Pulsatile Flow of the Fluid with the Flexible Particles through the Elastic Tube

1994 Fiscal Year Final Research Report Summary

• Project/Area Number: 05650156
• Research Category: Grant-in-Aid for General Scientific Research (C)
• Allocation Type: Single-year Grants
• Research Field: Fluid engineering
• Research Institution: Akita University, Mining College
• Principal Investigator: NAKAMURA Masahide Akita University, MIning College, Associate Professor, 鉱山学部, 助教授 (60172441)
• Project Period (FY): 1993 – 1994
• Keywords: Vibration Induced by the Fluid / Blood / Emulsion / Flexible Tube / Power Spectrum

Research Abstract

The vibrations of flexible tube induced by the steady and pulsatile flow of emulsion are studied experimentally. The emulsion contains the flexible particles (liquid drops) and this fluid is used as a substitute of blood because of a similar property to blood. The vibration of flexible tube and flow rate through the flexible tube are measured by using a high sensitive gapsensor and an electromagnetic flowmeter respecitively. The results are summarized as follows.
1. Steady flow
(1) The emulsion has an effect to decrease the amplitude of flexible tube in a high flow rate region. (2) Tow sharp peaks are found in the power spectrum. The position of these two peaks are hardly affected by the flow rate or the property of fluid through the flexible tube.
2. Pulsatile flow
(1) The emulsion has an effect to increase the pulsatile amplitude of the flexible tube due to the pulsation of flow rate. (2) In vicinity of the maximum and minimum points of the flow rate, the fluctuations of the flexible tube occurs suddenly.