Units However, appropriate units should be used to build the geometry. (Hint: try to keep the dimensions, di, of the geometry in the range 0. 01<d <100. This will reduce the possibility of floating point errors Any consistent system of units can be used CFX-4.3V4.3.1H CFX-4 Introductory Training(Dec 1999
CFX-4 Introductory Training (Dec 1999) 4 -6 CFX-4.3 V4.3.1H Units However, appropriate units should be used to build the geometry. (Hint: try to keep the dimensions, di , of the geometry in the range 0.01<di<100.) This will reduce the possibility of floating point errors. Any consistent system of units can be used
ABA TECHnoloG Steps in Geometry Creation Geometry build wire frame using points, curves, surfaces and solids Constraints define constraints for solids with area mismatch Patches define boundary conditions(inlet, outlet, walls) Mesh mesh all surfaces Analysis generate internal volume mesh and geo file CFX-4.3V4.3.1H CFX-4 Introductory Training(Dec 1999
CFX-4 Introductory Training (Dec 1999) 4 -7 CFX-4.3 V4.3.1H Steps in Geometry Creation - build wire frame using points, curves, surfaces, and solids. - define constraints for solids with area mismatch. - define boundary conditions (inlet, outlet, walls). - mesh all surfaces. -generate internal volume mesh and geo file. Geometry Constraints Patches Mesh Analysis
Geometry Building points(cyan青蓝色 curves (yellow) vector function of a parametric variable points created implicitly when constructing curves surfaces, and solids not necessary to construct explicit points and then higher order entities note differences between explicit curves and implicit edges CFX-4.3V4.3.1H CFX-4 Introductory Training(Dec 1999
CFX-4 Introductory Training (Dec 1999) 4 -8 CFX-4.3 V4.3.1H Geometry Building points (cyan青蓝色). curves (yellow) - vector function of a parametric variable - points created implicitly when constructing curves, surfaces, and solids - not necessary to construct explicit points and then higher order entities - note differences between explicit curves and implicit edges
Geometry Building simple surfaces(green) are composed of 4 edges and 4 vertices construct solids using simple surfaces only simple surfaces are meshed using the isomesher CFX-4.3V4.3.1H CFX-4 Introductory Training(Dec 1999
CFX-4 Introductory Training (Dec 1999) 4 -9 CFX-4.3 V4.3.1H Geometry Building simple surfaces (green) are composed of 4 edges and 4 vertices > construct solids using simple surfaces only > simple surfaces are meshed using the isomesher
Geometry Building solids(blue) characterized by a bounding set of surfaces 6 surfaces. 8 vertices parametric function of 3 variables(L,J, K) meshed with the isomesher non-parametric solids(B-rep) cannot be used to create a structured grid 4-10 CFX-4.3V4.3.1H CFX-4 Introductory Training(Dec 1999
CFX-4 Introductory Training (Dec 1999) 4 -10 CFX-4.3 V4.3.1H Geometry Building solids (blue) - characterized by a bounding set of surfaces - 6 surfaces, 8 vertices - parametric function of 3 variables (I,J,K) - meshed with the isomesher - non-parametric solids (B-rep) cannot be used to create a structured grid