Imperial College London

ProfessorSerafimKalliadasis

Faculty of EngineeringDepartment of Chemical Engineering

Prof in Engineering Science & Applied Mathematics
 
 
 
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Contact

 

+44 (0)20 7594 1373s.kalliadasis Website

 
 
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Assistant

 

Miss Jessica Baldock +44 (0)20 7594 5699

 
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Location

 

411ACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

179 results found

Dallaston MC, Fontelos MA, Tseluiko D, Kalliadasis Set al., 2018, Discrete self-similarity in interfacial hydrodynamics and the formation of iterated structures, Phys. Rev. Lett., Vol: 120

The formation of iterated structures, such as satellite and sub-satellitedrops, filaments and bubbles, is a common feature in interfacial hydrodynamics.Here we undertake a computational and theoretical study of their origin in thecase of thin films of viscous fluids that are destabilized by long-rangemolecular or other forces. We demonstrate that iterated structures appear as aconsequence of discrete self-similarity, where certain patterns repeatthemselves, subject to rescaling, periodically in a logarithmic time scale. Theresult is an infinite sequence of ridges and filaments with similarityproperties. The character of these discretely self-similar solutions as theresult of a Hopf bifurcation from ordinarily self-similar solutions is alsodescribed.

JOURNAL ARTICLE

Denner F, Charogiannis A, Pradas M, Markides CN, van Wachem BGM, Kalliadasis Set al., 2018, Solitary waves on falling liquid films in the inertia-dominated regime, JOURNAL OF FLUID MECHANICS, Vol: 837, Pages: 491-519, ISSN: 0022-1120

JOURNAL ARTICLE

Duran-Olivencia MA, Yatsyshin P, Kalliadasis S, Lutsko JFet al., 2018, General framework for nonclassical nucleation, NEW JOURNAL OF PHYSICS, Vol: 20, ISSN: 1367-2630

JOURNAL ARTICLE

Lin T-S, Tseluiko D, Blyth MG, Kalliadasis Set al., 2018, Continuation methods for time-periodic travelling-wave solutions to evolution equations, APPLIED MATHEMATICS LETTERS, Vol: 86, Pages: 291-297, ISSN: 0893-9659

JOURNAL ARTICLE

Nold A, González MacDowell L, Sibley DN, Goddard BD, Kalliadasis Set al., 2018, The vicinity of an equilibrium three-phase contact line using density-functional theory: density profiles normal to the fluid interface, Molecular Physics, Pages: 1-5, ISSN: 0026-8976

The paper by Nold et al. [Phys. Fluids 26 (7), 072001 (2014)] examined density profiles and the micro-scale structure of an equilibrium three-phase (liquid–vapour–solid) contact line in the immediate vicinity of the wall using elements from the statistical mechanics of classical fluids, namely density-functional theory. The present research note, building on the above work, further contributes to our understanding of the nanoscale structure of a contact line by quantifying the strong dependence of the liquid–vapour density profile on the normal distance to the interface, when compared to the dependence on the vertical distance to the substrate. A recent study by Benet et al. [J. Phys. Chem. C 118 (38), 22079 (2014)] has shown that this could explain the emergence of a film-height-dependent surface tension close to the wall, with implications for the Frumkin–Derjaguin theory.

JOURNAL ARTICLE

Ravipati S, Aymard B, Kalliadasis S, Galindo Aet al., 2018, On the equilibrium contact angle of sessile liquid drops from molecular dynamics simulations, JOURNAL OF CHEMICAL PHYSICS, Vol: 148, ISSN: 0021-9606

JOURNAL ARTICLE

Yatsyshin P, Duran-Olivencia MA, Kalliadasis S, 2018, Microscopic aspects of wetting using classical density-functional theory., Journal of Physics: Condensed Matter, Vol: 30, ISSN: 0953-8984

Wetting is a rather efficient mechanism for nucleation of a phase (typically liquid) on the interface
 between two other phases (typically solid and gas). In many experimentally
 accessible cases of wetting, the interplay between the substrate structure,
 and the fluid-fluid and fluid-substrate intermolecular interactions brings
 about an entire ``zoo" of possible fluid configurations, such as liquid
 films with a thickness of a few nanometers, liquid nanodrops and liquid
 bridges. These fluid configurations are often associated with phase
 transitions occurring at the solid-gas interface and at lengths of just
 several molecular diameters away from the substrate. In this special issue
 article, we demonstrate how a fully microscopic classical
 density-functional framework can be applied to the efficient, rational and
 systematic exploration of the rich phase space of wetting phenomena. We
 consider a number of model prototype systems such as wetting on a planar
 wall, a chemically patterned wall and a wedge. Through density-functional
 computations we demonstrate that for these simply structured substrates the
 behaviour of the solid-gas interface is already highly complex and
 non-trivial.

