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Utilizing sliding mode control for the cavitation phenomenon and using the obtaining result in modern medicine
2019
SN Applied Sciences
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Our main objective is to design a stabilizing controller that is able to regulate the radius of the bubble to the desired radius. At first, traditional sliding mode controller is proposed. ...
The second part of this paper is devoted to the design of the sliding mode controller for the bubble system, where the ultrasonic pressure plays the role of control input and the output is the bubble radius ...
Human and animal rights Research involving no human participants and/or animals. The manuscript is processed through proper channel. ...
doi:10.1007/s42452-019-1435-y
fatcat:mpw4sedarfag3kxauczvpfpwd4
Stabilization of Multi-electron Bubbles in Superfluid Helium
2014
Journal of Physics, Conference Series
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MEBs were extracted from the electron filled vapor sheath of a heated filament loop embedded in the superfluid helium and observed by high-speed photography. ! ...
Electrons move in angular momentum states; deformations of the surface are called spherical ripplons. The attractive electron-ripplon interaction leads to an unusual form of superconductivity. ...
in the form of a single bubble. ...
doi:10.1088/1742-6596/568/1/012016
fatcat:beow2zn6dbaypfc3nt7tsh734m
Resolving the Pinning Force of Nanobubbles with Optical Microscopy
2017
Physical Review Letters
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FIG. 4 . 4 Stability of the neck pulled from a bubble. ...
Simultaneous AFM-TIRFM images [Figs. 1(b) and 1(c)] of a 20 × 20 μm 2 area show the advantages of each imaging mode. Optical microscopy allows dynamic imaging over areas of ∼100 × 100 μm 2 . ...
doi:10.1103/physrevlett.118.054501
pmid:28211735
fatcat:df3jrhgqsjexhnc2rzauw37lm4
Shape oscillations of particle-coated bubbles and directional particle expulsion
2017
Soft Matter
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A decomposition of the non-spherical shape in spatial Fourier modes reveals that the interplay of different modes determines the locations of particle expulsion. ...
We perform high-speed visualisation of the interface shape and of the particle distribution during ultrafast deformation at a rate of up to 10 4 s À1 . ...
Image analysis We assume that the bubble shape has an axis of symmetry, so that each surface mode is characterised by a single integer n, corresponding to the number of undulations along the bubble contour ...
doi:10.1039/c6sm01603k
pmid:27714376
pmcid:PMC5304335
fatcat:iw32h3dkjrecdektplgvquzcqu
Hovering Control of A Submersible Transformer Inspection Robot Based on the ASMBC Method
2020
IEEE Access
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INDEX TERMS Oil-immersed transformer, robot, dynamic model, sliding mode backstepping control. ...
Then, an adaptive sliding mode backstepping control (ASMBC) is used to design the cascade control system. The cascade control system consists of the depth control and the yaw control. ...
The contrasts between single neuron PID controller and adaptive sliding mode backstepping controller in the depth control are shown in Fig. 15 and 16 . ...
doi:10.1109/access.2020.2989378
fatcat:2kbnvp5duzd3nojlufaogcdora
Probing the Mechanical Strength of an Armored Bubble and Its Implication to Particle-Stabilized Foams
2016
Physical Review X
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In this paper, we reduce the problem of foam stability to the study of the behavior of a single spherical bubble coated with a monolayer of solid particles. ...
Bubbles are dynamic objects that grow and rise or shrink and disappear, often on the scale of seconds. ...
Here, we make quantitative measurements of the stability and buckling of a single spherical air bubble, as it dissolves into the surrounding liquid. ...
doi:10.1103/physrevx.6.011010
fatcat:iyypq2cabbcgbpxn6sqcplex5i
Stability of bubbles in wax-based oleofoams: decoupling the effects of bulk oleogel rheology and interfacial rheology
2020
Rheologica Acta
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We study the dissolution behaviour of single bubbles using microscopy on a temperature-controlled stage. ...
We compare the behaviour of a bubble embedded in an oleofoam, which owes its stability to both bulk and interfacial rheology, to that of a bubble extracted from the oleofoam and resuspended in oil, for ...
Morrison contributed experiments on oleofoam formation and stability, and bubble dissolution. ...
doi:10.1007/s00397-020-01192-x
fatcat:fqxp7ng6bjb3xl63uhw5gktygm
Frequency Domain Specifications Based Robust Decentralized PI/PID Control Algorithm for Benchmark Variable-Area Coupled Tank Systems
2022
Sensors
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A decentralized PI/PID controller based on the frequency domain analysis for two input two output (TITO) coupled tank systems is exploited in this paper. ...
The fundamentals of the gain margin and phase margin are used to design the proposed PI/PID controller. The basic objective is to keep the tank at the predetermined level. ...
