References of "Lebon, Georgy"
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See detailBeyond the Fourier heat conduction law and the thermal no-slip boundary condition
Lebon, Georgy ULg; Jou, D.; Dauby, Pierre ULg

in Physics Letters A (2012), 376(45), 2842-2846

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See detailFrom ballistic to diffusive regimes in heat transport at nano-scales
Lebon, Georgy ULg; Grmela, Miroslav; Dubois, Charles

in Comptes Rendus de l'Académie des Sciences. Série II, Mécanique, Physique, Chimie, Sciences de l'Univers, Sciences de la Terre (2011), 339

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See detailAn extended thermodynamic model of transient heat conduction at sub-continuum scales
Lebon, Georgy ULg; Machrafi, Hatim ULg; Grmela, M. et al

in Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences (2011), 467

A thermodynamic description of transient heat conduction at small length and timescales is proposed. It is based on extended irreversible thermodynamics and the main feature of this formalism is to ... [more ▼]

A thermodynamic description of transient heat conduction at small length and timescales is proposed. It is based on extended irreversible thermodynamics and the main feature of this formalism is to elevate the heat flux vector to the status of independent variable at the same level as the classical variable, the temperature. The present model assumes the coexistence of two kinds of heat carriers: diffusive and ballistic phonons. The behaviour of the diffusive phonons is governed by a Cattaneo-type equation to take into account the high-frequency phenomena generally present at nanoscales. To include non-local effects that are dominant in nanostructures, it is assumed that the ballistic carriers are obeying a Guyer–Krumhansl relation. The model is applied to the problem of transient heat conduction through a thin nanofilm. The numerical results are compared with those provided by Fourier, Cattaneo and other recent models. [less ▲]

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See detailExtended Irreversible Thermodynamics
Jou, david; Casas-Vazquez, jose; Lebon, Georgy ULg

Book published by Springer (2010)

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See detailThermodynamics of suspensions of polymeric chains in dilute solutions
Palumbo, Annunziata; Valenti, Antonino; Lebon, Georgy ULg

in Journal of Non-Equilibrium Thermodynamics (2010), 35

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See detailVariational principles for thermal transport in nanosystems with heat slip flow
Jou, David; Lebon, Georgy ULg; Criado-Sancho, Manollo

in Physical Review. E : Statistical, Nonlinear, and Soft Matter Physics (2010), 82

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See detailUnderstanding Non-equilibrium Thermodynamics
Lebon, Georgy ULg; Jou, david; Casas-Vazquez, jose

Book (2008)

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See detailSecond sound and shock waves in rigid crystals: an extended thermodynamic analysis
Lebon, Georgy ULg; Dauby, Pierre ULg; Desaive, Thomas ULg et al

in Proceedings of CHT-08 ICHMT International Symposium on Advances in Computational Heat Transfer (2008)

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See detailAn Extended thermodynamic approach of suspensions
Lebon, Georgy ULg; Lhuillier, D.; Dauby, Pierre ULg et al

in 3rd International Meeting of IEEES (2007)

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See detailA unified extended thermodynamic description of diffusion, thermo-diffusion, suspensions, and porous media
Lebon, Georgy ULg; Desaive, Thomas ULg; Dauby, Pierre ULg

in Journal of Applied Mechanics-Transactions of the Asme (2006), 73(1), 16-20

It is shown that extended irreversible thermodynamics (EIT) provides a Unified description of a great variety of processes, including matter diffusion, thermo-diffusion, suspensions, and fluid flows in ... [more ▼]

It is shown that extended irreversible thermodynamics (EIT) provides a Unified description of a great variety of processes, including matter diffusion, thermo-diffusion, suspensions, and fluid flows in porous media. This is achieved by enlarging the set of classical variables, as mass, momentum and temperature by the corresponding fluxes of mass, momentum and heat. For simplicity, we consider only Newtonian fluids and restrict ourselves to a linear analysis: quadratic and higher order terms in the fluxes are neglected. In the case of diffusion in a binary mixture, the extra flux variable is the diffusion flux of one the constituents, say the solute. In thermo-diffusion, one adds the heat flux to the set of variables. The main result of the present approach is that the traditional equations of Fick, Fourier Soret, and Dufour are replaced by time-evolution equations for the matter and heat fluxes, such generalizations are useful in high-frequency processes. It is also shown that the analysis can be easily extended to the study of particle suspensions in fluids and to flows in porous media, when such systems can be viewed as binary mixtures with a solid and a fluid component. [less ▲]

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See detailConvection and interfacial mass exchange
Colinet, P.; Legros, Jean-Claude; Dauby, Pierre ULg et al

in ESA Special Publication (2005, October 01)

Mass-exchange through fluid interfaces is ubiquitous in many natural and industrial processes. Yet even basic phase-change processes such as evaporation of a pure liquid are not fully understood, in ... [more ▼]

