IPMC-assisted miniature disposable infusion pumps with embedded computer control

Vohnout, Sonia; Kim, Sang‐Mun; Park, Il‐Seok; Banister, Mark; Tiwari, Rashi

doi:10.1117/12.716410

Cited by 11 publications

(13 citation statements)

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“…As such there is an urgent need for portable pumps for enhanced mobility. Hence, many researchers are putting efforts in developing smaller and wearable devices so that patients can maintain their normal life style and perform daily activities with minimal disruption [2,7,8].…”

Section: Introductionmentioning

confidence: 99%

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Experimental investigation of the reciprocating ball pump (RBP)

Lieu

Chan

Ooi

2012

Medical Engineering & Physics

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Section: Introductionmentioning

confidence: 99%

“…Miniature pumps are used widely in liquid cooling systems of small components, in printing technology as well as in medical or pharmaceutical applications [1][2][3][4][5][6]. They are also used in applications that require relatively low flow rates.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of the reciprocating ball pump (RBP)

Lieu

Chan

Ooi

2012

Medical Engineering & Physics

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“…In order to overcome these problems, a convenient and cost effective solution for delivering drug has been introduced. These devices include infusion pump [3,4], syringe pump [60]. However, these pumps are generally not portable and not wearable and they are not suitable for patients who require regular intervals of drug intake such as those suffering from diabetes and requiring regular intake of insulin.…”

Section: A Pharmaceutical Applicationsmentioning

confidence: 99%

“…Researchers are putting efforts in developing a smaller and wearable device so that patients can maintain their normal life style and perform daily activities with minimal disruption. Some researchers are working on an infusion pump which is implantable or with embedded computer control [3,4].…”

Section: A Pharmaceutical Applicationsmentioning

confidence: 99%

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Design of a miniature pump

Lieu¹

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The applications of pumps are becoming increasingly extensive and there are more application-specific constraints that are imposed on pump designs, including constraints in size and capacity. Thus, miniature pumps have gained their popularity in many industries such as pharmaceutical, medical, MEMS applications etc. The design and development of a miniature pump is necessary to serve these applications. However, miniaturization process is both difficult and challenging. In this project, a miniature pump with better performance has been designed and developed. Several designs are discussed and explored and the reciprocating ball pump (RBP) is proposed. The working principle of the RBP is presented. The RBP is unique in that it does not require any valves to regulate flow and inherently produce unidirectional flow. In addition, the design of this pump is simple, compact and easy to fabricate. Besides that, this pump has potential in pumping fluid with minimal contamination because the pumping unit is small in size and it does not require a seal and bearing. Furthermore, it has the potential in generating a higher flow rate as compared to the conventional reciprocating pump. The final RBP is 19.5 mm long, has a diameter of 18.8 mm and weighs less than 25 grams. In this research project, a mathematical model has been developed with some assumptions and simplifications to reveal the working principle and to evaluate the performance of the RBP. It also enables the prediction on the instantaneous flow rate and pressure variations upstream and downstream of the RBP. In addition, parametric studies have been conducted to determine the effects of the weight of the ball and the Abstract iii size of the pumping unit on its performance. In addition, parametric studies show that the optimal RBP has a casing length of 11.5 mm, a ball of diameter 9.6 mm with a rear cap hole diameter of 8.5 mm. CFD simulation with fluid-structure-interaction (FSI) of the RBP has been successfully conducted via ANSYS-FLUENT by using moving and deforming dynamic mesh model with user-defined-function (UDF). Asides from revealing the working principle and the performance of the RBP, CFD simulation also shows the working principle of the RBP in a more comprehensive manner through the pressure distribution and velocity flow field. Subsequently, the functionality of the RBP has been verified by experimental studies. In addition, a modified test rig was used to conduct flow visualization experiments. The mathematical model and CFD simulation have been validated by the experimental performance characteristic and flow visualization studies as they agree qualitatively with the results obtained from both mathematical model and CFD simulation. The three studies show that the RBP generates additional induced flow especially during its backward stroke even though the RBP is operated at a back pressure of as high as 1000 Pa. This proves that the RBP is superior to a conventional reciprocating pump having the same dimensions. The RBP has a flow efficiency of as h...

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Predicting simulation of flow induced by IPMC oscillation in fluid environment

Pinto

Cruz

Ranjbarzadeh

et al. 2018

J Braz. Soc. Mech. Sci. Eng.

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This work deals with numerical modeling of fluid-structure interactions of a strip-shaped IPMC actuation in an aqueous environment. We consider an electro-chemo-mechanical model to predict the behavior of a strip-shaped IPMC actuation. The flow is predicted using the Navier-Stokes equations. The model is implemented and solved using the finite-element software COMSOL Multiphysics. Numerical simulations of the hydrodynamics induced by the strip-shaped IPMC are carried out for the purpose of novel propulsive actuators that interact with vortex flows to absorb their energy and release it at appropriate phase. The simulation results might be used to determine the effectiveness and application of IPMCs for micro-propulsion mechanisms, IPMC cilia-like structures used for flow actuation and mixing applications.

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IPMC-assisted miniature disposable infusion pumps with embedded computer control

Cited by 11 publications

References 0 publications

Experimental investigation of the reciprocating ball pump (RBP)

Experimental investigation of the reciprocating ball pump (RBP)

Design of a miniature pump

Predicting simulation of flow induced by IPMC oscillation in fluid environment

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