Initial Conditions Section

Initial conditions enable you to set the values of certain state variables at the start of a simulation. These variables help to define the base state of the model and might compensate for modeling omissions or inaccuracies.

Unlike restraints, which fix values during a simulation, the initial conditions are free to evolve from their base state during the simulation.

Initial Temperature
Defines the initial temperature of a body or fluid.
See Applying Initial Temperatures.
Initial Pressure
Defines the initial fluid pressure.
See Applying Initial Pressure.
Initial Velocity
Defines the initial fluid velocity.
See Applying Initial Velocities.
Initial Turbulence
Defines the initial turbulence in the fluid.
See Initial Turbulence.
Initial Mass Fractions
Defines the initial composition of a multispecies fluid using the relative mass of each component.
See Defining Initial Mass Fraction for a Multispecies Analysis.
Initial Fluid Fraction
Defines the initial composition of a multispecies fluid using the relative volume of each component.
See Defining Initial Fluid Fractions for a VOF Method Analysis.
Initial Rigid Body Velocity
Defines the initial velocity and rotational velocity of a rigid body.
See Defining Initial Rigid Body Velocity.
Import Initial Conditions
Defines the initial conditions from an existing result.
See About Initial Temperatures.