Lorentz force is the force exerted on a charged particle in an electromagnetic field. Lorentz forces can be used to control flow separation. In the example of flow separation over a cylinder, the application of Lorentz force in a direction tangential to the surface of the cylinder results in moving the separation point rearward on the cylinder surface. This causes a reduction in the drag over the cylinder.

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.

User subroutines are built as Dynamic Link Libraries (DLL files for Windows) or shared objects (.so files for UNIX platforms). The shared libraries are then linked with CFD-ACE-SOLVER such that a two way communication between the solver and the user defined input is established. 

The turbulent flow past a NACA 0012 airfoil is modeled. The flow has a free-stream Mach number,M, of 0.55 at an angle of attack of 8.34 degrees. The Reynolds number, Re, of the flow, based on the chord length of the airfoil, is 9x 10⁶.

The problem to be simulated is the turbulent flow past a NACA-0012 airfoil. The flow has a free-stream Mach number, M, of 0.55 at an angle of attack, alpha, of 8.34 degrees. The Reynolds number, Re, of the flow, based on the chord length of the airfoil, is 9x10⁶. For this case, the flowfield develops a supersonic bubble near the leading edge of the airfoil upper surface. Furthermore, the flow is slightly separated at the foot of the shock that terminates the supersonic region. For this problem, the k-epsilon turbulence model is employed.

Transonic flow past a symmetric NACA 0012 airfoil is modeled for a free stream Mach number of 0.799 and an angle of attack of 2.26 degrees at 7000 m altitude. Two different meshes are considered. The first case is structured mesh with quadrilateral cells and the second case is unstructured triangular grids.

The objective of this tutorial is to understand the steps and methodology for creating unstructured grids. A simple 2-D plate (no thickness) is created and an unstructured grid is generated for it.

The near wall gridding is improved and modified through the use of sources and is demonstrated in this tutorial.