Imperial College London

ProfessorChristosMarkides

Faculty of EngineeringDepartment of Chemical Engineering

Professor of Clean Energy Technologies
 
 
 
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Contact

 

+44 (0)20 7594 1601c.markides Website

 
 
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Location

 

404ACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Denner:2016:10.1103/PhysRevE.93.033121,
author = {Denner, F and Pradas, M and Charogiannis, A and Markides, C and van, Wachem B and Kalliadasis, S},
doi = {10.1103/PhysRevE.93.033121},
journal = {Physical Review E},
title = {Self-similarity of solitary waves on inertia-dominated falling liquid films},
url = {http://dx.doi.org/10.1103/PhysRevE.93.033121},
volume = {93},
year = {2016}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - We propose consistent scaling of solitary waves on inertia-dominated falling liquid films, which accurately accounts for the driving physical mechanisms and leads to a self-similar characterization of solitary waves. Direct numerical simulations of the entire two-phase system are conducted using a state-of-the-art finite volume framework for interfacial flows in an open domain that was previously validated against experimental film-flow data with excellent agreement. We present a detailed analysis of the wave shape and the dispersion of solitary waves on 34 different water films with Reynolds numbers Re=20–120 and surface tension coefficients σ=0.0512–0.072Nm−1 on substrates with inclination angles β=19–90. Following a detailed analysis of these cases we formulate a consistent characterization of the shape and dispersion of solitary waves, based on a newly proposed scaling derived from the Nusselt flat film solution, that unveils a self-similarity as well as the driving mechanism of solitary waves on gravity-driven liquid films. Our results demonstrate that the shape of solitary waves, i.e., height and asymmetry of the wave, is predominantly influenced by the balance of inertia and surface tension. Furthermore, we find that the dispersion of solitary waves on the inertia-dominated falling liquid films considered in this study is governed by nonlinear effects and only driven by inertia, with surface tension and gravity having a negligible influence.
AU - Denner,F
AU - Pradas,M
AU - Charogiannis,A
AU - Markides,C
AU - van,Wachem B
AU - Kalliadasis,S
DO - 10.1103/PhysRevE.93.033121
PY - 2016///
SN - 1539-3755
TI - Self-similarity of solitary waves on inertia-dominated falling liquid films
T2 - Physical Review E
UR - http://dx.doi.org/10.1103/PhysRevE.93.033121
UR - http://hdl.handle.net/10044/1/30395
VL - 93
ER -