Formation of a single drop of molten steel following bursting of liquid film in a vertical steel plate illuminated by a high energy laser

Lanzerotti, Mary; Brakke, Kenneth A.; Allen, Kenneth S.; Blackmon, William; Hartke, John P.; Hirsa, Amir

doi:10.1007/s00339-021-04680-w

Cited by 4 publications

(2 citation statements)

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“…With the help of the modified fast-slow decomposition analysis method, one can also analyze the mechanism of different bursting behaviors of high-dimensional system on different subplanes as well as the synchronization problems. In addition, as we know, bursting oscillations also have the other application scenarios, such as circuit parameter configurations [41,42], energy harvesting [43,44], spatiotemporal communications [45,46] and laser signal analysis [47,48]. In the future, the applications and control of the bursting patterns obtained in this paper will be investigated.…”

Section: Discussionmentioning

confidence: 79%

Analysis on the symmetric fast-slow behaviors in a van der Pol-Duffing-Jerk oscillator

Lyu,

Li,

Huang

et al. 2023

Phys. Scr.

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The study of bursting oscillations induced by frequency-domain multiscale effect is one of the key scientific issues in the theoretical analysis of circuit systems. In this paper, we explore the mechanism of the bursting oscillations of a van der Pol-Duffing-Jerk circuit oscillator with slow-changing parametric and external periodic excitations. Three typical bursting modes, namely, left-right symmetric “subHopf/fold limit cycle” bursting, origin symmetric “fold/fold limit cycle” bursting and origin symmetric “fold/subHopf/fold limit cycle” bursting, are presented. The slowly changing excitation is treated as a generalized state variable to analyze the influence on the critical manifolds of the equilibria and bifurcations. The critical conditions of fold and Hopf bifurcations are computed by using the bifurcation theory, and two typical bifurcation structures are obtained according to the position of different bifurcation curves. Based on the bifurcation analysis, we investigate the appearance and dynamicalal evolutions of the different bursting oscillations with the variation of the external excitation amplitude. It is pointed that not only the bifurcation structures but also the distance between the fold and Hopf bifurcation points can affect the bursting patterns. We find the directions of the trajectories and the bursting types are sensitive to the values of the external excitation amplitude. Furthermore, we reveal the mechanism of the bursting oscillations by overlapping the trajectories on (,x)-plane onto the corresponding bifurcation structures. Numerical simulations are also presented to prove the correctness of the theoretical analysis in our study.

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Section: Discussionmentioning

confidence: 79%

Analysis on the symmetric fast-slow behaviors in a van der Pol-Duffing-Jerk oscillator

Lyu,

Li,

Huang

et al. 2023

Phys. Scr.

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“…Flow within drops produces a 3D flow geometry that provides a useful, and physically-rich scenario for developing novel velocimetry methods. Further, drop research is central to many developing technologies including biological assays, (Garcia-Cordero and Fan, 2017;Guo et al, 2012;Kaminski and Garstecki, 2017) droplet and contact line PTV, (Bautista-Capetillo et al, 2014;de Cerqueira et al, 2023;Fischer et al, 2022;Humphrey et al, 1974;Kvon et al, 2020;Trantum et al, 2013) material actuators, (Malouin Jr et al, 2011;Vogel and Steen, 2010) adaptive optics, (Dean and Hirsa, 2015;López and Hirsa, 2008;López et al, 2005;Tyson and Frazier, 2022) and manufacturing (Gilani et al, 2021;Lanzerotti et al, 2021;Murr and Johnson, 2017;Scheithauer et al, 2017;Schuöcker et al, 2012) methods. The study of drop fluid dynamics is uniquely suited to experimentation in microgravity.…”

Section: Introductionmentioning

confidence: 99%

Single-camera PTV within interfacially sheared drops in microgravity

McMackin

Adam

Riley

et al. 2023

Preprint

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Development of experimental methods for in situ particle tracking velocimetry (PTV) is fundamental for allowing measurement of moving systems non-tailored for velocimetry. This investigation focuses on the development of a post-processing methodology for single-camera PTV, without laser-sheet illumination, tracking native air-bubbles as tracer particles within a liquid drop of human insulin in microgravity. This PTV scenario was facilitated by microgravity technology known as the ring-sheared drop (RSD), aboard the International Space Station, which produced an optical imaging scenario and fluid flow geometry suitable as a testbed for PTV research. The post processing methodology performed included five steps: (i) physical system characterization and native air-bubble tracer identification, (ii) image projection and single-camera calibration, (iii) depth determination and 3D particle position determination, (iv) ray tracing and refraction correction, and (v) particle history and data expansion for suboptimal particles. Overall, this post processing methodology successfully allowed for a total of 1,085 particle measurements in a scenario where none were previously possible. Such post processing methodologies have promise for application to other in situ PTV scenarios allowing better understanding of physical systems whose flow is difficult to measure and or where PTV-specific optical elements (such as laser lights sheets and dual camera setups) are not permissible due to physical or safety constraints.

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