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SC/Tetra

The SC/Tetra preprocessor is used to prepare the geometry data for computation. It generates the computational mesh and defines boundary conditions. SC/Tetra's pre-processor is equipped with an intuitive graphical user interface (GUI) with Wizard based condition settings and CAD model repair functionality.

Mesh Generation

SC/Tetra uses an octant to specify the mesh resolution for a geometry and creates grids using the Advancing Front Method. It can create tetrahedron, pentahedron, and hexahedron elements. Prism layers can be inserted at walls to provide fine grid resolution in the boundary layer.

Mesh Generation

Adaptive Mesh Refinement

The Adaptive Mesh Refinement function can automatically refine the mesh resolution according to the calculation situation. It determines the gradients of velocity, pressure and temperature, and automatically refines the mesh to control the gradient magnitude An adaptive mesh can be automatically requested to provide satisfactory resolution with the least number of cells.

Adaptive Mesh Refinement

Condition Setting

SC/Tetra is general purpose CFD software so that it can be used to simulate many different physical phenomenon. In general, CFD software having many function options tends to be complicated and difficult to use. However, SC/Tetra uses a well organized Wizard to guide setting boundary conditions which simplifies the process.

The SC/Tetra version 7 Wizard enables the user to choose which phenomena will be simulated. It is enhanced to show only those items that are necessary for the chosen phenomena. This enables the user to set the condition without any confusion.

Each Wizard shows only regions to which certain condition can be applied. This also helps minimize input error.

CAD Data Repair Function

SC/Tetra can import 3D data in STL and DXF formats. If the 3D data has defects in it, a computational mesh cannot be created. The SC/Tetra pre-processor contains powerful geometry diagnostic and repair functionality that rival 3rd party grid generation software. Cradle's CADthru software product can be used to automatically repair of 3D models> CADthru b

SC/Tetra version 7, it is equipped with a wrapping function that is capable of fixing errors in the CAD geometry with greater precision than can be achieved manually . This function can also be used to simplify the geometry.

Preprocessor Function List

Geometry data edit	CAD data interface	STL, DXF (3DFACE)
	Geometry and mesh data interface	ABAQUS(.inp) , ANSYS(.cdb) , Design Space(.dat) I-DEAS(.unv) , NASTRAN(.nas)
	Geometry modification functions	Detect / modify face overlap
		Detect / modify face intersection
		Detect / modify edge isolation
		Detect / modify fractional edges and faces
		Wrapping(outside/inside), Recover missing faces
	Geometry alteration functions	Create analysis boundaries (cuboid and cylinder)
		Create surface by edge sweep
		Extract vertices / ridges
Mesh generation	Automatic mesh generation by Advancing Front Method
	Element generation by surface sweep
	Prism layer insertion
Analysis condition setting	Easy set-up through Wizard
Operation and control environment	Consecutive execution : batch processing from surface mesh generation to solver execution
	Macro for user operations (history function)
	Customizable keyboard mapping

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