Skip to Main content Skip to Navigation
Theses

Caractérisation des phénomènes hydrodynamiques lors de l'impact de gouttes sur différents types de substrats

Abstract : The main goal of this work is the understanding of physical mechanism related to the orthogonal impact phenomena of one or several drops onto solid and dry surfaces. Model surfaces used are made using silicon plate on which ones chemical treatment allowed to reach equilibrium contact angles covering a wide range from hydrophilic to super hydrophobic. Thanks to this technique, different kinds of heterogeneous substrate have been built and the influence of their behavior is studied.
These experiments are based on acquiring transient profiles during impact process of one or several drops. Visualization techniques used are high speed cinematography and pseudo-cinematography with phase shifts. Measurements are automatically made from algorithms of image processing specifically developed for wetting mechanism. These observations allowed to study in details the four different phases of drop impact.
From these results, two applications, where solid/liquid interaction has a preponderant role, have been investigated: digital printing and in situ DNA synthesis. Proposed numerical simulations are based on variational method and boundary element method. The obtained results are discussed.
Complete list of metadatas

https://tel.archives-ouvertes.fr/tel-00178665
Contributor : Damien Vadillo <>
Submitted on : Thursday, October 11, 2007 - 7:52:35 PM
Last modification on : Thursday, November 19, 2020 - 3:54:10 PM
Long-term archiving on: : Thursday, September 27, 2012 - 1:00:39 PM

Identifiers

  • HAL Id : tel-00178665, version 1

Collections

CNRS | UJF | LEGI | UGA

Citation

Damien Vadillo. Caractérisation des phénomènes hydrodynamiques lors de l'impact de gouttes sur différents types de substrats. Dynamique des Fluides [physics.flu-dyn]. Université Joseph-Fourier - Grenoble I, 2007. Français. ⟨tel-00178665⟩

Share

Metrics

Record views

468

Files downloads

2816