Results 31 to 40 of about 2,174 (175)
Development of PZT Actuated Valveless Micropump [PDF]
Sensors, 2018 A piezoelectrically actuated valveless micropump has been designed and developed. The principle components of this system are piezoelectrically actuated (PZT) metal diaphragms and a complete fluid flow system. The design of this pump mainly focuses on a cross junction, which is generated by a nozzle jet attached to a pump chamber and the intersection ...
Fathima Rehana Munas +7 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.
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Scientific Reports, 2022 Asymmetric pumping is a sub-category of valveless pumping in which a flexible tube is rhythmically compressed in the transverse symmetry plane. Due to the resulting asymmetry between the suction and discharge pipes, a net pumping head is achieved ...
J. Anatol +8 more
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Research on unsteady characteristics of valveless piezoelectric micropump with planar conical tube [PDF]
E3S Web of ConferencesThe model of valveless piezoelectric micropump with planar conical tube is established in this paper, and dynamic mesh technology is used to simulate the unsteady characteristics of the micropump at different pressure amplitudes and driving frequencies ...
Cai Shengchuan
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A Valveless Piezoelectric Micropump Based on Projection Micro Litho Stereo Exposure Technology
IEEE Access, 2019 At present, the micropumps are usually adopted in microelectromechanical systems (MEMS) process, which is characterized by high technical complexity and expense, to obtain micro-scale internal channels. Moreover, the MEMS process is more suitable for the
Jun Huang +5 more
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Characterization of Electromagnetic Valveless Micropump [PDF]
TELKOMNIKA (Telecommunication Computing Electronics and Control), 2017 This paper presents an electromagnetically-actuated micropump for microfluidic application. The system comprises two modules; an electromagnetic actuator module and a diffuser module. Fabrication of the diffuser module can be achieved using photolithography process with a master template and a PDMS prepolymer as the structural material.
Rusli, M. Q. A. +2 more
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Advanced Intelligent Systems, EarlyView.A unifying device–cardiovascular interface framework is presented to classify implantable cardiovascular technologies as intracardiovascular blood‐contacting systems or extracardiovascular tissue‐only and blood‐handling architectures. Cross‐class comparison across shared semiquantitative criteria, including blood‐contact burden, biomimicry ...
Bergo Nicolò +7 more
wiley +1 more source
Presence of Emissary Veins in the Glabellar Region in Metopic Craniosynostosis
Clinical Anatomy, EarlyView.ABSTRACT Emissary veins connect intra‐ and extracranial venous circulation by bridging the dural venous sinuses to the external veins of the skull. Their variable presence and location may have important implications in perioperative blood loss. Clinical observations and previous studies suggest that emissary veins are more frequently present in the ...
Anna Sundelin +6 more
wiley +1 more source
Behavior of a viscoelastic valveless pump: a simple theory with experimental validation
BioMedical Engineering OnLine, 2010 Background A valveless pump generates a unidirectional net flow of fluid around a closed loop of soft viscoelastic tubing that is rhythmically compressed at one point. The tubing must have at least two sections with two different stiffnesses.
Babbs Charles F
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The characteristics of perivascular proinflammation in 4‐repeat tauopathies
Brain Pathology, EarlyView.The spatial distribution of perivascular proinflammation differs between PSP and CBD: PSP shows a predominance in basal ganglia (BG), whereas CBD demonstrates more widespread involvement of both BG and superior/middle frontal gyrus (S/M‐FG). PSP exhibits profound proinflammatory activation around venules while CBD affects a comparable magnitude around ...
Mu‐Hui Fu +5 more
wiley +1 more source