Tips & Tricks

Simulation of the Hypersonic Flow Past a Blunted Cone-cylinder-flare (HB-2) using CFD-FASTRAN

Study of supersonic flows is of high interest for a wide variety of problems including design of high speed planes and other related applications [1]. This user tip presents a validation of numerical methods against experimental data.

Transparency Feature in CFD-GEOM

In CFD-GEOM, certain entities can now be set to transparent. This option allows you to add transparency effects to your surfaces, faces, and volumes. This can be an excellent way to add shadows/colors and glass effects to the model.

Making it Easy to Add a Box Source in CFD-VisCART

Sources are used in CFD-VisCART to refine the grid in localized regions of the domain. One of the many types of sources available is the Box Source where the user specifies a cuboid box around the region a finer grid is required. In the earlier versions, the user would have to add a Box Source and then specify its X, Y and Z extents to position the box in the desired location.

Using the Construction Plane in CFD-GEOM

Point entities in CFD-GEOM are placed in an XYZ (Cartesian) coordinate system. The Construction Plane tool enables you to position a plane in space, and place points on that plane to generate curve entities.

Hole Detection Feature in CFD-VisCART

CFD-VisCART can handle geometries with small gaps, cracks and overlapping parts, but what if there is a big hole or opening in one of the parts that the user is not aware of? The grid will flow through this opening and the result will be a mesh that has cells both inside and outside the model. This leaves the user with the near impossible task of finding this opening. In CFD-VisCART, a Hole Detection feature has been introduced that performs this task for the user.

Distance Measuring Tool in CFD-VisCART

CFD-VisCART has a simple and easy-to-use tool for measuring the distance between two points in a geometry. This tool can be found under the Geom tab.

Clipping of X, Y, Z, Arbitrary Cuts and Iso-Surfaces in CFD-VIEW

In CFD-VIEW, performing X, Y, Z, arbitrary cut and iso-surface operations on volumes yield surface objects. One may desire to visualize and/or perform calculations in a user specified spatial range of the surface instead of the whole surface.

Blanking Option in CFD-VIEW for Visualizing Chimera Grids

CFD-FASTRAN uses closed surfaces, such as walls or blocked regions, to create Chimera holes (or blanked regions) in a grid. By default, the number of buffer layers is set to 1. This means that a closed surface will cut a hole in any mesh that overlaps it, and the initial "blanking" of grid cells defines the hole.

Using CFD-VIEW Display Types

When post processing a simulation in CFD-VIEW, you will often be working with multiple types of objects. Volumes and Surfaces are two types objects that you will most definitely have whether the model is 2D or 3D.

CFD-GEOM Viewer Hot Keys

Most of the time users deal with real world problems which are usually 3D. 3D geometries and grid generation can be difficult to mesh depending on the complexity of the geometry. Working with 3D geometry and grid generation can be made lot faster with effective use of the Hot Keys available in CFD-GEOM.