• 제목, 요약, 키워드: Peristaltic flow

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수치해석을 이용한 튜브 연동식 펌프의 변형에 대한 연구 (The Study About Deformation of a Peristaltic Pump using Numerical Simulation)

  • 왼바흥;임옥택
    • 한국수소및신에너지학회논문집
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    • v.26 no.6
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    • pp.652-658
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    • 2015
  • The purpose of this study is to investigate the effects of changing dimension of a soft tube in a peristaltic pump on deformation, stress and fluid flow rate of the peristaltic pump. Geometries of the peristaltic pump is created in a Catia drawing software based on specifications of a real peristaltic pump. Afterwards, the geometries of this pump is imported into a commercial Ansys software to calculate deformation, stress, and fluid flow rate of this pump. The simulation results showed that the deformation and stress of the soft tube is increased by increasing soft tube diameter from 2 mm to 4 mm. When the tube diameter is increased to 5 mm and tube thickness is reduced to 0.5 mm, the soft tube is damaged. The highest fluid flow rate could be found at the tube thickness and diameter of 1 mm and 4 mm, respectively.

연동펌프의 유량맥동 조절과 역류현상을 방지하는 장치에 대한 연구 (A Study for Regulating Flow Fluctuation and Preventing Backflow of Peristaltic Pump)

  • 정유석;이철수;이태경
    • 한국유체기계학회 논문집
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    • v.19 no.5
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    • pp.28-34
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    • 2016
  • Though a peristaltic pump is a crucial element in miniaturized drug delivery systems, it has some intrinsic disadvantages such as backflow and flow fluctuation. To overcome these limitation, we have developed valve-less peristaltic pump system including orifice and stagnation chamber. we measured flow rate to investigate the performance of rotary peristaltic pump with three rollers and an elastomeric tube pumping a viscous fluid. The flow fluctuations and the backflow happen as a result from the disengagement of the contact interaction between the rollers and the tubes. Stagnation chamber installed in front of orifice plate was composed of rubber tube and gas chamber. By changing orifice hole diameter with stagnation chamber flow rate and pressure in the tube was regulated. The obtained maximum reduction ratio of flow fluctuation is 96.79%.

저 맥동 연동 펌프 기반 플로우 스루 셀 방식 용출 장치 설계 (Design of Dissolution Apparatus for the Flow-through Cell Method Based on the Low Pulsation Peristaltic Pump)

  • 조준성;정석;박상범
    • 한국기계가공학회지
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    • v.19 no.1
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    • pp.11-18
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    • 2020
  • The emergence of the flow-through cell (FTC) method has made up for the limitations of previous dissolution test methods, but the high cost of the FTC dissolution devices have seriously hindered the progression of research and application of the FTC. This new design uses a peristaltic pump to simulate the sinusoidal flow rate of a piston pump. The flow profile of each peristaltic pump was sinusoidal with a pulsation of 120 ± 1 pulses per minute, and the flow rate ranged from 1.0 - 36.0 mL/min. The flow control of each channel was adjusted independently so the flow errors of the seven channels were close to 2%. The structure of the system was simplified, and the cost was reduced through manual sampling and immersing the FTC in a water bath. The dissolution rate of the theophylline and aminophylline films was determined, and good experimental results were obtained.

Effect of High Reynolds Number on Hydromagnetic Peristaltic Flow in an Inclined Channel Using Finite Element Method

  • Javed, Tariq;Hamid, A.H.;Ahmed, B.;Ali, N.
    • Journal of the Korean Physical Society
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    • v.71 no.12
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    • pp.950-962
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    • 2017
  • An analysis of the peristaltic flow in an inclined channel for different wave forms is carried out in this paper. The developed mathematical model is represented by a set of partial differential equations. The finite element method is implemented to solve the governing equations for stream function and vorticity. The obtained results are valid beyond the long wavelength and low Reynolds number limits. Important features of peristaltic transport are discussed for the variation of magnetic field, Reynolds and wave numbers. The obtained results, when compared with the results available in literature are in good agreement.

Fabrication and Drive Test of a Peristaltic Thermopnumatic PDMS Micropump

  • Jeong Ok Chan;Park Sin Wook;Yang Sang Sik
    • Journal of Mechanical Science and Technology
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    • v.19 no.2
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    • pp.649-654
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    • 2005
  • This paper presents fabrication and drive test of a peristaltic PDMS micropump actuated by the thermopneumatic force. The micropump consists of the three peristaltic-type actuator chambers with microheaters on the glass substrate and a microchannel connecting the chambers and the inlet/outlet port. The micropump is fabricated by the spin-coating process, the two-step curing process, the JSR (negative PR) molding process, and etc. The diameter and the thickness of the actuator diaphragm are 2.5 mm and $30{\mu}m$, respectively. The meniscus motion in the capillary tube is observed with a video camera and the flow rate of the micro pump is calculated through the frame analysis of the recorded video data. The maximum flow rate of the micropump is about $0.36\;{\mu}L/sec$ at 2 Hz for the zero hydraulic pressure difference when the 3-phase input voltage is 20 V.

