@RahilValani

Leverhulme-Peierls fellow at @OxfordPhysics. Fascinated by active matter 🦠, dynamical systems 🪐 & fluid dynamics 💦.

 Oxford, England
rahilvalani.com
Joined June 2019
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Active Soft-Impact Oscillator: Dynamics of a Walking Droplet in a Non-Smooth Potential Titir Mukherjee, Rahil N Valani, Soumitro Banerjee arxiv.org/abs/2602.05913 [𝚗𝚕𝚒𝚗.𝙲𝙳 𝚙𝚑𝚢𝚜𝚒𝚌𝚜.𝚏𝚕𝚞-𝚍𝚢𝚗]
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Rahil Valani retweeted
Orit Peleg@oritpeleg9 Aug 2025
More on collective behavior: Our new Annual Review of Biophysics piece - with the stellar Danielle Chase - explores how animals sense, share information, and make group decisions. In honeybees and beyond 🐝 annualreviews.org/content/jo…
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Postdoctoral position open in Bacterial-Algal Symbiosis! This interdisciplinary role will involve experimental and theoretical research using microfluidics, microscopy and modelling. Applications close May 13 (Aust. time). Please RT! @SciMelb @UniMelb jobs.unimelb.edu.au/caw/en/j…
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Congratulations to Xinyi for the fist paper from her PhD. This work, together with @PrakashLab, is published in @RSocPublishing today, and examines individual and collective behaviour of magnetotactic bacteria in an oxygen gradient. @SciMelb @MelbMathBio royalsocietypublishing.org/d…

Escape motility of multicellular magnetotactic prokaryotes

Abstract. Microorganisms often actively respond to multiple external stimuli to navigate toward their preferred niches. For example, unicellular magnetotac

royalsocietypublishing.org
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#ICYMI: In wave-particle duality, electrons can become trapped in disordered environments. Now, researchers show that a similar effect can be seen in droplets on a vibrating fluid surface – results that could inform research on #ActiveMatter systems. 🔗 go.aps.org/3zwaFNB
A small liquid droplet hovers above a rippled, light pink and blue fluid surface that takes up the entire image. The droplet is reflected on the surface, and it appears to be at a standstill as the surface ripples interact with it.

ALT A small liquid droplet hovers above a rippled, light pink and blue fluid surface that takes up the entire image. The droplet is reflected on the surface, and it appears to be at a standstill as the surface ripples interact with it.

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Tunneling in a Lorenz-like model for an active wave-particle entity. arxiv.org/abs/2408.13761

Tunneling in a Lorenz-like model for an active wave-particle entity

Active wave-particle entities (WPEs) emerge as self-propelled oil droplets on the free surface of a vibrating oil bath. The particle (droplet) periodically imprints decaying waves on the liquid...

arxiv.org
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R. N. Valani, B. S. Dandogbessi, A dynamical mechanism rooted in the Lorenz system for giant negative and positive mobility of a memory-driven active particle. arXiv [cond-mat.soft] (2024). arxiv.org/abs/2408.00168
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J. Rozman, J. M. Yeomans, Cell sorting in an active nematic vertex model. arXiv [cond-mat.soft] (2024). arxiv.org/abs/2407.19591
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A dynamical mechanism rooted in the Lorenz system for giant negative and positive mobility of a memory-driven active particle. arxiv.org/abs/2408.00168
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PhD position - University of Calabria, Italy (DL July18, start Nov.1st) Students interested in wave-driven particles or quantum analogs (experimental and/or theoretical) can contact me to know on-going research on these topics. #Physics #PhD unical.portaleamministrazion…
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Mermaid Cereal now available open-access @NatureComms! 🧜‍♀️🥣 rdcu.be/dL6Tj We realize a macroscopic 2D SALR system that can be used to probe the fundamentals of equilibrium self-assembly in an accessible tabletop platform.
Harris Lab@FluidDanamics5 Mar 2024
Latest from the #harrislab now on @arxiv! The competition between capillary attraction and magnetic repulsion leads to a tabletop SALR (short-range attraction, long-range repulsion) system, with patterns familiar to analogous microscale systems! 🧜‍♀️🥣 arxiv.org/abs/2403.01097 🧵
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Rahil Valani retweeted
Mazi Jalaal@maziyarj11 Apr 2024
Our article on Mathematical Billiard with Spatial Memory is now out @PhysRevLett journals.aps.org/prl/abstrac… Here is a short thread 🧵on what we have done. Might be of your interest if you like active matter, memory, topology, chaos, etc. or simply mathematical games 👾
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Rarest phenomenon I have ever witnessed! Volcano eruption during a partial eclipse, yes this is flying lava. #volcano #iceland #Eclipse2024
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Check out my Gallery entry! V0033: Absence of Diffusion in Walking Droplets youtu.be/cGD1MX1PkHg?feature… via @YouTube
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In 2000, there were multiple breakthroughs in our understanding of solutions of the #3BodyProblem. One was the discovery of the figure 8 solution, where 3 equal sized stars chase each other around on a figure 8-shaped loop, discovered by Chenciner & Montgomery 1/n arxiv.org/pdf/math/0011268.p…
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On how active matter systems actually work #ActiveMatter #BirdsFlock
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Quantum-like behavior of an active particle in a double-well potential. arxiv.org/abs/2401.05616
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Rahil Valani retweeted
Harris Lab@FluidDanamics7 Nov 2023
Surf's up! 🏄 After being lost at "sea" for several years, our work describing the discovery of the Capillary Surfer system has now made it to shore @PhysRevFluids. doi.org/10.1103/PhysRevFluid… Work led by former #harrislab @brownengin postdoc @gpucci_physics and undergrad @H312Ian.
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By popular demand: Gravitational Billiards! The ball still reflects geometrically off the boundary, but this time does not follow geodesics of the surface, but rather the curves of least action for (uniform, downward) gravity in Newtonian physics.
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Rahil Valani retweeted
Edward Green@jefgreen33 Nov 2023
Really pleased to see this work published, with some counter - intuitive results on stretching fibrous fluid sheets. Great collaboration with Matt Hopwood, Brendan Harding and @RosemaryJDyson journals.aps.org/prfluids/ab…

Thin film extensional flow of a transversely isotropic viscous fluid

Biological materials such as cervical mucus and collagen gel can possess a fibrous microstructure that affects their functional behavior. Using numerical and asymptotic techniques we solve a model...

journals.aps.org
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