title: Numerical simulation of compressible fluid flow in an ultrasonic suction pump.
abstract: Characteristics of an ultrasonic suction pump that uses a vibrating piston surface and a pipe are numerically simulated and compared with experimental results. Fluid analysis based on the finite-difference time-domain (FDTD) routine is performed, where the nonlinear term and the moving fluid-surface boundary condition are considered. As a result, the suction mechanism of the pump is found to be similar to that of a check valve, where the gap is open during the inflow phase, and it is nearly closed during the outflow phase. The effects of Reynolds number, vibration amplitude and gap thickness on the pump performance are analyzed. The calculated result is in good agreement with the previously measured results.
authors.affiliation: Precision and Intelligence Laboratory, Tokyo Institute of Technology, 4259-R2-26 Nagatsutacho, Midori-ku, Yokohama 226-8503, Japan. Electronic address: yuji.wada@st.seikei.ac.jp.
authors.forename: Yuji
authors.initials: Y
authors.lastname: Wada
authors.affiliation: Faculty of Science and Engineering, Doshisha University, 1-3 Miyakodani, Tatara, Kyotanabe, Kyoto 610-0321, Japan. Electronic address: dkoyama@mail.doshisha.ac.jp.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Koyama
authors.affiliation: Precision and Intelligence Laboratory, Tokyo Institute of Technology, 4259-R2-26 Nagatsutacho, Midori-ku, Yokohama 226-8503, Japan. Electronic address: knakamur@sonic.pi.titech.ac.jp.
authors.forename: Kentaro
authors.initials: K
authors.lastname: Nakamura
keywords: Acoustic streaming; FDTD; Fluid analysis; Numerical analysis; Ultrasonic pump