ビンガム塑性流体の高レイノルズ数領域における脈動流れ : 第1報,実験

概要

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The pulsatile flow of Bingham plastic fluids in a high Reynolds number region is studied experimentally. The fluid properties are measured with a modified capillary viscometer, whose capillary tube tip is immersed in the test fluid. An analysis based on the quasi-steady approximation is performed and the results are compared with the experimental ones. It is found in the range of the present study that : (1) the quasi-steady approximation is effective when the value of η (=√<ω*/Re^<3/4>>, ω* : square of Womersley number, Re : Reynolds number) is less than 0.3, (2) the measured time-averaged flow rate decreases compared with the one without the pulsation if the value of η is greater than 0.6 and this phenomenon can not be explained by the quasi-steady approximation.
一般社団法人日本機械学会の論文
1988-09-25