Simulation of a valveless pump with an elastic tube

Shin, Soo Jai; Chang, Cheong Bong; Sung, Hyung Jin

doi:10.1016/j.ijheatfluidflow.2012.08.003

Cited by 12 publications

(9 citation statements)

References 23 publications

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“…In recent years, impedance pumping has gained popularity and was extensively studied for the case of a single vessel [ 1 , 3 , 6 , 7 , 8 , 9 , 14 , 15 , 18 , 21 ]. However, impedance pumping in a system of vessels has not yet been studied.…”

Section: Discussionmentioning

confidence: 99%

“…Full 3D approximation of the fluid-structure-interaction (FSI) problem for a circular cross-section tube have been performed only by Shin and Sung [ 16 ], reiterating that NFR depends nonlinearly on the actuating frequency. Simpler 2D approximations are more common [ 17 , 18 ]. The 2D Navier-Stokes equations using the immersed boundary method were employed to solve numerically the flow in closed [ 8 ] or open [ 18 ] configuration consisting of an elastic section and a rigid section.…”

Section: Introductionmentioning

confidence: 99%

“…Simpler 2D approximations are more common [ 17 , 18 ]. The 2D Navier-Stokes equations using the immersed boundary method were employed to solve numerically the flow in closed [ 8 ] or open [ 18 ] configuration consisting of an elastic section and a rigid section. The flow magnitude and direction were found for a limited number of parameters such as the location, amplitude and frequency of the actuation.…”

Section: Introductionmentioning

confidence: 99%

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Impedance Pumping and Resonance in a Multi-Vessel System

Zislin

Rosenfeld

2018

Bioengineering

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Impedance pumping is a mechanism that generates flow in a compliant vessel by repeatedly actuating the vessel asymmetrically, without employing any internal valves, blades, or other mechanisms. The net flow is obtained by establishing a constructive wave pattern. Elaborate studies of impedance pumping in a single vessel have shown that the flow rate strongly depends on the actuation frequency, as well as on other parameters, such as actuator location and amplitude, and that it operates best in the resonance mode. The present study extends these principles to a network of multiple compliant vessels, representing a cardiovascular system. The flow is modeled numerically by the one-dimensional approximation of the Navier-Stokes equations. Two configurations were examined, systems consisting of three and five compliant vessels. First, the natural frequencies of these configurations were identified. Then, the dependence of the net flow rate (NFR) on the actuating frequency was explored, showing that impedance pumping operates best in the resonance mode in the case of a network of vessels as well. The impact of other parameters were studied as well, such as the location of one or two actuators, actuation amplitude, actuator width, the duty cycle, and the phase lag between the actuators. The results show that impedance pumps can generate significant NFR and the obtained NFR can be manipulated by properly setting up one or more of the governing parameters. These findings indicate that impedance pumping principles may be applied to flow control of the cardiovascular system.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Impedance Pumping and Resonance in a Multi-Vessel System

Zislin

Rosenfeld

2018

Bioengineering

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“…Impedance pump is still on subjective deliberation and starting to gain interest due to its potential. Due to its intricate nature and reliance on some parameters, many researchers have simplified its model from various numerical studies [7][8][9][10] and identified the parameters and documented the behavior of the flow from experimental studies [11][12][13].…”

Section: Impedance Pumpmentioning

confidence: 99%

Experimental Study on Net Flow Rate Generation Inside Closed Loop Mechanical Circulatory System Using Impedance Pump

Razak

Rosli

Mohamad

2018

IJET

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This present study focused on the performance of net flow rate inside closed loop mechanical circulatory system with single and double pinching impedance pumps which generates a unidirectional flow of fluid around closed loop of soft viscoelastic tubing. The experimental setup consisted of viscoelastic tubing connected between two ends of rigid tube which was compressed rhythmically or squeezed asymmetrically at various frequencies by motorized pinching. Hence, net flow of fluid around the tubing can occur without valves. Experiment was done on two different fluid, namely Newtonian and Non-Newtonian. Result showed that the flow rate inside closed loop system for non-Newtonian fluid and Newtonian fluid were in good agreement with each other. Single pinching showed a lower flow rate compared to double pinching at higher frequency. The results could be used as a model for a new Mechanical Circulatory Support System used by cardiac patients. Factors influencing the performance of valveless impedance pump was also explained.

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“…The generation of fluid motion is secured by the so-called Liebau effect, when the less rigid tube is periodically pressed. This principle of pumping can be used for both open and closed loops and also for macro and micro scale pumping [9,10,16].…”

Section: Introductionmentioning

confidence: 99%

Computational study of a novel valveless design of a macroscale piston pump

Martı́n

Pochylý

Šulc

2019

ACM

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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. The simulations were carried out on a simplified 2D geometry model of the pump. The dependencies of the volumetric efficiency of the pump on parameters of piston motion (frequency and amplitude) and backpressure are the results of the simulations. The principle of the pump is based on different rates of dissipation in the discharge and the suction diode. The paper also presents a qualitative analysis of dissipation function for turbulent flow, which provides further insight into the principle of valveless pumping.

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Simulation of a valveless pump with an elastic tube

Cited by 12 publications

References 23 publications

Impedance Pumping and Resonance in a Multi-Vessel System

Impedance Pumping and Resonance in a Multi-Vessel System

Experimental Study on Net Flow Rate Generation Inside Closed Loop Mechanical Circulatory System Using Impedance Pump

Computational study of a novel valveless design of a macroscale piston pump

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