Theoretical and experimental studies of a magnetically actuated valveless micropump

Ashouri, Majid; Shafii, Mohammad Behshad; Moosavi, Ali

doi:10.1088/0960-1317/27/1/015016

Cited by 17 publications

(4 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Microfluidic is the system that provides manipulation of a very small amount of fluids by using micro-sized channels [2]. It has broad application fields in micro-size equipment such as microsensors [3], microactuators [4], microvalves [5], micropumps [6],…”

Section: Introductionmentioning

confidence: 99%

A rotating permanent magnetic actuator for micropumping devices with magnetic nanofluids

Doğanay

Çetín

Ezan

et al. 2020

J. Micromech. Microeng.

View full text Add to dashboard Cite

In this study, a novel rotating permanent magnetic actuator (PMA) system is proposed to manipulate magnetic nanofluids to pump chemicals inside micro-sized channels with circular paths. The PMA consists of two permanent magnet pairs and a rotor-like structure. A semicircular-shaped microchannel with a square cross-section area is located at the top of the actuator in order to investigate the performance of the PMA. Fe3O4-water magnetic nanofluid is employed as a working fluid for the manipulation inside the microchannel. In the first stage of this work, a numerical survey is conducted to determine the most suitable angular distance between permanent magnets of a pair in terms of generated magnetic field form in the microchannel region and velocity distribution of magnetic nanofluid within the semicircular microchannel when the permanent magnets are stationary. Preliminary experiments are then carried out for the stationary permanent magnets to validate the predicted flow-field results. Performance tests for different PMA speeds (7.5–30 rpm) and particle concentrations (1%–3% by vol.) indicate that it is possible to manipulate the magnetic nanofluid inside the semicircular channel within a velocity range of 58.7–940 µm s−1, which corresponds to a flow rate range of 0.56–9.02 µL min−1. The results confirm that the proposed PMA system provides flow rate requirements in analytical microfluidic applications such as low flow drug delivery (1–10 µL min−1), cell sorting (6.1 µL min−1), and pathogen detection (3–5.83 µL min−1).

show abstract

Section: Introductionmentioning

confidence: 99%

A rotating permanent magnetic actuator for micropumping devices with magnetic nanofluids

Doğanay

Çetín

Ezan

et al. 2020

J. Micromech. Microeng.

View full text Add to dashboard Cite

show abstract

“…( 20 ). Other examples ( 13 , 21 – 28 ) offer the potential for efficient, distributed fluidic actuation or analogous approaches to soft displacement and rotary pumps ( 13 , 29 – 42 ), and, while they all incorporate soft materials or could be envisioned as a viable pumping solution for soft robotic application; none report performance under deformation, limiting their practical application. Thus, there still remains an important need for a compliant displacement pump that offers high flow rates, q = O (10 2 ) mL⋅min −1 , and pressures, p = O (10 5 ) Pa, at a system duty point (i.e., system and pump-curve intersection) compatible with human-scale FEA systems, O (10 −1 to 10 0 ) m. Further, scalable and continuous performance under quasistatic or dynamic deformation should also be a feature of this pump to facilitate technology transfer.…”

Section: Introductionmentioning

confidence: 99%

Magnetohydrodynamic levitation for high-performance flexible pumps

Matia

Shepherd

et al. 2022

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

We use magnetohydrodynamic levitation as a means to create a soft, elastomeric, solenoid-driven pump (ESP). We present a theoretical framework and fabrication of a pump designed to address the unique challenges of soft robotics, maintaining pumping performance under deformation. Using a permanent magnet as a piston and ferrofluid as a liquid seal, we model and construct a deformable displacement pump. The magnet is driven back and forth along the length of a flexible core tube by a series of solenoids made of thin conductive wire. The magnet piston is kept concentric within the tube by Maxwell stresses within the ferrofluid and magnetohydrodynamic levitation, as viscous lift pressure is created due to its forward velocity. The centering of the magnet reduces shear stresses during pumping and improves efficiency. We provide a predictive model and capture the transient nonlinear dynamics of the magnet during operation, leading to a parametric performance curve characterizing the ESP, enabling goal-driven design. In our experimental validation, we report a shut-off pressure of 2 to 8 kPa and run-out flow rate of 50 to 320 mL⋅min −1 , while subject to deformation of its own length scale, drawing a total of 0.17 W. This performance leads to the highest reported duty point (i.e., pressure and flow rate provided under load) for a pump that operates under deformation of its own length scale. We then integrate the pump into an elastomeric chassis and squeeze it through a tortuous pathway while providing continuous fluid pressure and flow rate; the vehicle then emerges at the other end and propels itself swimming.

show abstract

“…Thus, a large panel of microfluidic functionalities for fluid sample handling has emerged employing composite polymers, such as micro-valves, micro-pumps, or micro-mixers for microfluidic flow control [36,40,[42][43][44][45][46][47]; dynamic artificial cilia [41,[48][49][50]; and reversible microchannel bonding [51]. Ferrofluids were also explored for actuation in microfluidic systems [52][53][54][55].…”

Section: Introductionmentioning

confidence: 99%

Magnetic Polymers for Magnetophoretic Separation in Microfluidic Devices

et al. 2021

View full text Add to dashboard Cite

Magnetophoresis offers many advantages for manipulating magnetic targets in microsystems. The integration of micro-flux concentrators and micro-magnets allows achieving large field gradients and therefore large reachable magnetic forces. However, the associated fabrication techniques are often complex and costly, and besides, they put specific constraints on the geometries. Magnetic composite polymers provide a promising alternative in terms of simplicity and fabrication costs, and they open new perspectives for the microstructuring, design, and integration of magnetic functions. In this review, we propose a state of the art of research works implementing magnetic polymers to trap or sort magnetic micro-beads or magnetically labeled cells in microfluidic devices.

show abstract

Theoretical and experimental studies of a magnetically actuated valveless micropump

Cited by 17 publications

References 50 publications

A rotating permanent magnetic actuator for micropumping devices with magnetic nanofluids

A rotating permanent magnetic actuator for micropumping devices with magnetic nanofluids

Magnetohydrodynamic levitation for high-performance flexible pumps

Magnetic Polymers for Magnetophoretic Separation in Microfluidic Devices

Contact Info

Product

Resources

About