Initial Condition
Initial conditions are the values of the variable temperature and fluids that are specified at the start of the simulation (time = 0). Depending on the solution type and the physics defined, the initial conditions tool will be updated to reflect the variables being solved in the simulation.
Temperature
An initial temperature for one or more bodies can be defined by enabling the Temperature initial condition. This option will be available only if the “Heat transfer” toggle is enabled in the Solution panel.
Fluid
This option helps to define and create the fluid (liquid and gas) regions inside the container. This is useful when the CAD or FE model does not have a separate body for the fluids (liquid and gas). The fluid option will be displayed based on single-phase (one fluid) and multiphase (two fluids) options in the Solution panel.
- By plane (or)
- By percentage of "Fluid1" in total volume (or)
- By "Fluid1" volume in litres.
By plane
"Define Fluid Level" helps to define a plane that separates the fluids (liquid and gas) and its normal points to the Fluid 1 region.
By percentage of "Fluid1" in total volume
It helps to generate the fluids based on the specified percentage of Fluid 1 volume.
The reference plane and the Fluid 1 region/gravity direction are defined using the "Define Gravity Direction By Plane" option.
By "Fluid1" volume in litres
It helps to generate the fluids based on the specified Fluid 1 volume in litres.
The reference plane and the Fluid 1 region/gravity direction are defined using the "Define Gravity Direction By Plane" option.
Here, the fluid level can be defined and the fluid generation will be handled in creating “SPH Particles”.
The resultant liquid and gas regions after particle creation are shown below,
