Keyword type: step
This option is used to prescribe boundary conditions for 3D-fluids calculations. This includes static temperature, velocity and static pressure.
The following degrees of freedom are being used:
If no *TRANSFORM card applied to the node at stake, the local directions coincide with the global ones.
Optional parameters are AMPLITUDE, TIME DELAY, and USER. Their meaning is the same as for the *BOUNDARY card.
The main differences with the *BOUNDARY card are:
In order to apply a fluid boundary condition to a surface the element set label underneath may be replaced by a surface name. In that case the face type label takes the value ``S'' without any number following.
Thus, the cards run like:
Example: *BOUNDARYF 22,S3,2,2,.1
assigns to degree of freedom two of local face 3 of element 22 the value 0.1. If no transformation applies this degree of freedom corresponds to the velocity in global y-direction.