bullet Sensors & Transducers Journal

    (ISSN 1726- 5479)


2007 e-Impact Factor

25 Top Downloaded Articles

Journal Subscription 2008

Editorial Calendar 2008

Submit an Article

Editorial Board

Current Issue

Sensors & Transducers journal's cover


Sensors & Transducers Journal 2007

2000-2002 S&T e-Digest Contents

2003 S&T e-Digest Contents

2004 S&T e-Digest Contents

2005 S&T e-Digest Contents

2006 S&T e-Digest Contents


Best Articles 2007




Vol. 94, Issue 7, July 2008, pp.176-195




Multifield Analysis of a Piezoelectrically Actuated Valveless Micropump


Asim Nisar1*, Nitin Afzulpurkar1, Banchong Mahaisavariya2, Adisorn Tuantranont3

1School of Engineering and Tech., Asian Institute of Technology (AIT), Thailand

2Siriraj Hospital, Faculty of Graduate Studies, Mahidol University, Thailand

3Nanoelectronics and MEMS Lab, National Electronics and Computer Technology Center, Thailand

E-mail: 1*Corresponding Author: Asim.Nisar@ait.ac.th



Received: 12 May 2008   /Accepted: 21 July 2008   /Published: 31 July 2008


Abstract: In this paper, a MEMS based piezoelectrically actuated valveless micropump with biocompatible polymer membrane materials for drug delivery applications is numerically studied by multifield code coupling method. In the multifield study, structural and fluid domains of a three dimensional model of the micropump are solved sequentially with piezoelectric-solid-fluid coupling. The effect of geometrical dimensions and different membrane materials such as polymethylmethacrylate (PMMA) and polydimethylsiloxane (PDMS) on micropump characteristics and efficiency of nozzle/diffuser elements of a valveless micropump is investigated in the multifield analysis. The deformation results of the membrane using multifield code coupling analysis are in good agreement with published results of single code coupling analysis of a piezoelectric micropump. The analysis predicts that there is a definite relationship between membrane and piezoelectric actuator thickness to obtain maximum pump flow. The analysis predicts that optimal piezoelectric actuator thickness is dependent on membrane material properties. The diffuser efficiency is a strong function of diffuser geometrical dimensions and pressure loss coefficients. To enhance the performance of the micropump, diffuser geometrical dimensions such as diffuser length, diffuser neck width and diffuser angle need to be optimized.


Keywords: Drug Delivery, MEMS, Multifield analysis, Multiple Code coupling, PDMS, Piezoelectric, PMMA, Valveless micropump


 Acrobat reader logo Click <here> or title of paper to download the full pages article (1.22 Mb)





1999 - 2008 Copyright , International Frequency Sensor Association (IFSA). All Rights Reserved.

Home - News - Links - Archives - Tools - Standardization - Patents - Marketplace - Projects - Wish List - Subscribe - Search - e-Shop - Membership

 Members Area -Sensors Portal -Training Courses - S&T Digest - For advertisers - Bookstore - Forums - Polls - Sensor Jobs - Site Map