/ALE/LINK/VEL

Engine Keyword With ALE links on grid velocities, given nodes are linked to the given main grid velocities. You can specify the direction or a combination of directions. This definition is only taken into account during the current run.

Format

/ALE/LINK/VEL/Iform/Keyword3/Keyword5

node_ID₁, node_ID₂

ID₁, ..., ID_n

Definition

Field	Contents	SI Unit Example
`Iform`	Formulation flag. = 0 (linear) $W_{N} = W_{M 1} + (W_{M 2} - W_{M 1}) \frac{1}{N + 1}$ = 1 (maximum) $W_{N} = W_{M 1}$ if $\| W_{M 1} \| > \| W_{M 2} \|$ $W_{N} = W_{M 2}$ if $\| W_{M 1} \| < \| W_{M 2} \|$ = -1 (minimum) $W_{N} = W_{M 1}$ if $\| W_{M 1} \| < \| W_{M 2} \|$ $W_{N} = W_{M 2}$ if $\| W_{M 1} \| > \| W_{M 2} \|$ (Integer)
`Keyword3`	A combination of X, Y, and Z: X, Y, Z, XY, XZ, and XYZ
`Keyword5`	GRNOD or NODES defines the way to provide secondary nodes.
`node_ID`₁	First main node number.
`node_ID`₂	Second main node number.
`ID`_i	Secondary node or node group identifiers (depending on `Keyword5`)

Comments

This card replaces /VEL/ALE (Obsolete) Engine card from previous versions.
Using formulation Iform=0 requires an ordered node list. Using Iform=0 with Keyword5=GRNOD also requires an unsortable node group (refer to /GRNOD/NODENS).
Radioss will superimpose the grid velocities if different ALE links are defined in both Starter and Engine for the same node.