Mass-exchange through fluid interfaces is ubiquitous in many natural and industrial processes. Yet even basic phase-change processes such as evaporation of a pure liquid are not fully understood, in particular when coupled with fluid motions in the vicinity of the phase-change interface, or with microscopic physical phenomena in the vicinity of a triple line (where the interface meets a solid). Nowadays, many industries recognise that this lack of fundamental knowledge is hindering the optimisation of existing processes. Their modelling tools are too dependent on empirical correlations with a limited - and often unknown - range of applicability. In addition to the intrinsic multiscale nature of the phenomena involved in typical industrial processes linked to interfacial mass exchange, their study is highly multi-disciplinary, involving tools and techniques belonging to physical chemistry, chemical engineering, fluid dynamics, non-linear physics, non-equilibrium thermodynamics, chemistry and statistical physics. From the experimental point of view, microgravity offers a unique environment to obtain valuable data on phase-change processes, greatly reducing the influence of body forces and allowing the detailed and accurate study of interfacial dynamics. In turn, such improved understanding leads to optimisation of industrial processes and devices involving phase-change, both for space and ground applications. [less ▲]

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See detailOn an Extended Irreversible Thermodynamic description of transient heat conduction in nano structures
Lebon, Georgy ULg; Dauby, Pierre ULg; Grmela, M.

in Proceedings of the 2d IEEES Conference (2005, July)

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See detailBallistic-diffusive heat conduction at nanoscale: GENERIC approach [rapid communication]
Grmela, M.; Lebon, Georgy ULg; Dauby, Pierre ULg et al

in Physics Letters A (2005), 339

Heat conduction in nanosize systems has to be studied in settings involving microscopic details that are not seen in the classical Fourier theory. G. Chen has suggested [Phys. Rev. Lett. 86 (2001) 2297] a ... [more ▼]

Heat conduction in nanosize systems has to be studied in settings involving microscopic details that are not seen in the classical Fourier theory. G. Chen has suggested [Phys. Rev. Lett. 86 (2001) 2297] a combination of the Cattaneo setting in which the velocity of the heat propagation is finite and the kinetic theory setting in which phonons are seen as heat carriers. In this Letter we show that if the Cattaneo and the kinetic theories are combined in a way that preserves the structure expressing their compatibility with thermodynamics (GENERIC structure) then both the Cattaneo and the kinetic equations become modified. The modified Cattaneo equations involve the term introduced by Chen and, in addition, new terms that are nonlinear in quantities that disappear at equilibrium. The kinetic equation is modified by new terms involving gradients of the heat flux and the local temperature. [less ▲]

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See detailThermo-diffusion revisited: A comparative approach between two recent thermodynamic formalisms
Lebon, Georgy ULg; Desaive, Thomas ULg; Colinet, P.

in Journal of Non-Equilibrium thermodynamics (2004), 29(4), 405-415

Extended irreversible thermodynamics and the general equation for the non-equilibrium reversible-irreversible coupling are two thermodynamic theories that have recently received much attention, not only ... [more ▼]

Extended irreversible thermodynamics and the general equation for the non-equilibrium reversible-irreversible coupling are two thermodynamic theories that have recently received much attention, not only from the fundamental but also from the practical point of view. The objective of the present work is to compare the respective merits of these two approaches by emphasising their similarities and differences. To avoid formal and tedious developments, we have applied both formalisms to a concrete problem, namely thermo-diffusion in a binary fluid mixture of nonviscous fluids. [less ▲]

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See detailAn unified extended thermodynamic description of diffusion, thermodiffusion, suspensions and porous media
Lebon, Georgy ULg; Desaive, Thomas ULg; Dauby, Pierre ULg

in Proceedings International Conference on thermal engineering theory and application, Beirut (Liban), 2004 (2004)

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See detailExtended Thermodynamic Description of Thermodiffusive Mass Transport
Lebon, Georgy ULg; Desaive, Thomas ULg; Dauby, Pierre ULg et al

in Proc. 6 th Int. Meeting on Thermodiffusion (IMT6), Varenna, July 2004 (2004)

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See detailA comparative analysis of non-fickean thermodiffusion by EIT and GENERIC
Lebon, Georgy ULg; Desaive, Thomas ULg; Colinet, P.

in 1st international exergy, energy and environment symposium (2003)

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See detailLa thermodiffusion revisitée
Lebon, Georgy ULg; Desaive, Thomas ULg; Dauby, Pierre ULg

in 6ème congrès de mécanique (2003)

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See detailThermal instability of a rotating saturated porous medium heated from below and submitted to rotation
Desaive, Thomas ULg; Hennenberg, M.; Lebon, Georgy ULg

in European Physical Journal B -- Condensed Matter (2002), 29(4), 641-647

In this work, we study the problem of onset of thermal convection in a rotating saturated porous medium heated from below. The effect of rotation is restricted to the Coriolis force, neglecting thus the ... [more ▼]

In this work, we study the problem of onset of thermal convection in a rotating saturated porous medium heated from below. The effect of rotation is restricted to the Coriolis force, neglecting thus the centrifugal effects, the porous medium is described by Brinkman's model. The linear eigenvalue problem is solved by means of a modified Galerkin method. The behavior of the critical temperature gradient is discussed in terms of various parameters of the system for both stationary and overstable convections. Finally a weakly nonlinear analysis is provided to derive amplitude equations and to study the onset of Kuppers-Lortz instability. [less ▲]

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