3.10 Initial Section

The Initial section defines all the initial conditions that may be applied to the analysis. An initial condition allows users to set the initial values of solution variables (e.g. velocity) as well as initialize the values of some special components.

An initial condition is defined via the ic element and requires the type attribute and node_set attribute. The type attribute defines the particular initial condition that will be applied. The node_set attribute defines the set of nodes that this initial condition affects. This node set must be defined in the Mesh section of the input file. Using implicit partitions (see section Implicit Partitions) surfaces, element sets, and part lists can also be assigned to the node_set attribute.

An optional name attribute can be defined to assign a unique name to the initial condition.

Example:

<ic name="ic01" type="velocity" node_set="set1">
<value>1,0,0</value>
</ic>