Magneto-capillary particle dynamics at curved interfaces: inference and criticism of dynamical models DOI
Dimitri Livitz, Kiran Dhatt-Gauthier, Kyle J. M. Bishop

и другие.

Soft Matter, Год журнала: 2023, Номер 19(46), С. 9017 - 9026

Опубликована: Янв. 1, 2023

Time-varying fields drive the motion of magnetic particles adsorbed on liquid drops due to interfacial constraints that couple torques capillary forces. Such magneto-capillary particle dynamics and associated fluid flows are potentially useful for propelling drop motion, mixing contents, enhancing mass transfer between phases. The design such functions benefits from development validation predictive models. Here, we apply methods Bayesian data analysis identify validate a dynamical model accurately predicts field-driven at interface spherical droplet. Building previous work, consider candidate models describe tilting interface, field-dependent contributions moment, gravitational forces, their combinations. each is informed by tracking Janus sphere moving in precessing field different frequencies angles. We infer uncertain parameters model, criticize ability predict experimental data, select most probable candidate, which accounts forces interface. show how this favored can complex trajectories with micron-level accuracy across range driving considered. discuss knowledge "best" be used experiments inform accurate parameter estimates or achieve desired trajectories.

Язык: Английский

Scaling a Hydraulic Motor for Minimally Invasive Medical Devices DOI Creative Commons
Manjeera Vinnakota, Kishan Bellur, Sandra L. Starnes

и другие.

Micromachines, Год журнала: 2024, Номер 15(1), С. 131 - 131

Опубликована: Янв. 12, 2024

Aligned with the medical device industry's trend of miniaturization, academic and commercial researchers are constantly attempting to reduce sizes. Many applications require miniature actuators (2 mm range) perform mechanical work; however, biocompatible micromotors not readily available. To that end, a hydraulic motor-driven cutting module aims combine drug delivery is presented. The motor prototype developed has an outside diameter (OD) ~4 (twice target size) 1 drive shaft attach cutter. Four different designs were explored fabricated using additive manufacturing. benchtop experimental data prototypes presented herein. For fluid inlet perpendicular blades, average angular velocity was 10,593 RPM at flowrate 3.6 mL/s 42,597 10.1 mL/s. This design numerically modeled 3D-transient simulations in ANSYS CFX (version 2022 R2) determine performance characteristics internal resistance motor. Simplified mathematical models also used compute compare peak torque simulation estimates. viability current represents crucial milestone scaling 2 OD power microcutter.

Язык: Английский

Процитировано

2
Magnetically locked Janus particle clusters with orientation-dependent motion in AC electric fields DOI
Jin Gyun Lee, Cooper P. Thome, Zoe A. Cruse

и другие.

Nanoscale, Год журнала: 2023, Номер 15(40), С. 16268 - 16276

Опубликована: Янв. 1, 2023

Active particles, or micromotors, locally dissipate energy to drive locomotion at small length scales. The type of trajectory is generally fixed and dictated by the geometry composition particle, which can be challenging tune using conventional fabrication procedures. Here, we report a simple, bottom-up method magnetically assemble gold-coated polystyrene Janus particles into "locked" clusters that display diverse trajectories when stimulated AC electric fields. orientation within each cluster gives rise distinct modes locomotion, including translational, rotational, trochoidal, helical, orbital. We model this system simplified rigid beads demonstrate qualitative agreement between predicted experimentally observed trajectories. Overall, provides facile means scalably create micromotors with range well-defined motions from discrete building blocks.

Язык: Английский

Процитировано

6
Complex Dynamics of a Magnetic Microrobot Driven by Single Deformation Soft Tail in Random Environment DOI Creative Commons
Xinpeng Shi, Yongge Li, Yong Xu

и другие.

Theoretical and Applied Mechanics Letters, Год журнала: 2024, Номер 14(5), С. 100534 - 100534

Опубликована: Июль 8, 2024

This study focuses on exploring the complex dynamical behaviors of a magnetic microrobot in random environment. The purpose is to reveal mechanism influence disturbance dynamics. paper establishes stochastic dynamic models for before and after deformation, considering Gaussian white noise. system responses are analyzed via steady-state probability density functions first deformation time. effects different field strengths fluid viscosities movement speed angular velocity studied. results indicate that disturbances can cause microrobots advance compared deterministic case. work contributes design motion control enhances theoretical foundation microrobots.

Язык: Английский

Процитировано

1
Design and batch fabrication of anisotropic microparticles toward small-scale robots using microfluidics: recent advances DOI
Chaoyu Yang, Xurui Liu, Xin Song

и другие.

Lab on a Chip, Год журнала: 2024, Номер 24(19), С. 4514 - 4535

Опубликована: Янв. 1, 2024

This review covers recent advances in the microfluidic preparation of small-scale robots.

Язык: Английский

Процитировано

1
Magneto-capillary particle dynamics at curved interfaces: inference and criticism of dynamical models DOI
Dimitri Livitz, Kiran Dhatt-Gauthier, Kyle J. M. Bishop

и другие.

Soft Matter, Год журнала: 2023, Номер 19(46), С. 9017 - 9026

Опубликована: Янв. 1, 2023

Time-varying fields drive the motion of magnetic particles adsorbed on liquid drops due to interfacial constraints that couple torques capillary forces. Such magneto-capillary particle dynamics and associated fluid flows are potentially useful for propelling drop motion, mixing contents, enhancing mass transfer between phases. The design such functions benefits from development validation predictive models. Here, we apply methods Bayesian data analysis identify validate a dynamical model accurately predicts field-driven at interface spherical droplet. Building previous work, consider candidate models describe tilting interface, field-dependent contributions moment, gravitational forces, their combinations. each is informed by tracking Janus sphere moving in precessing field different frequencies angles. We infer uncertain parameters model, criticize ability predict experimental data, select most probable candidate, which accounts forces interface. show how this favored can complex trajectories with micron-level accuracy across range driving considered. discuss knowledge "best" be used experiments inform accurate parameter estimates or achieve desired trajectories.

Язык: Английский

Процитировано

2