The ALE function (Arbitrary Lagrangian Eulerian for moving and/or rotating boundaries) in SC/Tetra is useful for analyzing fans, turbines, and pumps. This function can be applied to the steady calculation and the parallel computation.

### Axial Fan

Fluid flow analysis of an axial fan is challenging because the blade shape significantly affects performance. Accurate geometry representation and grid generation is critical. Starting from CAD data, SC/Tetra's automatic mesh generator can create the computational mesh in a matter of hours. In contrast, most conventional CFD software will require weeks to create the mesh. SC/Tetra simulates rotating blades using the rotating boundary (ALE) function. In addition, SC/Tetra perform a preliminary steady state analysis using only blade rotating forces.

### Sirocco Fan

SC/Tetra greatly reduces working hours for simulating a sirocco fan, as well as a propeller fan. A transient analysis using the ALE function (Arbitrary Lagrangian Eulerian for moving and/or rotating boundaries) can be used to provide more accurate details over and above a cursory steady state analysis.

### Blower

A blower moves the working fluid with rotating blades similar to other fans. SC/Tetra can model both gases and liquids.

### Turbofan (Turbine)

The shape and the number of blades greatly affect the performance of a turbofan. SC/Tetra can be used to evaluate several different cases in a short time because it is possible to build a model by changing only the rotating parts and its area.

### Vortex Blower

The internal flow of a vortex blower, which can rotate in either direction, contains a highly complex flow that can only be effectly visualized using CFD. CFD is useful for making this complicated flow visible and enabling the user to understand basic flow structure and physics.

### Mixed Flow Pump

For pumps as well as many fans, blade and housing shape greatly affects performance. SC/Tetra can model either gases or liquids as the working fluid.

### Multi-Stage Pump

The computation of the fluid flow through fans and turbines tends to take a long time because of the transient phenomenon that occurs between the rotating and stationary components. However, SC/Tetra possesses convenient functions design to facilitate these analyses. These include the axial symmetric condition, periodic boundary conditions, and treating the rotating force as a rotating object instead of simulating the actual rotation. These functions can greatly reduce the calculation time while still accurately simulating the physics.