연동형 마이크로펌프의 유동에 대한 수치해석 연구 (A Numerical Study on the Flow Characteristics of a Peristaltic Micropump)

  • 이나리;이상혁;허남건
    • 한국유체기계학회 논문집
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    • v.12 no.4
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    • pp.37-43
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    • 2009
  • In the present study, the flow characteristics of a peristaltic micropump were numerically analyzed. A channel wall motion of the micropump was simulated using a moving mesh technique. A sine wave pattern was assumed to simulate the peristaltic motion of wall. The present numerical method was verified by comparing the result with the available numerical data. The effects of the operating conditions which include the maximum displacement and frequency of the channel wall and the phase difference between top and bottom walls on the flow characteristics were investigated. From these numerical results, the pressure-flowrate characteristic curve was obtained for various maximum displacement and frequencies.

Bionic Study of Variable Viscosity on MHD Peristaltic Flow of Pseudoplastic Fluid in an Asymmetric Channel

  • Khan, Ambreen A.;Muhammad, Saima;Ellahi, R.;Zia, Q.M. Zaigham
    • Journal of Magnetics
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    • v.21 no.2
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    • pp.273-280
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    • 2016
  • In this paper, the peristaltic flow of Psedoplastic fluid with variable viscosity in an asymmetric channel is examined. The bionic effects by means of magnetohydrodynamics (MHD) are taken into account. The assumptions of long wave length and low Reynolds number are taken into account. The basic equations governing the flow are first reduced to a set of ordinary differential equation by using appropriate transformation for variables and then solve by using perturbation method. The effect of physical parameters on the pressure rise, velocity and pressure gradient are illustrated graphically. The trapping phenomenon is analyzed through stream lines. A suitable comparison has also been made as a limiting case of the considered problem.

다수 개 디스크 PZT 를 이용한 밸브리스 압전펌프의 연동구동 파형에 관한 연구 (A study on the peristaltic waveform of valveless PZT pump using disk type multi PZTs)

  • 함영복;박중호;윤동현;김한석
    • 한국정밀공학회:학술대회논문집
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    • pp.1824-1827
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    • 2005
  • For application to micro fluid control systems such as ${\mu}TAS$ (Micro Total Analysis Systems) and DDS (Drug Delivery Systems), it is very significant to handle precise and minute flow rates with low pressure pulsation. In this study, a novel valveless piezoelectric pump using peristaltic motion with three disk type PZT actuators is presented. The newly devised pump with an effective size of $70mm{\times}60mm{\times}55mm$ has three actuator layers connected in series from inlet to outlet. The PZT actuator has a maximum displacement of 240 ${\mu}m$ and a maximum force of 1.6 N. When the driving voltage for PZT actuators is sequentially applied with a certain phase shift, the pumping is performed by peristaltic motion of liquid volume. The working fluid is shut off without the driving voltage. Three methods for sequential driving are proposed and experimentally investigated. First and second methods utilize an intermittent sinusoidal waveform with phase shift of $90{\circ}\;and\;120^{\circ}$, respectively. Third method uses a rectangular waveform with phase shift of $90^{\circ}$. A controller with multi-phase shifter is designed and fabricated. Then, frequency and voltage-flow rate characteristics and load pressure-flow rate characteristics are experimentally investigated to verify the validity of the developed pump.

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마이크로 정량펌프의 유동해석과 작동성능 평가 (The Flow Analysis and Evaluation of the Peristaltic Micropump)

  • 박대섭;최종필;김병희;장인배;김헌영
    • 한국정밀공학회지
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    • v.21 no.2
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    • pp.195-202
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    • 2004
  • This paper presents the fabrication and evaluation of mechanical behavior for a peristaltic micropump by flow simulation. The valve-less micropump using the diffuser/nozzle is consists of the lower plate, the middle plate, the upper plate and the tube that connects inlet and outlet of the pump. The lower plate includes the channel and the chamber, and the plain middle plate are made of glass and actuated by the piezoelectric translator. Channels and a chamber on the lower plate are fabricated on high processability silicon wafer by the DRIE(Deep Reactive Ion Etching) process. The upper plate does the roll of a pump cover and has inlet/outlet/electric holes. Three plates are laminated by the aligner and bonded by the anodic bonding process. Flow simulation is performed using error-reduced finite volume method (FVM). As results of the flow simulation and experiments, the single chamber pump has severe flow problems, such as a backflow and large fluctuation of a flow rate. It is proved that the double-chamber micropump proposed in this paper can reduce the drawback of the single-chamber one.

The Pumping Characteristics of the Valveless Peristaltic Micropump by the Variation of Design Parameters

  • Chang, In-Bae;Park, Dae-Seob;Kim, Byeng-Hee;Kim, Heon-Young
    • KSTLE International Journal
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    • v.3 no.2
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    • pp.101-109
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    • 2002
  • This paper presents the fabrication and performance inspection of a peristaltic micropump by flow simulation. The valve-less micropump using the diffuser/nozzle is consists of base plate, mid plate, top plate and connection tubes fur inlet and outlet. In detail, the base plate is composed of two diffuser nozzles and three chambers, the mid plate consists of a glass diaphragm for the volumetric change of the pumping chamber. The inlet and outlet tubes are connected at the top plate and the actuator fur pressing the diaphragm is located beneath the top plate. The micropump is fabricated on the silicon wafer by DRIE (Deep Reactive ion Etching) process. The pumping performances are tested by the pneumatic test rig and compared with the simulated results fur various dimensions of diffuser nozzles. The pumping characteristics of the micropump by the volumetric change at the pumping chamber is modeled and simulated by the commercial software of FLOW-3D. The simulated results shows that reverse flow is the inherent phenomena in the diffuser nozzle type micropump, but it can be reduced at the dual pumping chamber model.