| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain high-accuracy analyzed results from a fluid simulator which simulates a fluid flowing around an object by improving the grid generating efficiency and actually calculating efficiency of the simulator. SOLUTION: A fluid simulator is provided with an I/F section 2 which transforms the external size data of an object into a prescribed data format of the UCD format, etc., with a 3D-CAD 1 as the central figure, an analytical data generating section 3 which automatically generates such a Descartes grid that its width becomes narrower stepwise at arbitrary intervals as the grid approaches the object in a space in an object to be analyzed based on the classification information of the 3D-CAD 1 by using the external size data of the object, and an analyzing section 4 which performs numerical analysis in a local collocation procedure at grid points in a prescribed region near the object by using grid data and the other analytical data and in a Descartes grid local collocation procedure using a differential method at the other grid points. The simulator is also provided with a displaying section 5 which visualizes the analyzed results. Thereby, the simulator can make grid generation and actual calculation in a short time and, at the same time, provides highly accurate analyzed result and can cope with the problem about the viscosity of a simulated fluid.</p> |
