| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve calculation accuracy without prolonging the time of shadowing calculation during shape simulation. SOLUTION: An analysis area is divided into small cells, and every cell has a material composition ratio and the material surface shape is given at an equivalent surface of 0.5. While calculating the surface shadowing effect per a minute time, the in/out of a substance to/from the material surface is calculated, and the material composition ratio of every cell is updated every minute time. As for the shadowing calculation method, a shadowing effect is disregarded in only a cell adjacent to cells which calculate for in/out, or an ultra-highly accurate shadowing calculation is conducted in only an adjoining cell.</p> |
