Abstract
Micropumps have been investigated as drug delivery and disease diagnostic devices. Many of these micropumps have been designed, considering primarily, available micro fabrication technologies rather than appropriate pump performance analysis. Piezoelectric and silicon based micro pumps are more popular as compared to other smart materials being explored. The microneedle is an integral part of these micropumps providing an interface between the drug reservoir and the patient’s body for extracting the blood for investigation. Blood collected in the pump chamber passes through the biosensor and gives the required investigation report. It is aimed to minimize the pain while the microneedle is inserted in the body without having any effect on the flow characteristics. Several factors affect the pain while inserting the needle, out of which shape and size of the microneedle are two important parameters. In this study we have investigated the effect of shape of the microneedle on the flow inside the micropump. A micropump design is based on the required flow at the biosensor point. All computations were carried out with water (Newtonian fluid) as the working fluid after carrying out a comparative analysis with human blood (non-Newtonian fluid). For the pentagonal shaped microneedle, the velocity at the top of the microneedle was minimum, which is beneficial in that fluid should remain in contact with the sensor for longer time.
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Rakesh Kumar Haldkar received the B.E. in Mechanical Engineering from the Gyan Ganga Institute of Technology and Sciences Jabalpur (MP), India, in 2008, and Master of Technology (M.Tech.) from the PDPM Indian Institute of Information Technology Design and Manufacturing (IIITDM) Jabalpur (MP) India, in 2011. He is a Ph.D. student in PDPM IIITDM Jabalpur. His current research areas are piezo based micropump and energy harvesting.
Vijay Kumar Gupta is currently a Professor at PDPM IIITDM Jabalpur. He received Ph.D. from Indian Institute of Technology Bombay in Smart Structures. His research interests include mechanical vibrations, smart structures, MEMS, mechatronics, robotics and finite element analysis.
Tanuja Sheorey is currently a Professor at PDPM IIITDM Jabalpur. She received the B.E. in Mechanical Engineering in 1985 from Government Engineering College, Jabalpur (MP) India, Master of Technology (M.Tech) from M.A. National Institute of Technology, Bhopal in 1988 and Ph.D. in 2002 from Indian Institute of Technology, Kanpur. Her research works are on computational fluid dynamics, and micro-fluidic devices.
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Haldkar, R.K., Gupta, V.K. & Sheorey, T. Modeling and flow analysis of piezoelectric based micropump with various shapes of microneedle. J Mech Sci Technol 31, 2933–2941 (2017). https://doi.org/10.1007/s12206-017-0536-z
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DOI: https://doi.org/10.1007/s12206-017-0536-z