In this tutorial, the cavitation characteristics of a hydrofoil is investigated and compared to experimental data. The capability for multi-dimensional simulation of cavitating flows is of critical importance for efficient design and performance of many engineering devices. Cavitation refers to the formation of vapor filled cavities at low pressure regions of a flow field and their subsequent implosion while passing through high pressure regions of the flow field. Their phenomenon generally is undesirable causing erosion of propellers, pumps and other solid bodies. They are however considered and used in a beneficial way for a number applications including ultrasonic cleaning, water purification, high speed underwater propulsion and even to produce high temperatures and pressures for initiating thermonuclear fusion reaction. 

Cavitation generally refers to the formation of vapor filled cavities at low pressure regions of a flow field and their subsequent implosion while passing through high pressure regions of the flow field. Their phenomenon generally is undesirable causing erosion of propellers, pumps and other solid bodies. They are however considered and used in a beneficial way for a number applications including ultrasonic cleaning, water purification, high speed underwater propulsion and even to produce high temperatures and pressures for initiating thermonuclear fusion reaction. Therefore, the capability for multi-dimensional simulation of cavitating flows is of critical importance for efficient design and performance of many engineering devices. In this tutorial, the cavitation characteristics of an axisymmetric sharp edged orifice is investigated and compared to some analytical predictions.

In this tutorial, the geometry of a bent pipe is optimized. The bent section of the pipe must provide 90-degree change of direction for a fluid flowing through it. The objective is to determine the bend radius “R” that provides the minimal (optimal) pressure drop through the pipe.

The objective of this tutorial is to find the optimum bend radius R such that the pressure drop in the pipe is minimum for given a two-dimensional pipe with fixed velocity inlet.

This tutorial demonstrates the generation of a 3D geometry model and its discretization into a 3D structured grid. A Tesla-type valve geometry is used for this demonstration.

The steady-state forward and reverse flow characteristics of a Tesla-type valve are investigated using CFD-ACE+. A Tesla-type valve is one of the no-moving-parts (NMP) type valves used in micropumps for microelectromechanical system (MEMS) devices.

This example shows flow results obtained for a fan spinning at 3485 RPM. The following approach was taken to simulate the fan. A ugrid user subroutine is used to rotate the fan and shroud grid as a solid body. The parametric inputs, time step size and the user subroutine combined to rotate the fan by 2 degrees every timestep. The blades of the fan were given a "grid velocity" BC and the shroud was set with a "user specified" zero velocity to simulate a stationary shroud.

Solutions obtained from CFD-ACE+ could be visualized and post-processed using CFD-VIEW. This tutorial uses CFD-ACE+ flow solution for a Tesla valve to introduce the user to several features available in CFD-VIEW.