Modulation of Marangoni convection in liquid films

Gambaryan‐Roisman, Tatiana

doi:10.1016/j.cis.2015.02.003

Cited by 44 publications

(27 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These modes of instability are today referred to as short-scale and long-scale Marangoni instability, respectively [37,38]. While surface deformability is no necessary condition for short-scale Marangoni instability, it is intrinsic for long-scale instabilities and may lead to partial dewetting [37,39]. Both instability modes may interact [38].…”

Section: Thermally Induced Marangoni Convectionmentioning

confidence: 99%

“…They further suggest that naturally occurring lateral perturbations in evaporation rate might have a direct impact on convective instabilities in evaporating pure liquid films. For more information regarding thermally-induced Marangoni convection, the readers are referred to several comprehensive reviews on the matter in References [35,39,42,43].…”

Section: Thermally Induced Marangoni Convectionmentioning

confidence: 99%

See 1 more Smart Citation

Critical Solutal Marangoni Number Correlation for Short-Scale Convective Instabilities in Drying Poly(vinyl acetate)-Methanol Thin Films

2021

View full text Add to dashboard Cite

A new empiric correlation for the critical solutal Marangoni number as function of the Péclet and Schmidt numbers is proposed. It is based on previously published experimental flow field data in drying poly(vinyl acetate)-methanol films with an initial thickness in the range of – and an initial solvent load of to , as well as newly derived concentration profile measurements and 1D drying simulations. The analysis accounts for realistic transient material properties and describes the occurrence of short-scale convective Marangoni (in)stabilities during the entire drying process with an accuracy of 9%. In addition, the proposed correlation qualitatively follows trends known from theory. As convective Marangoni instabilities in drying polymer films may induce surface deformations, which persist in the dry film, the correlation may facilitate future process design for either thin films with uniform thickness or deliberate self-assembly.

show abstract

Section: Thermally Induced Marangoni Convectionmentioning

confidence: 99%

Section: Thermally Induced Marangoni Convectionmentioning

confidence: 99%

Critical Solutal Marangoni Number Correlation for Short-Scale Convective Instabilities in Drying Poly(vinyl acetate)-Methanol Thin Films

2021

View full text Add to dashboard Cite

show abstract

“…(59) was considered for the IL layer. In case of low applied potential (less than 25 mV), the Debye Hückel approximation [10,30,31] is used to linearize the Poisson-Boltzmann equation (Eq. (80)).…”

Section: Ionic Conductive Film and Perfect Dielectric Bounding Mediamentioning

confidence: 99%

“…Surface instabilities can be either triggered using external mechanical, thermal, and electrical forces or via intermolecular interactions like van der Waals forces [9][10][11]. Development of these instabilities leads to the film disruption and formation of patterns, which is of interest in many applications.…”

Section: Introductionmentioning

confidence: 99%

Electrified Pressure-Driven Instability in Thin Liquid Films

Nazaripoor¹,

Riad²,

Sadrzadeh³

2018

Electric Field

View full text Add to dashboard Cite

The electrified pressure-driven instability of thin liquid films, also called electrohydrodynamic (EHD) lithography, is a pattern transfer method, which has gained much attention due to its ability in the fast and inexpensive creation of novel micro-and nanosized features. In this chapter, the mathematical model describing the dynamics and spatiotemporal evolution of thin liquid film is presented. The governing hydrodynamic equations, intermolecular interactions, and electrostatic force applied to the film interface and assumptions used to derive the thin film equation are discussed. The electrostatic conjoining/disjoining pressure is derived based on the long-wave limit approximation since the film thickness is much smaller than the characteristic wavelength for the growth of instabilities. An electrostatic model, called an ionic liquid (IL) model, is developed which considers a finite diffuse electric layer with a comparable thickness to the film. This model overcomes the lack of assuming very large and small electrical diffuse layer, as essential elements in the perfect dielectric (PD) and the leaky dielectric (LD) models, respectively. The ion distribution within the IL film is considered using the Poisson-Nernst-Planck (PNP) model. The resulting patterns formed on the film for three cases of PD-PD, PD-IL, and IL-PD double layer system are presented and compared.

show abstract

“…In pure liquid films without evaporation, different geometries of convection cells [7], surface deformation due to (locally) heated substrates [8,9], or substrates with non-uniform thermal conductivity [10] have been investigated. The reviews by Oron et al (1997), Craster and Matar (2009), and Gambaryan-Roisman (2015) give an overview of the experimental, theoretical as well as numerical work on the dynamics of liquid films [11][12][13]. Their focus, however, lies on pure liquids, mainly without evaporation.…”

mentioning

confidence: 99%

Calibration Routine for Quantitative Three-Dimensional Flow Field Measurements in Drying Polymer Solutions Subject to Marangoni Convection

Tönsmann

Kröhl

Cavadini

et al. 2019

Colloids and Interfaces

View full text Add to dashboard Cite

Surface-tension induced flows may have a significant impact on the surface topography of thin films or small printed structures derived from polymer solution processing. Despite a century of research on Marangoni convection, the community lacks quantitative experimental flow field data, especially from within drying solutions. We utilize multifocal micro particle tracking velocimetry (µPTV) to obtain these data and show a calibration routine based on point spread function (PSF) simulations as well as experimental data. The results account for a varying sample refractive index, beneficial cover-glass correction collar settings as well as a multifocal lens system. Finally, the calibration procedure is utilized exemplarily to reconstruct a three-dimensional, transient flow field within a poly(vinyl acetate)-methanol solution dried with inhomogeneous boundary conditions.

show abstract

Modulation of Marangoni convection in liquid films

Cited by 44 publications

References 66 publications

Critical Solutal Marangoni Number Correlation for Short-Scale Convective Instabilities in Drying Poly(vinyl acetate)-Methanol Thin Films

Critical Solutal Marangoni Number Correlation for Short-Scale Convective Instabilities in Drying Poly(vinyl acetate)-Methanol Thin Films

Electrified Pressure-Driven Instability in Thin Liquid Films

Calibration Routine for Quantitative Three-Dimensional Flow Field Measurements in Drying Polymer Solutions Subject to Marangoni Convection

Contact Info

Product

Resources

About