Patent ID: 7430500
Filing Date: 2008-09-30
Classification: G06F

Abstract:
1. A method for numerical analysis of a flow field of incompressible viscous fluid, directly using V-CAD data, comprising the steps of: (A) dividing external data into a plurality of cells having boundaries orthogonal to each other, the external data including boundary data of an object that contacts incompressible viscous fluid; (B) classifying the divided cells into an internal cell positioned inside or outside the object and a boundary cell including the boundary data; (C) determining cut points in ridges of the boundary cell on the basis of the boundary data; (D) determining a polygon connecting the cut points to be cell internal data for the boundary face; (E) applying a cut cell finite volume method combined with a VOF method to a boundary of a flow field to analyze the flow field, wherein step (E) comprises the steps of wherein for a two-dimensional boundary cell, a governing equation in the finite volume method is expressed by a governing equation (7), wherein corresponds to the convection term, corresponds to the pressure gradient term, and corresponds to the diffusion term, wherein {right arrow over (u)} designates velocity of flow of viscous fluid, V designates differential volume of the viscous fluid, p{right arrow over (I)} designates pressure p of the viscous fluid along the {right arrow over (I)} vector, and Re corresponds to a non-dimensional Reynolds number; and (F) outputting to an output device a result of the method for numerical analysis of the flow field of incompressible viscous fluid, wherein the output device prints, or displays, or prints and displays, the result.