| 摘要 |
PROBLEM TO BE SOLVED: To show the error in a fluid analysis with a quantitative value. SOLUTION: A virtual substance advection calculating means 3 makes a advection calculation for the case that a virtual substance substantially having the diffusion coefficient 0 is mixed in a fluid given in the flow velocity field data 1 obtained as the numerical fluid analysis result, calculates the data on the concentration of the virtual substance, and estimates the error of the flow velocity field data 1 based on the change between the initial value of the concentration of the virtual substance and the value after the advection calculation. If the flow velocity field data 1 completely satisfy the basic equation, the concentration of the virtual substance is not changed after the advection calculation. If the flow velocity field data 1 do not satisfy the basic equation, the concentration of the virtual substance is changed after the advection calculation. The error of the flow velocity field data 1 can be quantitatively estimated based on the change level of the concentration of the virtual substance. |
