your Account, Bramble uses your Account's default queue.
AWS workflows need AWS queues, and the other way round. If they don't match, the dialog warns: "The selected Workflow and Queue are Incompatible."
Saving¶
| Button | Does |
|---|---|
| Save | Saves this Attitude. Pressing Enter does the same |
| Save to All | In the Save menu when more than one Attitude can be edited. Applies the same setup to every editable Attitude |
| Cancel | Closes without saving |
Messages: "CFD Setup updated" when the save succeeds, "Could not update CFD Setup" when it fails.
Defaults for new Attitudes¶
A new Attitude's setup is copied from the first of these that exists:
- the matching Attitude in the Run's baseline
- the same Attitude in the latest other Run in the Project that uses the same Map
- any Attitude in the baseline Run
- any Attitude in the latest Run that uses the same Map
- another Attitude in the same Run
If none exist, only the Programme's first Template Case is filled in, and you choose the methodology and workflow.
Account features¶
Some options only appear when a feature is enabled for your Account. To have one enabled, contact support@bramblecfd.com.
| Feature | Adds |
|---|---|
| Mapped inlets | Mapped Inlet Source for mapped-inlet workflows |
| Fast restart | Enable Mapped Solution and Mapped Solution Donor Case |
| Convert half-car | Convert Half Car to Full Car |
| Generate underfloor | Generate Underfloor Geometry |
Related: Create a Run · Methodology, workflow and Template Case · Statuses and lifecycle