Outputs (13)

Nonlinear free-decay oscillations of a magnetically levitated air bubble in water produced by coalescence (2025)
Journal Article
Hunter-Brown, G., Sampara, N., Scase, M. M., & Hill, R. .. A. (in press). Nonlinear free-decay oscillations of a magnetically levitated air bubble in water produced by coalescence. Physical Review Fluids, https://doi.org/10.1103/qxcs-8t7l

Magnetic levitation is used for the first time to study freely suspended air bubbles in water, in particular the transient nonlinear shape oscillations of bubbles newly formed from the coalescence of two parent bubbles. Since we find that this method... Read More about Nonlinear free-decay oscillations of a magnetically levitated air bubble in water produced by coalescence.

Using an electrically charged mist to visualize the potential wells in “sonomaglev,” a combined diamagnetic-acoustic levitator (2024)
Journal Article
Hunter-Brown, G., Sampara, N., Scase, M. M., & Hill, R. J. A. (2024). Using an electrically charged mist to visualize the potential wells in “sonomaglev,” a combined diamagnetic-acoustic levitator. Applied Physics Letters, 125(17), Article 174101. https://doi.org/10.1063/5.0226729

We use a water mist to experimentally visualize the wells in the potential energy of material levitated by a combined diamagnetic-acoustic levitator. The levitator consists of an 18.5 T superconducting magnet, which can levitate diamagnetic material,... Read More about Using an electrically charged mist to visualize the potential wells in “sonomaglev,” a combined diamagnetic-acoustic levitator.

Sonomaglev: Combining acoustic and diamagnetic levitation (2023)
Journal Article
Hunter-Brown, G., Sampara, N., Scase, M. M., & Hill, R. J. (2023). Sonomaglev: Combining acoustic and diamagnetic levitation. Applied Physics Letters, 122(1), Article 014103. https://doi.org/10.1063/5.0134297

Acoustic levitation and diamagnetic levitation are experimental methods that enable the contact-free study of both liquid droplets and solid particles. Here, we combine both the techniques into a single system that takes advantage of the strengths of... Read More about Sonomaglev: Combining acoustic and diamagnetic levitation.

Cylindrical rotating Rayleigh-Taylor instability (2020)
Journal Article
Scase, M. M., & Sengupta, S. (2021). Cylindrical rotating Rayleigh-Taylor instability. Journal of Fluid Mechanics, 907, Article A33. https://doi.org/10.1017/jfm.2020.842

We consider a spun-up system of an inner cylinder of fluid surrounded by an outer fluid layer within a rotating cylindrical container, in the absence of gravity. The outer layer may be of differing density and viscosity to the inner layer. If the inn... Read More about Cylindrical rotating Rayleigh-Taylor instability.

Magnetically induced Rayleigh-Taylor instability under rotation: Comparison of experimental and theoretical results (2020)
Journal Article
Scase, M., Baldwin, K., & Hill, R. (2020). Magnetically induced Rayleigh-Taylor instability under rotation: Comparison of experimental and theoretical results. Physical Review E, 102(4), Article 043101. https://doi.org/10.1103/PhysRevE.102.043101

© 2020 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the a... Read More about Magnetically induced Rayleigh-Taylor instability under rotation: Comparison of experimental and theoretical results.

Centrifugally forced Rayleigh–Taylor instability (2018)
Journal Article
Scase, M. M., & Hill, R. J. (2018). Centrifugally forced Rayleigh–Taylor instability. Journal of Fluid Mechanics, 852, 543-577. https://doi.org/10.1017/jfm.2018.539

We consider the effect of high rotation rates on two liquid layers that initially form concentric cylinders, centred on the axis of rotation. The configuration may be thought of as a fluid-fluid centrifuge. There are two types of perturbation to the... Read More about Centrifugally forced Rayleigh–Taylor instability.

Spherical vortices in rotating fluids (2018)
Journal Article
Scase, M. M., & Terry, H. L. (2018). Spherical vortices in rotating fluids. Journal of Fluid Mechanics, 846, Article R4-1-R4-12. https://doi.org/10.1017/jfm.2018.334

A popular model for a generic fat-cored vortex ring or eddy is Hill's spherical vortex (Phil. Trans. Roy. Soc. A vol. 185, 1894, p. 213). This well-known solution of the Euler equations may be considered a special case of the doubly-infinite family... Read More about Spherical vortices in rotating fluids.

Magnetically Induced Rotating Rayleigh-Taylor Instability (2017)
Journal Article
Scase, M. M., Baldwin, K. A., & Hill, R. J. (2017). Magnetically Induced Rotating Rayleigh-Taylor Instability. Journal of Visualized Experiments, https://doi.org/10.3791/55088

Classical techniques for investigating the Rayleigh-Taylor instability include using compressed gasses, rocketry or linear electric motors to reverse the effective direction of gravity, and accelerate the lighter fluid toward the denser fluid. Other... Read More about Magnetically Induced Rotating Rayleigh-Taylor Instability.

Rotating Rayleigh-Taylor instability (2017)
Journal Article
Scase, M. M., Baldwin, K. A., & Hill, R. J. (2017). Rotating Rayleigh-Taylor instability. Physical Review Fluids, 2(2), Article 024801. https://doi.org/10.1103/PhysRevFluids.2.024801

© 2017 American Physical Society. The effect of rotation upon the classical Rayleigh-Taylor instability is investigated. We consider a two-layer system with an axis of rotation that is perpendicular to the interface between the layers. In general, we... Read More about Rotating Rayleigh-Taylor instability.

The inhibition of the Rayleigh-Taylor instability by rotation (2015)
Journal Article
Baldwin, K. A., Scase, M. M., & Hill, R. J. (2015). The inhibition of the Rayleigh-Taylor instability by rotation. Scientific Reports, 5(11706), https://doi.org/10.1038/srep11706

It is well-established that the Coriolis force that acts on fluid in a rotating system can act to stabilise otherwise unstable flows. Chandrasekhar considered theoretically the effect of the Coriolis force on the Rayleigh-Taylor instability, which oc... Read More about The inhibition of the Rayleigh-Taylor instability by rotation.