Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 11, 2020 - November 13, 2020
A micropump is a type of small and precise pump, which is mainly used for fuel supply for small fuel cells and liquid transport for biotechnology and medical equipment. However, viscous micropumps are one of the most suitable micropumps to be driven inside the body, and their features include continuous transport of liquid and simple structure, which is advantageous in terms of manufacturing. In this study, we develop a viscous micropump that can be driven inside the human body using a helical shape and evaluate its performance by experiments and numerical calculations. The experimental method uses a motor to rotate a helical-shaped pump in a pipe filled with silicone oil. Then, the mass change of the silicon oil flowing into the downstream tank is measured by a load cell at each time, and the flow rate ṁ and the pressure difference Δp are calculated. For numerical calculations, Ansys is used to calculate the maximum flow rate, ṁmax, and the maximum pressure difference, Δpmax, generated by the rotation of the two-wind helical geometry using a steady-state analysis with approximately 460000 meshes. Finally, in Re < 10, the maximum pressure coefficient has constant value. In Re > 10, the maximum pressure coefficient is increased with the increase of the Reynold number.
