Planes/Probes

Output Planes control the timed and conditional export of visual simulation data (such as VTK slices, planes, particles, and free or moving surfaces) to support real-time animation and post-processing of flow and transport behavior.

Output Panel

General

Write Interval

s | Interval at which the plane/slice write will occur. This can be a system UDF.

Output Condition

Plane data can be output ad hoc at runtime. Use this expression to set the “output” variable to true at specific times.

Start Time

s | Start time of plane/slice writes.

Output

Time in seconds between VTK slice, surface, and particle output [Seconds]

Slice output refers to visual data output, including planes, particles, free surfaces, and moving surfaces. Slice data can be rendered as a movie or converted into a spreadsheet to analyze flow fields/transport.

In general, slice data should be output every 100–1000 timesteps to properly balance the computational cost associated with printing the data with the need for sufficient temporal resolution.

When producing real-time animations using slice, particle, or free surface data, the animation frame rate should match the Slice Output Interval value set here to produce a real-time animation.

Fluid Properties

▢ Velocity Magnitude [m/s]

▢ Velocity Vector [m/s]

▢ Time-Avgeraged Velocity Vector [m/s]

▢ Pressure [Pa]

▢ Density [kg/m^3]

▢ Fluid Viscosity [m^2/5]

▢ Volume Fraction [-]

Fluid Energy Cascade

▢ Total Kinetic Energy [J/kg]

▢ Time-Averaged Turbulent Kinetic Energy [J/kg]

▢ Energy Dissipation Rate [W/kg]

▢ Time-Averaged Energy Dissipation Rate [W/kg]

Fluid Kinematics

▢ Resolved Shear Stress [Pa]

▢ Time-Averaged Effective Shear Stress [Pa]

▢ Resolved Strain Rate [1/s]

▢ Resolved Strain Rate Tensor [1/s]

▢ Vorticity Magnitude [1/s]

▢ Vorticity Vector [1/s]

Mixing Properties

▢ Sub-Grid Turbulent Viscosity [m^2/s]

▢ Micromixing Timescale [s]

▢ Kolmogorov Length Scale [m]

Thermal Properties

▢ Temperature [K]

Custom Variables

▢ Mean Age [s]

▢ Porosity [-]

Scalar Fields

▢ Concentration [mol/L]

▢ Volume Fraction [-]

▢ Concentration [g/L]

▢ Diffusion Coefficient [m^2/s]