AM05-01-004 抵抗低減流の速度変動場に対する対イオン濃度の影響(乱流現象の制御・流れの抵抗低減1,一般講演)

概要

論文の詳細を見る
An experimental study has been performed in order to investigate the effect of counter-ion concentration on the flow fluctuation and time characteristics of drag-reducing cationic surfactant solution. The molar ratio of the counter-ion to cationic surfactant additives was changed from 1.5 to 100. From the results, the high fluctuating intensity is found to markedly decrease with the concentration of counter-ion. This flow laminarization occurrence is a main cause on the drag reduction occurrence. When the concentration of counter-ion increases, the relaxation time decreases down to 0.1s order. It is concluded that this time scale observed in the case of high concentration of counter-ion is deeply related to the drag reduction occurrence.
日本流体力学会の論文
2005-09-05