Moving Cell Zone

This is a motion where the entire computational domain or the interior of the cell zone moves, without any deformation of the mesh. The existing Sliding Mesh motion corresponds to this, and the Sliding Mesh section previously defined in the Cell Zone Condition has been removed and integrated here.

Motion only within the Cell Zone

The figure below shows an object inside a spherical cell zone rotating about two axes.

The figure below shows two elongated cylindrical cell zones inside a large rotating cell zone, with each rotating in opposite directions.

Motion of the entire computational domain

Sloshing tank – Oscillating Linear Motion : This refers to the behavior of the internal liquid when a tank partially filled reciprocates from side to side.

Moving Boundary

Implements the movement of the boundary mesh. Linear motion, rotational motion, and coordinate-based settings are possible. As the boundary moves, the internal volume mesh also deforms.

Rigid Body Dynamics

This is a method that allows the application of various dynamic laws to the motion of rigid bodies. It can implement 6 degree of freedom motion and multi-body motion.

Floating Object Rigid Body Motion

Turbulent Transition Langtry-Mentor 4 equation model

Support RANS-based turbulence model for predicting the transition from laminar to turbulent $\gamma$-$Re_{\theta}$ (kOmegaSSTLM).

The figure below is an example comparing the wall shear stress of SST $k-\omega$ model and transition model.

Local Cylindrical Velocity Inlet Boundary Condition

A Local Cylindrical Coordinate System has been added to the Velocity Inlet boundary condition. Swirl flow conditions can now be easily implemented by setting the axis center and direction and inputting axial velocity, radial velocity, and rotational velocity.

The figure below shows an example of a jet flow with swirl velocity components.

Temperature Profile

Previously, the fixed temperature of the wall had to be set as a constant, but now it is possible to provide a spatial distribution. Similarly, the temperature condition at the inlet boundary, which could only be set as a constant or varied over time, can now also be provided as a spatial distribution.

The figure below simulates the natural convection phenomenon when non-uniform temperature conditions are applied to a sphere.

Fan Boundary Condition Improvement

For fan boundary conditions within the computational domain, the direction of the flow could not be known until the calculation was performed when the fan performance curve was input. To resolve this issue, the flow direction was indicated by a ‘Zone Average Direction’ vector, and a ‘Reverse Fan Direction’ option was added to allow the direction to be reversed.

The figure below shows the change in flow direction when using the ‘Reverse Fan Direction’ option in the fan boundary condition problem from the baramFlow tutorial.