Results 11 to 20 of about 334 (147)
Valveless Pumping with an Unsteady Stenosis in an Open Tank Configuration
FluidsThis work examines the beneficial role of an unsteady stenosis, not driven by any external energy source, as a means for augmenting the flow rate of a valveless pump in a hydraulic loop, including an open tank.
Christos Manopoulos +1 more
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Design and Fabrication of Pneumatically Actuated Valveless Pumps. [PDF]
Micromachines (Basel), 2021 In this study, a valveless pump was successfully designed and fabricated for the purpose of medium transportation. Different from traditional pumps, the newly designed pump utilizes an actuated or a deflected membrane, and it serves as the function of a check valve at the same time.
Lin JL.
europepmc +5 more sources
Advances in Valveless Piezoelectric Pumps [PDF]
Applied Sciences, 2021 Piezoelectric pump design is regarded as a hot research topic in the microfluidic field, and has been applied in liquid cooling, precision machinery and other relevant domains. The valveless piezoelectric pump becomes an important branch of the piezoelectric pump, because it successfully avoids the problem of “pump-lagging of valve” during the valve ...
Qiufeng Yan +3 more
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Shapeshifting Liquid Metal Droplets for Soft Fluidic Machines. [PDF]
Adv MaterThis study presented a liquid metal shape shifting strategy which harnesses Lorentz force, surface tension and fluid instabilities to achieve autonomous fluidic power. By using a liquid metal droplet as a mobile current carrier, this strategy enables the development of low‐voltage, self‐oscillating pumps that outperform existing soft pumps.
Firouznia S +6 more
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Achieving Full Forward Flow of Valveless Piezoelectric Micropump Used for Micro Analysis System
Actuators, 2022 The valveless piezoelectric micropump has the advantages of simple structure, high precision and low cost, which can realize the directional transport of micro-fluid and wildly be applied in a micro analysis system. However, backflow at the outlet cannot
Kai Li +6 more
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Valveless Pumping at Low Reynolds Numbers
Physical Review Applied, 2023 Pumping at low Reynolds number is a ubiquitously encountered feature, both in biological organisms and engineered devices. Generating net flow requires the presence of an asymmetry in the system, which traditionally comes from geometric flow rectifiers.
Amselem, Gabriel +2 more
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Novel characteristics of valveless pumping [PDF]
Physics of Fluids, 2009 This study investigates the occurrence of valveless pumping in a fluid-filled system consisting of two open tanks connected by an elastic tube. We show that directional flow can be achieved by introducing a periodic pinching applied at an asymmetrical location along the tube, and that the flow direction depends on the pumping frequency.
Timmermann, Stine, Ottesen, Johnny T.
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Actuators, 2023 The valveless micropump based on dual synthetic jets is a potential fluid pumping device that has the ability to transport fluid continuously. In order to improve the performance of this device, a novel valveless continuous micropump based on dual ...
Jian-Yuan Zhang +5 more
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Flow Rate Augmentation of Valveless Pumping via a Time-Dependent Stenosis: A Novel Device
Fluids, 2023 A novel device of flow rate augmentation is proposed and experimentally examined in a horizontal valveless closed loop pump using a time-dependent stenosis (convergent–divergent channel) in contrast with the commonly used taper tubes of constant opening ...
Christos Manopoulos +1 more
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Computational study of a novel valveless design of a macroscale piston pump
Applied and Computational Mechanics, 2019 This paper deals with a novel valveless piston pump, which is using modified Venturi diodes as a replacement for common check valves. The pump characteristic was obtained from CFD simulations in ANSYS Fluent software.
Machů T., Pochylý F., Šulc J.
doaj +1 more source