Three stages of Marangoni-driven film spreading for miscible fluids

Three stages of Marangoni-driven film spreading for miscible fluids

The Marangoni-driven film spreading in the fully miscible droplet–reservoir system was experimentally studied. Three stages of film spreading were identified over a relatively long time, with the power-law exponent n (R ∼ tn, R is film radius, t is time) nonmonotonically transitioning from 3/4, to 1...

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Veröffentlicht in:Physics of fluids (1994) 2022-12, Vol.34 (12)
Hauptverfasser: Jia, Feifei, Wang, Tianyou, Peng, Xiaoyun, Sun, Kai
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Sprache:eng
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Diffusion effects
Miscibility
Power law
Spreading
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creator Jia, Feifei
Wang, Tianyou
Peng, Xiaoyun
Sun, Kai
description The Marangoni-driven film spreading in the fully miscible droplet–reservoir system was experimentally studied. Three stages of film spreading were identified over a relatively long time, with the power-law exponent n (R ∼ tn, R is film radius, t is time) nonmonotonically transitioning from 3/4, to 1/4, and back to 3/4. The variation of the Marangoni stress was found to be responsible for the three-stage power-law relationships, with the tangential stretching effect of the expanding liquid–air interface governing stages I and III and the normal diffusion effect dominating stage II. This work presents a unified interpretation of the inconsistent power-law relationships reported from previous studies on Marangoni-driven film spreading for miscible fluids.
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subjects Diffusion effects
Miscibility
Power law
Spreading
title Three stages of Marangoni-driven film spreading for miscible fluids
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