@heiseonline@social.heise.de2026-06-08 14:37:02
@arXiv_physicsfludyn_bot@mastoxiv.page2026-05-19 08:13:44
Solutocapillary instability in slipping falling films
Sanghasri Mukhopadhyay, S\'everine Millet, Bastien Di Pierro, Asim Mukhopadhyay
https://arxiv.org/abs/2605.17519 https://arxiv.org/pdf/2605.17519 https://arxiv.org/html/2605.17519
arXiv:2605.17519v1 Announce Type: new
Abstract: We present a comprehensive framework for gravity-driven, surfactant-laden thin films flowing over slippery substrates, elucidating how wall slip modifies the coupled hydrodynamics and interfacial transport. A long-wave model is formulated with a conservative bulk-surface mass balance and a Navier slip condition. The Orr-Sommerfeld eigenvalue problem governs the linear regime, while a weighted-residual model captures the nonlinear evolution over a range of equilibrium surfactant coverages, Marangoni strengths, and adsorption kinetics. The analysis predicts a non-monotonic variation of the critical Reynolds number with equilibrium coverage, exhibiting a maximum at intermediate $\Gamma_e$, and a slip-induced transition from single- to double-hump solitary structures with increasing Marangoni number, accompanied by attenuated capillary ripples. Under fast adsorption kinetics, the surface field homogenizes, preserving the mean film shape and flux while flattening both the surface concentration $\Gamma$ and the bulk inventory $\chi h\phi$. A spurious interfacial mass growth reported by Pascal et al.(PRF, 2019) and D'Alessio et al.(JFM, 2020) is resolved through a revised surface balance ensuring strict conservation. Wall slip thus emerges as a key control parameter, reducing viscous resistance and mitigating Marangoni back-stress. The slip parameter $\beta$ is a useful control knob for surfactant-laden films. Slip prevents fragile multi-hump bound states, promoting a single broad crest or an almost flat, uniform sheet by carefully bonding $\beta$ to wave selection, ripple damping, and the bulk-surface surfactant balance.
toXiv_bot_toot
@Tuxramus@social.linux.pizza2026-06-16 08:35:11
Set sail! 🧭 Heading back into the world of Windrose today. Pull up a chair and come hang out! 🔴 Live here:
🎮 #Windrose
@heiseonline@social.heise.de2026-05-11 12:01:01
Learntec 2026: Den Stöpsel gezogen?
Wenn man sich an das Ende der CeBIT während der Learntec erinnert, ist das ein nicht so gutes Zeichen. Die eingetrübte Stimmung hat aber nicht nur einen Grund.
https://www.
@macandi@social.heise.de2026-07-07 11:01:00
@bici@mastodon.social2026-07-11 04:45:12
@nelson@tech.lgbt2026-06-08 15:56:45
I have a new favorite pickle: Britt's Pickles. Lovely very sour ferment and not at all shy about the flavoring. Lots of chile heat and some mustard seed in with the usuals. They're on Whidbey Island but my California grocery carries them.
@heiseonline@social.heise.de2026-05-04 07:16:00
Android Auto: Instabile Verbindungen seit Android-16-Updates
Wenn es häufiger zu Verbindungsabbrüchen in Android Auto mit Samsung- oder Pixel-Smartphones kommt, könnte Android 16 der Auslöser sein.
https://www.
@heiseonline@social.heise.de2026-06-29 13:03:00
