Exploració per tema "Instabilities"

Ara es mostren els items 1-10 de 10

    • 123-321 models of classical novae 

      José Pont, Jordi; Shore, Steven N.; Casanova Bustamante, Jordi (EDP Sciences, 2020-01-28)
      Article
      Accés obert
      Realitzat a/amb:   Università di Pisa
      Context. High-resolution spectroscopy has revealed large concentrations of CNO and sometimes other intermediate-mass elements (e.g., Ne, Na, Mg, or Al, for ONe novae) in the shells ejected during nova outbursts, suggesting ...

    • A pseudo-DNS method for the simulation of incompressible fluid flows with instabilities at different scale 

      Idelsohn Barg, Sergio Rodolfo; Nigro, Norberto; Larreteguy, Axel; Gimenez, Juan Marcelo; Ryzhakov, Pavel (Springer, 2020-01)
      Article
      Accés obert
      In this work, a new model for the analysis of incompressible fluid flows with massive instabilities at different scales is presented. It relies on resolving all the instabilities at all scales without any additional model, ...

    • Ferrofluidic Couette flow in time-varying magnetic field 

      Altmeyer, Sebastian Andreas (2022-06-15)
      Article
      Accés obert
      Despite time-dependent boundary conditions being ubiquitous in natural and industrial flows, to date the influence of such temporal modulations (e.g. with driving frequency O_H) has been given minor attention. The present ...

    • Ferrofluidic wavy Taylor vortices under alternating magnetic field 

      Altmeyer, Sebastian Andreas (2023)
      Comunicació de congrés
      Accés obert
      Many natural and industrial flows are subject to time-dependent boundary conditions and temporal modulations (e.g. driving frequency), which significantly modify the dynamics compared with their static ounterparts. The ...

    • Natural convection in a horizontal cylinder with axial rotation 

      Sánchez Casals, Odalys de la Caridad; Mercader Calvo, María Isabel; Batiste Boleda, Oriol; Alonso Maleta, María Aránzazu (AMER PHYSICAL SOC, 2016-06-23)
      Article
      Accés obert
      We study the problem of thermal convection in a laterally heated horizontal cylinder rotating about its axis. A cylinder of aspect ratio Gamma = H/2R = 2 containing a small Prandtl number fluid (sigma = 0.01) representative ...

    • Richtmyer-meshkov and rayleigh-taylor fractal mixing 

      Redondo Apraiz, José Manuel; Vila Esteve, Maria Teresa; Tellez Alvarez, Jackson David; Lopez Gonzalez-Nieto, Pilar; Sánchez, Miguel Ángel (Institute of Thermomechanics, Academy of Sciences of the Czech Republic, 2016-02-10)
      Article
      Accés obert
      Turbulence affects molecular mixing in a large variety of physical processes both in the environment, in astrophysics and in industrial situations. In some events it is interesting to enhance the transport of mass, heat, ...

    • SPHYNX: an accurate density-based SPH method for astrophysical applications 

      Cabezon Gomez, Ruben Martin; García Senz, Domingo; Figueira, Joana (EDP Sciences, 2017-10)
      Article
      Accés obert
      Aims. Hydrodynamical instabilities and shocks are ubiquitous in astrophysical scenarios. Therefore, an accurate numerical simulation of these phenomena is mandatory to correctly model and understand many astrophysical ...

    • Stabilization of flat-mirror vertical-external-cavity surface-emitting lasers by spatiotemporal modulation of the pump profile 

      Ahmed Waseem, Waqas Waseem; Kumar, Shubham; Herrero Simon, Ramon; Botey Cumella, Muriel; Radziunas, Mindaugas; Staliunas, Kestutis (2015-10-20)
      Article
      Accés obert
      We propose and demonstrate theoretically that vertical-external-cavity surface-emitting lasers (VECSELs) with external flat mirrors can be stabilized by applying a periodic spatiotemporal modulation of the pump current. ...

    • Stabilization of spatiotemporal solitons in Kerr media by dispersive coupling 

      Kartashov, Yaroslav V.; Malomed, Boris A.; Konotop, Vladimir V; Lobanov, Valery E.; Torner Sabata, Lluís (2015-03-15)
      Article
      Accés restringit per política de l'editorial
      We introduce a mechanism to stabilize spatiotemporal solitons in Kerr nonlinear media, based on the dispersion of linear coupling between the field components forming the soliton states. Specifically, we consider solitons ...

    • Testing the concept of integral approach to derivatives within the smoothed particle hydrodynamics technique in astrophysical scenarios 

      Cabezón Gómez, Rubén Martín; García Senz, Domingo; Escartín Vigo, José Antonio (2012)
      Article
      Accés obert
      Context. The smoothed particle hydrodynamics (SPH) technique is a well-known numerical method that has been applied to simulating the evolution of a wide variety of systems. Modern astrophysical applications of the method ...