In [18] , a hybrid controller comprising of a sliding mode technique and a state feedback algorithm for a quadruple tank system is presented. ...
doi:10.3390/s22239165
pmid:36501864
pmcid:PMC9741177
fatcat:l5w27tdgwfh6fj4sbzpsffq7iu
Surface nanobubbles and nanodroplets
2015
Reviews of Modern Physics
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in and out of nanofluidic devices, and for plasmonic bubbles, vapor nanobubbles, and energy conversion. ...
Studying the nucleation, growth, and dissolution dynamics of surface nanobubbles and nanodroplets will shed new light on the problems of contact line pinning and contact angle hysteresis on the submicron ...
L. acknowledges continuous support from FOM and STW, both of which are part of The Netherlands Organisation for Scientific Research (NWO), from ERC via an Advanced Grant, and from the NWO Zwartekracht ...
doi:10.1103/revmodphys.87.981
fatcat:sb7gjbtvmzdflpspymuj6umeqq
Enhancing acoustic cavitation using artificial crevice bubbles
2015
Ultrasonics
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It is found that above an acoustic pressure threshold the dynamics of the liquid-gas meniscus switches from a stable drum-like vibration to expansion and deformation, frequently resulting in detachment ...
At elevated input powers bubble detachment becomes more frequent and cavitation bubble clouds are formed and remain in the vicinity of the pit bubble. ...
D.F.R research was supported by the Technology Foundation STW, Applied Science Division of NWO and the Technology Programme of the Ministry of Economic Affairs, The Netherlands. ...
doi:10.1016/j.ultras.2014.10.002
pmid:25455191
fatcat:zzwl3njb5bf5vlqa5zwpcgheaq
Dynamics of entrapped microbubbles with multiple openings
[article]
2021
arXiv
pre-print
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The existing analytical models derived for spherical bubbles are incapable of predicting the dynamics of bubbles in such configurations. ...
The natural frequencies and the correlated normal vibration modes are calculated, which are subsequently used to compute the acoustic streaming patterns and the associated thrust by a finite element simulation ...
Center of MicroNano Technology (CMi) staff for their technical assistance, and members of the Microbiorobotic Systems (MICROBS) Laboratory for their intellectual feedback. ...
arXiv:2110.06604v1
fatcat:2e4dqaefkzcdlpuueaf36wbu7q
On the dynamics and breakup of a bubble rising in a turbulent flow
2011
Physics of Fluids
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and breakup of a bubble immersed in a turbulent flow ...
is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. ...
The stability of the LED plates illumination is very good, and a single threshold of −0.20 has been used for all the images. ...
doi:10.1063/1.3648035
fatcat:kgafjwed4jbstnzemab25lryeq
3D printed acoustically programmable soft microactuators
[article]
2022
arXiv
pre-print
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Coupling the dynamics of bubble oscillators reveals rich acoustofluidic interactions that can be programmed in space and time. ...
These basic micromechanical systems will serve as the building blocks for the development of a novel class of untethered soft microrobots powered and controlled by acoustic signals. ...
Pedro Reis for fruitful discussions, and Furkan Ayhan for his assistance with electron microscopy imaging. ...
arXiv:2205.12625v1
fatcat:imjlvvuonrgwjnomzv6pzz3ipu
ON THE MECHANISM OF BUBBLE INDUCED FORCED CONVECTIVE HEAT TRANSFER ENHANCEMENT
2018
Frontiers in Heat and Mass Transfer
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This article presents both an experimental and numerical study of both stationary and sliding bubbles in a horizontal duct with forced convection heat transfer. ...
The experimental temperature field in the span-wise direction is first compared to the numerically calculated temperature field of a bubble sliding near a wall and second to the temperature field calculated ...
Two Stationary Spherical Bubbles The presence of bubbles sliding in the wake of a stationary bubble, as is the case in the experiment, should be accounted for in heat transfer enhancement. ...
doi:10.5098/hmt.11.1
fatcat:docb24gjljgxjga3sauiazpfjy
Effect of overpressure and pulse repetition frequency on cavitation in shock wave lithotripsy
2002
Journal of the Acoustical Society of America
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The effects of PRF and overpressure on bubble dynamics and lifetimes were studied experimentally with passive cavitation detection, high-speed photography, and B-mode ultrasound and theoretically. ...
In contrast to cavitation in water, high-speed photography showed that overpressure did not suppress cavitation of bubbles stabilized on a cracked surface. ...
Lingeman ͑Methodist-Clarian Hospital͒ and Dr. Andrew P. Evan ...
doi:10.1121/1.1500754
pmid:12243163
fatcat:kizlbfwtxnhbrjyxiwirlro244
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