Characteristics Applied to Body Volume
These characteristics can be created on the Computational space or on volumetric objects (both stationary and moving).
Characteristics of this type make it possible to determine:
- extreme values of a variable within the volume
- coordinates of the cells in which these extreme values appear
Info window for volumetric characteristics
In situations, when a solution "falls apart", it is necessary to analyse the solution to find problem areas within the calculation domain. It is possible to determine when and where the “collapse” of the solution occurs due to the fact that variables (pressure, temperature, density, Mach number, etc.) in some cells take on abnormally large/small values. When viewing the colour contours for these variables, the "bad" cells may not always be detectable with the naked eye. It is at times like these that Characteristics come to the rescue! Using Characteristics, it becomes possible to locate these cells and analyse what caused such values to be generated.
The volume of a characteristic applied to an object always differs from the true geometric volume of the object
When creating Characteristics, it is important to note that all cells that are intersected by the surface (or the object) are included in the characteristic’s calculation volume. Therefore, the calculation volume of Characteristics always slightly exceeds the volume of the object on which it is created.
Characteristics on a Moving Body
When creating Characteristics on the Imported object from which a Moving body is built, additional fields appear in the information window for the center of rotation, translational velocity, rotation speed, and the rotation matrix of the Moving body. If the body is in motion, these values are calculated and displayed. Otherwise, these strings are assigned a null value.
If you create a Characteristic on a Supergroup constructed from the surface of a moving body, then the fields related to the moving body that contain the calculated parameters of motion will be absent