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14 p, 480.0 KB |
Tunable Heat-Flux Rectification in Graded Nanowires in Non-Linear Guyer-Krumhansl Regime
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Carlomagno, Isabella (University of Salerno) ;
Cimmelli, Vito Antonio (University of Basilicata) ;
Jou i Mirabent, David, 1953- (Universitat Autònoma de Barcelona. Departament de Física)
We study heat rectification in composition-graded nanowires, with nonlocal and nonlinear effects taken into account in a generalized Guyer-Krumhansl equation. Using a thermal conductivity dependent on composition and temperature, the heat equation is solved. [...]
2023 -  10.3390/nano13091442
Nanomaterials, Vol. 13, Issue 9 (May 2023) , art. 1442
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13 p, 1.4 MB |
Nonlinear heat transport in superlattices with mobile defects
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Jou i Mirabent, David, 1953- (Universitat Autònoma de Barcelona. Departament de Física) ;
Restuccia, Liliana (Department of Mathematical and Computer Sciences, Physical Sciences and Earth Sciences) ;
University of Messina
We consider heat conduction in a superlattice with mobile defects, which reduce the thermal conductivity of the material. If the defects may be dragged by the heat flux, and if they are stopped at the interfaces of the superlattice, it is seen that the effective thermal resistance of the layers will depend on the heat flux. [...]
2019 - 10.3390/e21121200
Entropy, Vol. 21 (2019) , p. 1-13
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45 p, 1.4 MB |
The bioelements, the elementome and the "biogeochemical niche"
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Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals) ;
Fernández-Martínez, Marcos (Universiteit Antwerpen. Departement Biologie) ;
Ciais, Philippe (Laboratoire des Sciences du Climat et de l'Environnement) ;
Jou i Mirabent, David, 1953- (Universitat Autònoma de Barcelona. Departament de Física) ;
Piao, Shilong (Sino-French Institute for Earth System Science) ;
Obersteiner, Michael (International Institute for Applied Systems Analysis (Àustria)) ;
Vicca, Sara (Universiteit Antwerpen. Departement Biologie) ;
Janssens, Ivan (University of Antwerp. Department of Biology) ;
Sardans i Galobart, Jordi (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Every living creature on Earth is made of atoms of the various bioelements that are harnessed in the construction of molecules, tissues, organisms, and communities, as we know them. Organisms need these bioelements in specific quantities and proportions to survive and grow. [...]
2019 - 10.1002/ecy.2652
Ecology, Vol. 100, Issue 5 (May 2019) , art. e02652
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18 p, 477.9 KB |
Thermodynamics and dynamics of flowing polymer solutions and blends
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Jou i Mirabent, David, 1953- (Universitat Autònoma de Barcelona. Departament de Física) ;
Casas Vázquez, José (Universitat Autònoma de Barcelona. Departament de Física) ;
Criado-Sancho, Manuel (Universidad Nacional de Educación a Distancia (Espanya). Departamento de Ciencias y Técnicas Físicoquímicas)
We review the basic ideas and main results of our analysis of shear-induced effects in polymer solutions and blends. The analysis combines thermodynamic and hydrodynamic descriptions. The flow contribution to the free energy of the solution is described in the framework of extended irreversible thermodynamics, which relates the viscoelastic constitutive equations to a non-equilibrium entropy that depends on the viscous pressure tensor. [...]
2003
Contributions to science, Vol. 2, Núm. 3 (2003) , p. 315-332
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10 p, 1.7 MB |
Continued-Fraction Expansion of Transport Coefficients with Fractional Calculus
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Garcia-Bernabé, Abel (Universitat Politècnica de Valencia. Departament de Termodinàmica Aplicada) ;
Hernández, Saul Iván (Universidad Nacional Autónoma de México. Facultad de Ciencias) ;
del Castillo, L. F. (Universidad Nacional Autónoma de México. Instituto de Investigaciones en Materiales) ;
Jou i Mirabent, David, 1953- (Universitat Autònoma de Barcelona. Departament de Física)
The main objective of this paper is to generalize the Extended Irreversible Thermodynamics in order to include the anomalous transport in systems in non-equilibrium conditions. Considering the generalized entropy, the corresponding flux and entropy production, and using the time fractional derivative, we have derived a space-time generalized telegrapher's equation with a fractional nested hierarchy which can be used in separate developments for the mass transport, for the heat conduction and for the flux of ions. [...]
2016 - 10.3390/math4040067
Mathematics, Vol. 4 Núm. 4 (2016) , p. 1-10
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52 p, 316.9 KB |
Entropy Principle and Recent Results in Non-Equilibrium Theories
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Cimmelli, Vito Antonio (University of Basilicata. Department of Mathematics and Computer Science) ;
Jou i Mirabent, David, 1953- (Universitat Autònoma de Barcelona. Departament de Física) ;
Ruggeri, Tommaso (Università di Bologna. Dipartamento di matemàtica) ;
Van, Peter (Institute for Particle and Nuclear Physics (Budapest, Hongria))
We present the state of the art on the modern mathematical methods of exploiting the entropy principle in thermomechanics of continuous media. A survey of recent results and conceptual discussions of this topic in some well-known non-equilibrium theories (Classical irreversible thermodynamics CIT, Rational thermodynamics RT, Thermodynamics of irreversible processes TIP, Extended irreversible hermodynamics EIT, Rational Extended thermodynamics RET) is also summarized.
2014 - 10.3390/e16031756
Entropy, Vol. 16 (2014) , p. 1756-1807
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16 p, 281.8 KB |
Three Duality Symmetries between Photons and Cosmic String Loops, and Macro and Micro Black Holes
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Jou i Mirabent, David, 1953- (Universitat Autònoma de Barcelona. Departament de Física) ;
Sciacca, Michele (Università di Palermo. Dipartimento di Scienze Agrarie e Forestali) ;
Mongiovì, Maria Stella (Istituto Nazionale di Alta Matematica)
We present a review of two thermal duality symmetries between two different kinds of systems: photons and cosmic string loops, and macro black holes and micro black holes, respectively. It also follows a third joint duality symmetry amongst them through thermal equilibrium and stability between macro black holes and photon gas, and micro black holes and string loop gas, respectively. [...]
2015 - 10.3390/sym7042134
Symmetry, Vol. 7 (2015) , p. 2134-2149
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