JOURNAL ARTICLE

Yatsyshin P, Kalliadasis S, 2018, Classical density-functional theory studies of fluid adsorption on nanopatterned planar surfaces, Pages: 171-185, ISSN: 2194-1009

© Springer International Publishing AG, part of Springer Nature 2018. This contribution is based on our talk at the BIRS Workshop on “Coupled Mathematical Models for Physical and Biological Nanoscale Systems and Their Applications”. Our aim here is to summarize and bring together recent advances in wetting of nanostructured surfaces, using classical density-functional theory (DFT). Classical DFT is an ab initio theoretical-computational framework with a firm foundation in statistical physics allowing us to systematically account for the fluid spatial inhomogeneity, as well as for the non-localities of intermolecular fluid-fluid and fluid-substrate interactions. The cornerstone of classical DFT, is to express the grand free energy of the system as a functional of its one-body density, thus generating a hierarchy of N-body correlation functions. Unconstrained minimization of a properly approximated free-energy functional with respect to the one-body density then yields the basic DFT equation. And since most macroscopic quantities of interest can often be cast as averages over a one-body distribution, this equation provides a very useful and accessible computational tool. Indeed, there has been a rapid growth of classical DFT applications across a broad variety of fields, including phase transitions in solutions of macromolecules, interfacial phenomena, and even nucleation. Here we attempt to give a taste of what simple equilibrium DFT models look like, and what they can and cannot capture, as far as wetting on chemically heterogeneous substrates is concerned. We review recent progress in the understanding of planar prewetting and interface unbending on such substrates and compute substrate-fluid interfaces and wetting isotherms.

CONFERENCE PAPER

Yatsyshin P, Parry AO, Rascon C, Kalliadasis Set al., 2018, Wetting of a plane with a narrow solvophobic stripe, MOLECULAR PHYSICS, Vol: 116, Pages: 1990-1997, ISSN: 0026-8976

JOURNAL ARTICLE

Zheng Z, Fontelos MA, Shin S, Dallaston MC, Tseluiko D, Kalliadasis S, Stone HAet al., 2018, Healing capillary films., Journal of Fluid Mechanics, Vol: 838, Pages: 404-434, ISSN: 0022-1120

Consider the dynamics of a healing film driven by surface tension, that is, the inward spreading process of a liquid film to fill a hole. The film is modelled using the lubrication (or thin-film) approximation, which results in a fourth-order nonlinear partial differential equation. We obtain a self-similar solution describing the early-time relaxation of an initial step-function condition and a family of self-similar solutions governing the finite-time healing. The similarity exponent of this family of solutionsis not determined purely from scaling arguments; instead, the scaling exponent is a function of the finite thickness of the prewetting film, which we determine numerically. Thus, the solutions that govern the finite-time healing are self-similar solutions of the second kind. Laboratory experiments and time-dependent computations of the partialdifferential equation are also performed. We compare the self-similar profiles and exponents, obtained by matching the estimated prewetting film thickness, with both measurements in experiments and time-dependent computations near the healing time, and we observe good agreement in each case.

JOURNAL ARTICLE

Charogiannis, Denner, van Wachem, kalliadasis, Markideset al., 2017, Detailed Hydrodynamic Characterization of Harmonically Excited Falling-Film Flows: A Combined Experimental and Computational Study, Physical Review Fluids, Vol: 2, Pages: 014002-014002, ISSN: 2469-990X

We present results from the simultaneous application of planar laser-induced uorescence (PLIF)and particle image/tracking velocimetry, complemented by direct numerical simulations, aimed atthe detailed hydrodynamic characterization of harmonically excited liquid- lm ows falling underthe action of gravity. The experimental campaign comprises four di erent aqueous-glycerol solutionscorresponding to four Kapitza numbers (Ka= 14, 85, 350, 1800), spanning the Reynolds numberrangeRe= 2:3

JOURNAL ARTICLE

Charogiannis A, Denner F, van Wachem BGM, Kalliadasis S, Markides CNet al., 2017, Statistical characteristics of falling-film flows: A synergistic approach at the crossroads of direct numerical simulations and experiments, PHYSICAL REVIEW FLUIDS, Vol: 2, ISSN: 2469-990X

JOURNAL ARTICLE

Dallaston MC, Tseluiko D, Zheng Z, Fontelos MA, Kalliadasis Set al., 2017, Self-similar finite-time singularity formation in degenerate parabolic equations arising in thin-film flows, NONLINEARITY, Vol: 30, Pages: 2647-2666, ISSN: 0951-7715

JOURNAL ARTICLE

Duran-Olivencia MA, Yatsyshin P, Goddard BD, Kalliadasis Set al., 2017, General framework for fluctuating dynamic density functional theory, NEW JOURNAL OF PHYSICS, Vol: 19, ISSN: 1367-2630

