Ansys DesignModeler – Extrude, Revolve, Sweep & Skin/Loft

Extrude, Revolve, Sweep and Skin/Loft are the four operations that turn a sketch into a solid in DesignModeler. They differ only in how the profile travels through space.

Extrude pushes a sketch along a straight direction, which covers prisms, plates and most channels. Revolve spins it around an axis and is the natural choice for pipes, nozzles, tanks and anything axisymmetric. Sweep drives the profile along a path you define, so it handles bends, coils and curved ducts. Skin/Loft blends several profiles placed at different positions, which is what you need for transitions such as a round inlet ending in a rectangular outlet.

Each operation can add material, cut it, or produce a frozen body. In CFD work the cut and frozen options matter as much as the solid itself, since they are how you carve the fluid volume out of an assembly and keep the parts separate for meshing.