Results 111 to 120 of about 334 (147)
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Research on the performance of a valveless piezoelectric pump with a herringbone bluffbody
Review of Scientific Instruments, 2023Aiming to improve the output performance of a valveless piezoelectric pump, this article presents a valveless piezoelectric pump with a herringbone bluffbody. The bluffbody is herringbone shaped and distributed in a tapered chamber. The tapered chamber and the bluffbody create a large reverse resistance in the chamber, thus effectively mitigating the ...
Dahai Yu +5 more
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Simulation of a valveless pump with an elastic tube
International Journal of Heat and Fluid Flow, 2012Abstract A valveless pump consisting of a pumping chamber with an elastic tube was simulated using an immersed boundary (IB) method. The interaction between the motion of the elastic tube and the pumping chamber generated a net flow toward the outlet throughout a full cycle of the pump.
Shin, S.J Shin, Soo Jai +2 more
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Modeling Valveless Pumping Mechanisms
2014Several mechanisms of valveless pumping are studied numerically. The discussion begins with an introduction into the two well-known driving mechanisms of flow in valveless tubes: impedance pumping and peristalsis. Flow generated from peristalsis and impedance pumping is examined using the immersed boundary method.
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Flexible Valveless Pump for Bio Applications
Volume 10: Micro- and Nano-Systems Engineering and Packaging, 2019Abstract In electromechanical actuators Lorentz force law is used to convert electrical energy into rotational or linear mechanical energy. In these conventional electromechanical actuators, rigid wires conducts the electrical current and as such the types of motion generated by these actuators are limited.
Paul M. Goggans +2 more
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Features of the Design of a Valveless Spur Pump
Chemical and Petroleum Engineering, 2020A new engineering solution, a rotary valveless volumetric spur pump, is considered and features of the operation of the pump are considered. A technique for constructing the profile of the hollow in a pump closure is presented. With the use of the technique, dependences of the pump effective storage on the geometric parameters of the driven elements of
A. V. Grigor’ev, G. A. Nesterenko
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An Implantable Valveless Heart Assist Pump
Journal of Basic Engineering, 1969An intracorporeal left ventricular bypass, incorporating an electrically driven roller pump, has operated successfully in unrestrained calves for periods up to 11 days. A pneumatically powered prototype, designed for eventual human application, extends potential effective pumping periods to two months in tests simulating implanted conditions ...
M. C. Turner +3 more
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Three-dimensional simulation of a valveless pump
International Journal of Heat and Fluid Flow, 2010Abstract An immersed boundary (IB) method for simulating a three-dimensional valveless pump is described. The valveless pump is treated as an elastic tube connected at its ends to a rigid tube. The governing equation for the motion of the elastic tube is derived by using the variational derivative of the deformation energy.
Shin, SJ Shin, Soo Jai +1 more
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A simple pumping mechanism in a valveless tube
Zeitschrift für angewandte Mathematik und Physik ZAMP, 1978A torus consisting of an elastic and a rigid piece of tube is considered (Fig. 1). Surprisingly high velocities are generated by suddenly closing the tube in the vicinity of a junction between the elastic and the rigid part and opening again a fraction of a second later. A simple analysis shows (Eqns. 9, 18 and 19) that a velocity maximum of order\(a_0
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Valveless Liquid-Ring Vacuum Pumps
Vakuum in Forschung und Praxis, 2007Besides the procedural requirements in recent years, investment and operation costs have become increasingly important. As part of this essay concerning the simplification of the construction and reduction of the maintenance costs, new expertise regarding the processes in liquid-ring vacuum pumps is presented.
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Prospects for valveless positive displacement pumps
Construction of Oil and Gas Wells on Land and Sea, 2021V.V. Shaidakov +4 more
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