Analysis of capillary fluid flow rate by vibration on a small vessel model

In order to estimate the direct effect of the physical vibration on the peripheral blood flow rate, we measured the water flow rate in a silicon capillary tube whose end was vibrated. Three types of vibration were added to the tube and the frequency of the vibration covered 1-2000 Hz. It is shown that the water flow rate reduces under the vibration and this reduction strongly depends on the frequency and the type of the vibration. The main reason for this dependence is shown to be as follows. The vibration stretches the tube and the average length of the tube is longer under the vibration than when under no vibration, and the average tube radius is smaller under the vibration. This causes the reduction of the flow rate under vibration. Because the stretch of the tube strongly depends on the frequency and the type of the vibration, the above dependence of the water flow rate finally appears.