Exponential Growth of Fingering Instabilities of Spreading Films Under Horizontal Thermal Gradients

Autor:	Françoise Brochard-Wyart, J. B. Brzoska, F. Rondelez
Rok vydání:	1992
Předmět:	Materials science business.industry General Physics and Astronomy Mechanics Raising (metalworking) Physics::Fluid Dynamics Wavelength Temperature gradient Optics Exponential stability Exponential growth Ribbon Thermal sense organs business Spinning
Zdroj:	Europhysics Letters (EPL). 19:97-102
ISSN:	1286-4854 0295-5075
Popis:	A thin liquid ribbon deposited on a wettable surface and subjected to a horizontal thermal gradient develops periodic fingers towards the cold region. We present an observation of the exponential growth regime, expected at early times, but not accessible in other driven fingering patterns induced by gravitational flows, spinning drops, or vertical thermal gradients. We have monitored the wavelength λ and the raising time τ of the unstable mode of undulation of the contact line; we find that λτ2 is independent of the ribbon thickness, in agreement with a linear stability analysis.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a8e2a9d548c4aebf624a0f4ffbb1091a https://doi.org/10.1209/0295-5075/19/2/007 Zobrazit plný text záznamu