CFX! Geometry 5.5V5.5.1H
CFX 5.5 V5.5.1H © 2001AEA Technology 3-1
CFX! Introduction Main objective: Build a viable domain(B-rep solids, cutout solids, simple solids) B-rep (boundary representation solids are composed of simple and/or trimmed surfaces Simple(parametric) solids have cubic topology Multiple solids must connect at whole faces Surface and face congruency and parameterization must be kept in mind or the mesh quality will suffer CFX5.5V5.5.1H o 2001AEA Technology
CFX 5.5 V5.5.1H © 2001AEA Technology 3-2 l Main Objective: Build a viable domain (B-rep solids, cutout solids, simple solids) l B-rep (Boundary Representation) solids are composed of simple and/or trimmed surfaces l Simple (Parametric) solids have cubic topology l Multiple solids must connect at whole faces l Surface and face congruency and parameterization must be kept in mind or the mesh quality will suffer
CFX释 Global model tolerance The global model tolerance is the criterion used to evaluate if there is a gap between two geometric entities Default tolerance is 0.005 This is an absolute geometric value(i.e. 1 m cube is accurate to 0.5 cm) A sensible override depends on model size and units For roughly unit geometry the default is reasonable For large geometry in mm a larger value is recommended and vice versa A sensible guide is 1/100 the length of the shortest edge length. CFX5.5V5.5.1H o 2001AEA Technology
CFX 5.5 V5.5.1H © 2001AEA Technology 3-3 l The Global Model tolerance is the criterion used to evaluate if there is a gap between two geometric entities. l Default tolerance is 0.005. l This is an absolute geometric value (i.e. 1 m cube is accurate to 0.5 cm). l A sensible override depends on model size and units. - For roughly unit geometry the default is reasonable. - For large geometry in mm a larger value is recommended, and vice versa. l A sensible guide is 1/100 the length of the shortest edge length
CFX! Geometric Entity: Point Geometry is constructed from the following entities Point(Cyan) CFX-Build creates points automatically when constructing curves. surfaces and solids N B. It is not necessary to construct higher order entities starting with lower order entities 3-4 5.5V5.5.1H
CFX 5.5 V5.5.1H © 2001AEA Technology 3-4 l Geometry is constructed from the following entities: - Point (Cyan). > CFX-Build creates points automatically when constructing curves, surfaces, and solids. N.B. It is not necessary to construct higher order entities starting with lower order entities
CFX! Geometry Entity: Curve · Curve( ellow) A Curve is a general vector function of a single parametric variable. It can have many types of mathematical forms 5.5V5.5.1H
CFX 5.5 V5.5.1H © 2001AEA Technology 3-5 l Curve (Yellow) - A Curve is a general vector function of a single parametric variable. It can have many types of mathematical forms x1