tdynreference manual


Pre-processing

The first step for any analysis is the setting up of the problem. This includes the creation or importation from a CAD file of the problem's geometry (i.e. the control volume) the assignment of boundary and initial conditions, and the generation of the mesh. This will all be made in the PREPOST module of the Tdyn system (based on the Custom GiD system).

When setting up a new analysis for calculation with Tdyn, the specific Tdyn problemtype has to be loaded and assigned to the problem. This can be done at any point from the creation of the new file to the final definition of the geometry, but has to be performed before the user can proceed to assigning boundary conditions and other problem parameters. The problemtype assignment (Tdyn2D or Tdyn3D) is done by following the menu sequence shown in Figure 2.

Figure 2 Problemtype selection menu

Pre-processing part of the analysis consist of the following steps:

·        Conditions assignment

·        Materials definition

·        Boundaries definition

·        General problem data insertion

·        Solver data definition

·        Units definition

·        Mesh size assignment

·        Mesh Generation

The Tdyn icon bar has been designed to guide the user, during the pre-processing part of the analysis.