累積容積伝ぱ方程式による管内過渡的流れの三次元解析

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  • The Three-Dimensional Simulation for Transitional Flow in Pipe by The Propagation Equation of a Cumulative Flow Quantity.
  • ルイセキ ヨウセキデンパホウテイシキ ニ ヨル カン ナイ カトテキ ナガレ ノ 3ジゲン カイセキ

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In this paper, the following is mainly examined for simplifying the equations and shortening computational time, and improvements on the practicability are attempted. (1) The equations are established respectively even in both a compressed state and a void state because the cumulative increment quantity is used as the fundamental variable. (2) Cumulative increment quantity in the cube element is obtained from cumulative volumes which flow out of the six planes that constitute the element. It is necessary to obtain each dividing cumulative increment quantity difference of the adjacency element, in order to solve the equation of those cumulative volumes. The value was established respectivery as follows. (the dividing cumulative increment quantity difference) = (each of the cumulative increment quantity difference) ×(the largest cumulative increment quantity difference) / (the total of the cumulative increment quantity differences).

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