Oscillation and collective behavior in convective flows

Autor:	A. Gergely, Cs. Paizs, R. Tötös, Z. Néda
Jazyk:	angličtina
Rok vydání:	2021
Předmět:	Fluid Flow and Transfer Processes Physics::Fluid Dynamics Mechanics of Materials Mechanical Engineering Fluid Dynamics (physics.flu-dyn) Computational Mechanics FOS: Physical sciences Physics - Fluid Dynamics Condensed Matter Physics
Popis:	Oscillation and collective behavior in convection-driven fluid columns are investigated and discussed in analogy with similar phenomenon observed for the flickering flames of candle bundles. It is shown experimentally that an ascending circular Helium gas column performs an oscillation which is similar in several aspects to the oscillation of diffusion flames. Increasing the nozzle diameter leads to a decrease in the oscillation frequency, while increasing the flow rate results in an increase in this frequency. For helium columns oscillating at nearby frequency and placed close to each other anti-phase synchronization and beating phenomena is observed. A simple toy-model based on elementary hydrodynamics describes the observed oscillations and leads to oscillation frequencies in the right order of magnitude. 10 pages, 10 Figures, Latex
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aec6f361375b8907f85efff4bc46381b http://arxiv.org/abs/2109.10286 Zobrazit plný text záznamu