Incompressible subsonic flow past a two-dimensional backward-facing step is modeled to estimate the laminar reattachment length (i.e., the point where the separation bubble disappears on the channel floor behind the step). This is a step-by-step guided introductory tutorial for setting up a flow model in CFD-ACE+.

The steady state conductive heat transfer to the air-gap between infinitely long concentric thick-walled cylinders is modeled and compared with an analytical solution. This is a step-by-step guided introductory tutorial for setting up a heat transfer model in CFD-ACE+.

This is a 3D model of chemical binding kinetics in a millimeter-scale biosensor. The objective of the model is to investigate the effects of various kinetic parameters on the simulated response. A general objective of modeling such problems (not covered here) could be to evaluate the effectiveness of the mathematical model for extracting kinetic parameters from the sensogram.

Dielectrophoresis occurs because of the interaction between the induced dipole and the electric field. The interaction creates a net force, which depends on both the gradient of the electric field and electrical properties (permittivity and conductivity) of the particle and the media. The net force applies on partices, charged or not, and drives them to move. This technique can be used in the analysis, manipulation, and separation of cellular scale and nanometer scale particles like cells, DNA etc.

Bead based Immunoassays are very popular for clinical applications involving biochemical and biological detections. The geometry considered is a Y-junction employed in many micro-fluidic systems.

DNA Hybridization is a method for combining one strand of DNA sample against other (second) strand of DNA probe on a single support membrane. The degree of binding depends on the molecular geometries. The signal for a given geometry and kinetic parameters are evaluated in this tutorial.

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 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. 

This tutorial investigates the etching of an Aluminum surface due to Chlorine gas when a mixture of Argon (Ar) and Chlorine (Cl2) flows over an Aluminum substrate. Similiar reactors are used in semiconductor fabrication and MEMS applications.

Turbulent mixing is important in a wide variety of applications. One such application is high speed air breathing aircraft engines (supersonic combustion/hypersonic aircrafts). As aircrafts continue to fly at higher speeds, complete mixing has to be achieved within shorter combustion chambers to minimize fuel consumption,  avoid combustion instabilities and decrease emissions. The turbulent mixing of two streams of gases (propane and air) is modeled in this tutorial.