Jimenez, Noe; Tournat, Vincent; Romero García, Vicente; Sánchez Morcillo, Víctor José(Acoustical Society of America, 2018-07-09)
[EN] In solids, the constitutive relations between strain and stress lead in most cases to a dominant quadratic nonlinear response. However, there exist some solid materials that exhibit negative quadratic nonlinearity, ...
Zahonero López, Jorge(Universitat Politècnica de València, 2014-01-27)
El objetivo principal del proyecto consistirá en realizar un montaje
experimental apropiado para poder localizar burbujas en un líquido mediante la
aplicación de campos acústicos. El dispositivo propuesto es el adecuado ...
Archilla, J.F.R.; Kosevich ., Yuri; Jimenez, Noe; Sánchez Morcillo, Víctor José; García-Raffi, L. M.(Department of Physics and Astronomy of the National Academy of Sciences of Ukraine, 2013)
We consider a model made out of identical particles that repel each other with the Coulomb interaction. We study numerically and analytically the existence and properties of supersonic kinks, showing that they are very ...
Barguet, L.; Romero-García, V.; Jimenez, Noe; García-Raffi, L. M.; Sánchez Morcillo, Víctor José; Groby, J.-P.(Nature Publishing Group, 2021-01-12)
[EN] We present a 3-dimensional fully natural sonic crystal composed of spherical aggregates of fibers (called Aegagropilae) resulting from the decomposition of Posidonia Oceanica. The fiber network is first acoustically ...
Mehrem Issa Mohamed Mehrem, Ahmed(Universitat Politècnica de València, 2017-05-02)
The natural dynamics are not ideal or linear. To understand their complex behavior, we needs to study the nonlinear dynamics in more simple models. This thesis is consist of two main setups. Both setups are simplified ...
Mehrem, Ahmed; Jimenez, Noe; Salmerón-Contreras, L. J.; García-Andrés, Francesc Xavier; García-Raffi, L. M.; Picó Vila, Rubén; Sánchez Morcillo, Víctor José(American Physical Society, 2017)
[EN] The propagation of nonlinear waves in a lattice of repelling particles is studied theoretically and experimentally. A simple experimental setup is proposed, consisting of an array of coupled magnetic dipoles. By driving ...
Camarena Femenia, Francisco; Adrián Martínez, Silvia; Jimenez, Noe; Sánchez Morcillo, Víctor José(Acoustical Society of America, 2013-08)
The phenomenon of the displacement of the position along the axis of the pressure, intensity, and radiation force maxima of focused acoustic beams under increasing driving voltages (nonlinear focal shift) is studied for ...
Jimenez, Noe; Mehrem, Ahmed; Picó Vila, Rubén; García-Raffi, L. M.; Sánchez Morcillo, Víctor José(Elsevier Masson, 2016-05)
The propagation of intense acoustic waves in a one-dimensional phononic crystal is studied. The medium consists in a structured fluid, formed by a periodic array of fluid layers with alternating linear acoustic properties ...
Hamham, El Mokhtar; Jimenez, Noe; Picó Vila, Rubén; Sánchez Morcillo, Víctor José; García-Raffi, L. M.; Staliünas, Kestutis(American Physical Society, 2015-08-06)
We report the propagation of high-intensity sound beams in a sonic crystal, under self-collimation or reduced-divergence conditions. The medium is a fluid with elastic quadratic nonlinearity, where the dominating nonlinear ...
[EN] Including non-squared frequency dependent attenuation is essential to obtain accurate acoustic predictions in biological media
when wide-band signals and/or nonlinear effects are taken into account. Thus, a time ...
Castro Rodríguez, María del Carmen(Universitat Politècnica de València, 2015-04-29)
Han podido observarse tanto solitones kink como breathers ya que, a pesar de las no
uniformidades en la cadena, estas estructuras pueden ser muy robustas. Sin embargo, los
datos no se corresponden fielmente con lo esperado, ...
[EN] When finite amplitude ultrasound propagation is considered, changes in spatial features of focused ultrasound beams can be
observed. These nonlinear effects typically appear in thermoviscous fluids as focal displacements, ...
[EN] Most studies on wind variability have deepened into the stilling vs. reversal phenomena at global to regional scales, while
the long-term changes in local-scale winds such as sea-breezes (SB) represent a gap of knowledge ...
Torres Medina, Mª Desamparados(Universitat Politècnica de València, 2013-11-26)
En este proyecto se estudiará la propagación de un haz ultrasónico en un cristal de sonido (o cristal fonónico), tanto desde el punto de vista teórico como experimental. Se pretende con ello demostrar un resultado teórico ...
Jimenez, Noe; Sánchez Morcillo, Víctor José; Mehrem Issa Mohamed Mehrem, Ahmed; Hamham, El Mokhta; Picó Vila, Rubén; García-Raffi, L. M.(Elsevier, 2015)
[EN] The propagation of intense acoustic waves in a periodic medium (sonic crystal) is numerically studied. The medium consists in a structured fluid, formed by a periodic array of fluid layers with alternating linear ...
A theoretical and experimental study of the propagation of sound beams in and behind two-dimensional sonic crystals at frequencies close to the band edges is presented. Beam focusing is predicted and discussed. We evaluate, ...
García-Raffi, L. M.; Salmerón-Contreras, L. J.; Herrero-Durá, Iván; Picó Vila, Rubén; Redondo, Javier; Sánchez Morcillo, Víctor José; Cebrecos, Alejandro; Jimenez, Noe; Romero García, Vicente; Staliunas, K.(Universidade do Porto, 2016-06-15)
[EN] From the acoustical point of view one of the most extreme events is the lift-off of a rocket. In such events, an enormous amount of energy is liberated in the form of acoustic waves that are reflected in the launch ...
Salmerón Contreras, Luis José(Universitat Politècnica de València, 2016-01-08)
[EN] In the last decades, the control of the propagation of light, elastic and acoustic waves through periodic media has aroused great interest. These are known as photonic, phononic or sound crystals, respectively. These ...
Mehrem, Ahmed; Sánchez Morcillo, Víctor José; Jimenez, Noe; Salmerón Contreras, Luis José; García-Andrés, Francesc Xavier; Picó Vila, Rubén; García-Raffi, L. M.(Universidade do Porto, 2016-06-15)
[EN] In this work, we studied numerically, analytically and experimentally the nonlinear dynamics for a chain of magnates. Propagation the second harmonic depends on the medium parameters and the excitation signal (amplitude ...
The propagation of nonlinear compressional waves in a one-dimensional granular chain driven at one end by a harmonic excitation is studied. The chain is described by a Fermi-Pasta-Ulam (FPU) lattice model with quadratic ...