| 摘要 |
PROBLEM TO BE SOLVED: To improve the accuracy in the motion analysis of a non-compression fluid when a fluid is expressed as a group of particles by using a common proportional coefficient where the total becomes zero for the proportional coefficient of a motion equation and that of a non-compression conditional expression. SOLUTION: In a fluid motion analysis method, a non-compression fluid is expressed as a group of a plurality of particles (i). A motion equation including terms that are proportional to a pressure pi of each of the particles (i) and a non-compression conditional expression including terms that are proportional to a speed vi of each of the particles (i) are used. Then, a speed vi' and a pressure pi' of each of the particles (i) at time t+Δt after a time unit width ofΔt are obtained from the speed vi and the pressure pi of each of the particles (i) at time (t). A common proportional coefficient where the total reaches zero is used for the proportional coefficient of the motion equation and that of the non-compression conditional expression. The motion equation is expressed by an expression I, while the non-compression conditional expression is expressed by an expression II. Further, the common proportional constant may the one that satisfies an expression III.
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