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
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171 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

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, theinward spreading process of a liquid film to fill a hole. The film is modelled usingthe lubrication (or thin-film) approximation, which results in a fourth-order nonlinearpartial differential equation. We obtain a self-similar solution describing the early-timerelaxation of an initial step-function condition and a family of self-similar solutionsgoverning the finite-time healing. The similarity exponent of this family of solutionsis not determined purely from scaling arguments; instead, the scaling exponent is afunction 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 thesecond kind. Laboratory experiments and time-dependent computations of the partialdifferential equation are also performed. We compare the self-similar profiles andexponents, obtained by matching the estimated prewetting film thickness, with bothmeasurements 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

DurĂ¡n-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

© 2017 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. We introduce a versatile bottom-up derivation of a formal theoretical framework to describe (passive) soft-matter systems out of equilibrium subject to fluctuations. We provide a unique connection between the constituent-particle dynamics of real systems and the time evolution equation of their measurable (coarse-grained) quantities, such as local density and velocity. The starting point is the full Hamiltonian description of a system of colloidal particles immersed in a fluid of identical bath particles. Then, we average out the bath via Zwanzig's projection-operator techniques and obtain the stochastic Langevin equations governing the colloidal-particle dynamics. Introducing the appropriate definition of the local number and momentum density fields yields a generalisation of the Dean-Kawasaki (DK) model, which resembles the stochastic Navier-Stokes description of a fluid. Nevertheless, the DK equation still contains all the microscopic information and, for that reason, does not represent the dynamical law of observable quantities. We address this controversial feature of the DK description by carrying out a nonequilibrium ensemble average. Adopting a natural decomposition into local-equilibrium and nonequilibrium contribution, where the former is related to a generalised version of the canonical distribution, we finally obtain the fluctuating-hydrodynamic equation governing the time-evolution of the mesoscopic density and momentum fields. Along the way, we outline the conne ction between the ad hoc energy functional introduced in previous DK derivations and the free-energy functional from classical density-functional theory. The resultant equation has the structure of a dynamical density-functional theory (DDFT) with an additional fluctuating force coming from the random interactions with the bath. We show that our fluctuating DDFT formalism corresponds to a particular version of the fluctuati

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

Charogiannis A, Markides CN, Denner F, Pradas M, Kalliadasis S, van Wachem BGMet al., 2015, A simultaneous application of PLIF-PIV-PTV for the detailed experimental study of the hydrodynamic characteristics of thin film flows, 11th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics (HEFAT2015)

CONFERENCE PAPER

Gomes SN, Pradas M, Kalliadasis S, Papageorgiou DT, Pavliotis GAet al., 2015, Controlling spatiotemporal chaos in active dissipative-dispersive nonlinear systems, Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, Vol: 92, ISSN: 1539-3755

We present an alternative methodology for the stabilization and control of infinite-dimensional dynamical systems exhibiting low-dimensional spatiotemporal chaos. We show that with an appropriate choice of time-dependent controls we are able to stabilize and/or control all stable or unstable solutions, including steady solutions, traveling waves (single and multipulse ones or bound states), and spatiotemporal chaos. We exemplify our methodology with the generalized Kuramoto-Sivashinsky equation, a paradigmatic model of spatiotemporal chaos, which is known to exhibit a rich spectrum of wave forms and wave transitions and a rich variety of spatiotemporal structures.

JOURNAL ARTICLE

Gotoda H, Pradas M, Kalliadasis S, 2015, Nonlinear Forecasting of the Generalized Kuramoto-Sivashinsky Equation, INTERNATIONAL JOURNAL OF BIFURCATION AND CHAOS, Vol: 25, ISSN: 0218-1274

JOURNAL ARTICLE

Kalliadasis S, Krumscheid S, Pavliotis GA, 2015, A new framework for extracting coarse-grained models from time series with multiscale structure, JOURNAL OF COMPUTATIONAL PHYSICS, Vol: 296, Pages: 314-328, ISSN: 0021-9991

JOURNAL ARTICLE

Krumscheid S, Pradas M, Pavliotis GA, Kalliadasis Set al., 2015, Data-driven coarse graining in action: Modeling and prediction of complex systems, PHYSICAL REVIEW E, Vol: 92, ISSN: 2470-0045

JOURNAL ARTICLE

Lin T-S, Pradas M, Kalliadasis S, Papageorgiou DT, Tseluiko Det al., 2015, COHERENT STRUCTURES IN NONLOCAL DISPERSIVE ACTIVE-DISSIPATIVE SYSTEMS, SIAM JOURNAL ON APPLIED MATHEMATICS, Vol: 75, Pages: 538-563, ISSN: 0036-1399

JOURNAL ARTICLE

Nold A, Sibley DN, Goddard BD, Kalliadasis Set al., 2015, Nanoscale Fluid Structure of Liquid-solid-vapour Contact Lines for a Wide Range of Contact Angles, MATHEMATICAL MODELLING OF NATURAL PHENOMENA, Vol: 10, Pages: 111-125, ISSN: 0973-5348

JOURNAL ARTICLE

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