Listar por autoría "ffcd7329-5f4e-483a-80b7-1ece2d8f0d75"
Mostrando ítems 1-13 de 13
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Dissipative Finite-Element Formulation Applied to Piezoelectric Materials With the Debye Memory
Palma Guerrero, Roberto; Pérez Aparicio, J. L.; Taylor, Robert L. IEEE (2018-04)This work presents a finite-element study of the Debye memory in piezoelectric devices. The memory dependence is due to the spontaneous polarization of the electric dipoles, and it can be understood as a transient ... -
Elasto-thermoelectric beam formulation for modeling thermoelectric devices
Palma Guerrero, Roberto; Moliner, Emma; Pérez Aparicio, J. L. Elsevier (2017-07)The present paper provides a dynamic, non-linear and fully coupled Finite Element (FE) formulation based on the Timoshenko beam theory to study elasto-thermoelectric responses in thermoelectric devices. The two main ... -
Elasto-thermoelectric non-linear, fully coupled, and dynamic finite element analysis of pulsed thermoelectrics
Pérez Aparicio, J. L.; Palma Guerrero, Roberto; Moreno Navarro, P. Elsevier (2016-08)This paper presents a numerical study on the influence of pulsed electric signals applied to the overcooling of thermoelectric devices. To this end, an experimental setup taken from the literature and a commercial cell are ... -
Extended Poroelasticity: An Analytical Solution and Its Application to p-Wave Propagation in Cervical Tissues
Palma Guerrero, Roberto; Callejas, Antonio M. Hindawi Publishing Corporation (2018)Tis work presents a semianalytical solution based on Laplace transform to study the behaviour of poroelastic materials in the context of the Extended Nonequilibrium Termodynamics. In this framework, the fuid phase ... -
Finite element formulation to study thermal stresses in nanoencapsulated phase change materials for energy storage
Forner Escrig, Josep; Palma Guerrero, Roberto; Mondragon, Rosa Taylor & Francis (2020-03-09)Nanoencapsulated phase change materials (nePCMs) – which are composed of a core with a phase change material and of a shell that envelopes the core – are currently under research for heat storage applications. Mechanically, ... -
Mechanical reliability analysis of nanoencapsulated phase change materials combining Monte Carlo technique and the finite element method
Forner Escrig, Josep; Mondragon, Rosa; Hernandez, Leonor; Palma Guerrero, Roberto Elsevier (2021-07)Nanoencapsulated phase change materials (nePCMs) are one of the technologies currently under research for energy storage purposes. These nePCMs are composed of a phase change core surrounded by a shell which confines the ... -
Multiphysics and Thermodynamic Formulations for Equilibrium and Non-equilibrium Interactions: Non-linear Finite Elements Applied to Multi-coupled Active Materials
Pérez Aparicio, J. L.; Palma Guerrero, Roberto; Taylor, Robert L. Springer (2015-10)Combining several theories this paper presents a general multiphysics framework applied to the study of coupled and active materials, considering mechanical, electric, magnetic and thermal fields. The framework is based ... -
Near-intrinsic energy resolution for 30–662 keV gamma rays in a high pressure xenon electroluminescent TPC
Álvarez, V.; Borges, F. I. G. M.; Cárcel, S.; Castel, J.; Cebrián, S.; Cervera, A.; Conde, C. A. N.; Dafni, T.; Dias, T. H. V. T.; Díaz, J.; Egorov, M.; Esteve, R.; Evtoukhovitch, P.; Fernandes, L. M. P.; Ferrario, P.; Ferreira, A. L.; Freitas, E. D. C.; Gehman, V. M.; Gil, A.; Goldschmidt, A.; Gómez, H.; Gómez-Cadenas, J. J.; González-Díaz, D.; Gutiérrez, R. M.; Hauptman, J.; Hernando Morata, J. A.; Herrera, D. C.; Iguaz, F. J.; Irastorza, I. G.; Jinete, M. A.; Labarga, L.; Liubarsky, I.; Lopes, J. A. M.; Lorca, D.; Losada, M.; Luzón, G.; Marí, A.; Martín-Albo, J.; Martínez, A.; Miller, T.; Moiseenko, A.; Monrabal, F.; Monteiro, C. M. B.; Mora, F. J.; Moutinho, L. M.; Muñoz Vidal, J.; Natal da Luz, H.; Navarro, G.; Nebot-Guinot, M.; Nygren, D.; Oliveira, C. A. B.; Palma Guerrero, Roberto; Pérez, J.; Pérez Aparicio, J. L.; Renner, J.; Ripoll, L.; Rodríguez, A.; Rodríguez, J.; Santos, F. P.; Dos Santos, J. F. M.; Seguí, L.; Serra, L.; Shuman, D.; Simón, A.; Sofka, C.; Sorel, M.; Toledo, J. F.; Tomás, A.; Torrent, J.; Tsamalaidze, Z.; Vázquez, D.; Veloso, J. F. C. A.; Villar, J. A.; Webb, R. C.; White, J. T.; Yahlali, N. Elsevier (2013)We present the design, data and results from the NEXT prototype for Double Beta and Dark Matter (NEXT-DBDM) detector, a high-pressure gaseous natural xenon electroluminescent time projection chamber (TPC) that was built ... -
Non-linear finite element modelling of light-to-heat energy conversion applied to solar nanofluids
Forner Escrig, Josep; Mondragon, Rosa; Hernandez, Leonor; Palma Guerrero, Roberto Elsevier (2020-07-19)Nanoparticles (NPs) exhibit remarkable photothermal conversion efficiency under optical illumination. This light-induced heating on NPs is interesting in many different applications, such as solar radiation absorption in ... -
Numerical analysis of mechanical reliability of multi-coated phase change materials
Forner Escrig, Josep; Navarrete Argilés, Nuria; Palma Guerrero, Roberto; La Zara, Damiano; Valdesueiro, David; van Ommen, J. Ruud; Hernandez, Leonor; Mondragon, Rosa EDP Sciences (2021)Nanoencapsulated phase change materials (nePCMs) are nowadays under research for thermal energy storage purposes. NePCMs are composed of a phase change core surrounded by a shell that confines the core when molten. One of ... -
Numerical Modeling of the Mechanical Reliability of Multicoated Nanoencapsulated Phase-Change Materials with Improved Thermal Performance
Forner Escrig, Josep; Navarrete Argilés, Nuria; Palma Guerrero, Roberto; La Zara, Damiano; Goulas, Aristeidis; Valdesueiro, David; van Ommen, J. Ruud; Hernandez, Leonor; Mondragon, Rosa Wiley (2021-12-21)Nanoencapsulated phase-change materials (nePCMs) are investigated for enhancing thermal energy storage. However, the shell of these nanocapsules may fail due to stress developed during thermal processes, leading to melting ... -
Reliability-based dynamical design of a singular structure for high energy physics experiments
Palma Guerrero, Roberto; Torrent, J.; Pérez Aparicio, J. L.; Ripoll, L. Elsevier (2018-01)The present work presents a comprehensive design and dynamic calculation of singular metallic structures, part of the Neutrino Experiment NEXT. The experiment uses an electroluminescent TPC chamber, a high-pressure 136Xe ... -
Study of hysteretic thermoelectric behavior in photovoltaic materials using the finite element method, extended thermodynamics and inverse problems
Palma Guerrero, Roberto; Pérez Aparicio, J. L.; Bravo, R. Elsevier (2013)The main objective of the present work is to develop and prove a theoretical explanation based on the Extended Non-Equilibrium Thermodynamics (ENETs) for the hysteretical thermoelectric behavior observed in certain thin-film ...