Results 101 to 110 of about 334 (147)

Paper-based microfluidics for wearable soft bioelectronics.

Lab Chip
Zhang F, Zhao G, Ouyang Q, Chen S, Yan Z.   +4 more
europepmc   +1 more source

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A piezoelectric valveless pump with flexible actuators

Journal of Intelligent Material Systems and Structures, 2023
A piezoelectric valveless pump with flexible actuators (PVPFA) is proposed, which owns advantages of flexible driving, changeable flow direction and high output performance. The PVPFA is consist of three flexible actuators and a pump body. The direction of pumping fluid can be changed by setting different fluid medium volumes in the hydraulic ...
Song Chen, Jie Zhang, Zijian Huang, Liewei Wang, Haidong Liu, Fanxu Meng, Junwu Kan   +6 more
openaire   +1 more source

Valveless Pumping Using a Two-Stage Impedance Pump

Frontiers of Mechanical Engineering, 2013
Impedance pump is defined as a type of valveless pumping mechanism, where an elastic tube is joined with a tube of different impedance, a periodic asymmetrical compression on part of the elastic tube will produce a unidirectional flow. Numerical and experimental studies had been conducted in the past, but little experimental work was found to exploit ...
Yousif Abdalla Abakr
exaly   +3 more sources

Simulations of Valveless Pumping in an Open Elastic Tube

SIAM Journal of Scientific Computing, 2009
Mathematical models and numerical simulations of flows driven by pumping without valves (valveless pumping) are presented. This work has been originally motivated by a biomedical objective to explain the complicated valveless blood flow mechanism in the circulation.
Wanho Lee, Eunok Jung
exaly   +2 more sources

Investigation of the Flow in Valveless Pumps

Applied Mechanics and Materials, 2013
An investigation of flow in valveless micropumps is presented. Numerical simulations are done using ANSYS. It is found that both laminar flow and turbulence phenomena would occurs in the diffuser/nozzle element. And SST (shear stress transport) turbulence model is chosen to be the most appropriate turbulence model,The simulations show when the opening ...
Lan Bai, Li Na Guan, Yue Gang Luo
openaire   +1 more source

Valveless Small Gas Pump

Nanoscale and Microscale Thermophysical Engineering, 2006
In this article, a small valveless gas pump based on a synthetic jet actuator is developed. Instead of a check or active valve, a special flow control structure in consideration of synthetic jet characteristics is designed to realize valve function. A small-sized prototype of this pump is presented.
Xiao-Bing Luo, Hye-Jung Cho
openaire   +1 more source

Mechanics of Biohybrid Valveless Pump-Bot

Journal of Applied Mechanics, 2021
Abstract Engineering living systems is a rapidly emerging discipline where the functional biohybrid robotics (or “Bio-bots”) are built by integrating of living cells with engineered scaffolds. Inspired by embryonic heart, we presented earlier the first example of a biohybrid valveless pump-bot, an impedance pump, capable of ...
Zhengwei Li, M. Taher A. Saif
openaire   +1 more source

In‐Vitro Evaluation of a Valveless Cardiac‐Assist Pump

Artificial Organs, 1989
Abstract: Diseases of the cardiovascular system are a major health‐care problem. Nearly 50% of all deaths are due to cardiovascular disease. A number of cardiovascular patients experience heart failure, mostly of the left ventricle, and require some form of mechanical support.
S, Einav, D, Elad, J M, Avidor, D, Stolero, A, Hagigat, J, Barak, B A, Vidne   +6 more
openaire   +2 more sources

Hemodialysis Using a Valveless Pulsatile Blood Pump

ASAIO Journal, 2008
Research on pulsatile blood pumps for extracorporeal life support has been widely performed because of the proven advantageous effects of blood pulsation. However, studies on the use of pulsatile blood pumps for hemodialysis are limited, although available evidence demonstrates that pulsatile blood flow has a positive influence on dialysis outcome ...
Kyungsoo, Lee, Cho Hae, Mun, Sa Ram, Lee, Byoung Goo, Min, Kyu Jae, Yoo, Yong Woo, Park, Yong Soon, Won   +6 more
openaire   +2 more sources

Miniature valveless ultrasonic pumps and mixers

Sensors and Actuators A: Physical, 2000
Abstract Miniature acousto-fluidic devices are described that operate as pumps without valves in channel widths of millimeters and below. These devices can also be configured to produce mixing in low-Reynolds-number flows. The prototypes are based on radio-frequency, ultrasonic piezoelectric transducers that exert a directed body force on the fluid ...
J.C Rife, M.I Bell, J.S Horwitz, M.N Kabler, R.C.Y Auyeung, W.J Kim   +5 more
openaire   +1 more source