JOURNAL ARTICLE

Gomes SN, Kalliadasis S, Papageorgiou DT, Pavliotis GA, Pradas Met al., 2017, Controlling roughening processes in the stochastic Kuramoto-Sivashinsky equation, PHYSICA D-NONLINEAR PHENOMENA, Vol: 348, Pages: 33-43, ISSN: 0167-2789

JOURNAL ARTICLE

Gotoda H, Pradas M, Kalliadasis S, 2017, Chaotic versus stochastic behavior in active-dissipative nonlinear systems, PHYSICAL REVIEW FLUIDS, Vol: 2, ISSN: 2469-990X

JOURNAL ARTICLE

Morciano M, Fasano M, Nold A, Braga C, Yatsyshin P, Sibley DN, Goddard BD, Chiavazzo E, Asinari P, Kalliadasis Set al., 2017, Nonequilibrium molecular dynamics simulations of nanoconfined fluids at solid-liquid interfaces, JOURNAL OF CHEMICAL PHYSICS, Vol: 146, ISSN: 0021-9606

JOURNAL ARTICLE

Nold A, Goddard BD, Yatsyshin P, Savva N, Kalliadasis Set al., 2017, Pseudospectral methods for density functional theory in bounded and unbounded domains, JOURNAL OF COMPUTATIONAL PHYSICS, Vol: 334, Pages: 639-664, ISSN: 0021-9991

JOURNAL ARTICLE

Schmuck M, Kalliadasis S, 2017, RATE OF CONVERGENCE OF GENERAL PHASE FIELD EQUATIONS IN STRONGLY HETEROGENEOUS MEDIA TOWARD THEIR HOMOGENIZED LIMIT, SIAM JOURNAL ON APPLIED MATHEMATICS, Vol: 77, Pages: 1471-1492, ISSN: 0036-1399

JOURNAL ARTICLE

Yatsyshin P, Parry AO, Rascon C, Kalliadasis Set al., 2017, Classical density functional study of wetting transitions on nanopatterned surfaces, JOURNAL OF PHYSICS-CONDENSED MATTER, Vol: 29, ISSN: 0953-8984

JOURNAL ARTICLE

Charogiannis A, Pradas M, Denner F, van Wachem BGM, Kalliadasis S, Markides CNet al., 2016, Hydrodynamic characteristics of harmonically excited thin-film flows: Experiments and computations, 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics

CONFERENCE PAPER

Dallaston MC, Tseluiko D, Kalliadasis S, 2016, Dynamics of a thin film flowing down a heated wall with finite thermal diffusivity, PHYSICAL REVIEW FLUIDS, Vol: 1, ISSN: 2469-990X

JOURNAL ARTICLE

Denner F, Pradas M, Charogiannis A, Markides CN, van Wachem BGM, Kalliadasis Set al., 2016, Self-similarity of solitary waves on inertia-dominated falling liquid films, PHYSICAL REVIEW E, Vol: 93, ISSN: 2470-0045

JOURNAL ARTICLE

Duncan AB, Kalliadasis S, Pavliotis GA, Pradas Met al., 2016, Noise-induced transitions in rugged energy landscapes, PHYSICAL REVIEW E, Vol: 94, ISSN: 2470-0045

JOURNAL ARTICLE

Duran-Olivencia MA, Goddard BD, Kalliadasis S, 2016, Dynamical Density Functional Theory for Orientable Colloids Including Inertia and Hydrodynamic Interactions, JOURNAL OF STATISTICAL PHYSICS, Vol: 164, Pages: 785-809, ISSN: 0022-4715

JOURNAL ARTICLE

Goddard BD, Nold A, Kalliadasis S, 2016, Dynamical density functional theory with hydrodynamic interactions in confined geometries, JOURNAL OF CHEMICAL PHYSICS, Vol: 145, ISSN: 0021-9606

JOURNAL ARTICLE

Pradas M, Savva N, Benziger JB, Kevrekidis IG, Kalliadasis Set al., 2016, Dynamics of Fattening and Thinning 2D Sessile Droplets, LANGMUIR, Vol: 32, Pages: 4736-4745, ISSN: 0743-7463

JOURNAL ARTICLE

Schmuck M, Kalliadasis S, 2016, General framework for adsorption processes on dynamic interfaces, JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL, Vol: 49, ISSN: 1751-8113

JOURNAL ARTICLE

Yatsyshin P, Kalliadasis S, 2016, Mean-field phenomenology of wetting in nanogrooves, MOLECULAR PHYSICS, Vol: 114, Pages: 2688-2699, ISSN: 0026-8976

JOURNAL ARTICLE

Yatsyshin P, Parry AO, Kalliadasis S, 2016, Complete prewetting, JOURNAL OF PHYSICS-CONDENSED MATTER, Vol: 28, ISSN: 0953-8984

JOURNAL ARTICLE

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