高レイノルズ数領域でのビンガム塑性流体の脈動流れにおける壁面圧力変動

概要

論文の詳細を見る
Wall pressure fluctuations are measured experimentally regarding the pulsatile flow of Bingham plastic fluids in a high Reynolds number region. The wall pressure fluctuation is a very interesting quantity from a biomechanical viewpoint (causes of arterial damage) and from a practical viewpoint (causes of the fluctuating stress acting on a pipe). The experimental results are summarized as follows : (1) The rms (root mean square) of wall pressure fluctuation in the deceleration phase is greater than that in the acceleration phase for both the Newtonian fluid and Bingham plastic fluid. (2) The non-Newtonian property of the fluid increases the difference of the rms of wall pressure fluctuation between the acceleration phase and the deceleration phase. (3) The difference in power spectrum density between the acceleration phase and the deceleration phase is clear in the low-frequency region below 100 Hz.
社団法人日本機械学会の論文
1990-11-25