Simulate cornering¶

A Corner Radius in the Map makes the flow curve round a corner, so the front and rear of the car see different flow angles, as they do in a real corner. You can combine it with yaw, roll and steer.

Before you start

Your Account needs the optional Map parameter Corner Radius. New Accounts have it. If yours doesn't, contact support@bramblecfd.com to have it added for your Account.
The Kinematic Setup's kinematic model needs a ground system that supports a corner radius: Ground, Ground Tracking Model, Ground Tracking Yaw Model or Ground Motorbike Model. Simple Ground doesn't. To check, click Edit Model next to Kinematic Model in the Kinematic Setup and look at its systems.

Set a corner radius¶

Open the Map editor: create a Map or edit an existing one.
Under Optional Parameters, tick Corner Radius. A Corner Radius column appears, in m or mm to match Map Units.
Enter a radius for each Attitude:
- Blank: the Kinematic Setup's default is used.
- Zero: straight flow, with no corner.
Set Yaw, Roll and Steer as needed for each Attitude.
Click Save, then use the Map in a Run with a suitable Kinematic Setup.

What Bramble does¶

The flow follows an arc round the corner centre, so the flow angle varies along the car.
With a corner radius, yaw is applied by rotating the domain rather than by changing the inlet flow direction.
Following vehicles are placed round the arc.

Which way does the car turn? A positive radius puts the corner centre on the model's −y side. See coordinate system and units.