Exploració per tema "Heat--Convection"
Ara es mostren els items 1-20 de 22
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Bifurcations to quasiperiodicity of the torsional solutions of convection in rotating fluid spheres: techniques and results
(2022-11-07)
Article
Accés obertThe linear stability of the periodic and axisymmetric solutions of the convection in rotating, internally heated, and self-gravitating fluid spheres is presented. The transition to quasiperiodic flows via Neimark–Sacker ... -
Computation of azimuthal waves and their stability in thermal convection in rotating spherical shells with application to the study of a double-Hopf bifurcation
(2013-03-22)
Article
Accés obertA methodology to compute azimuthal waves, appearing in thermal convection of a pure fluid contained in a rotating spherical shell, and to study their stability is presented. It is based on continuation, Newton-Krylov, and ... -
Convectons
(Springer, 2011-01-01)
Capítol de llibre
Accés obertA horizontal layer containing a miscible mixture of two fluids can generate dissipative solitons called convectons when heated from below. The physics of the system leading to this behavior is explained, and the properties ... -
Direct numerical simulation of laminar and turbulent Rayleigh-Bénard convection
(Universitat Politècnica de Catalunya / Universitat de Barcelona, 2013-06)
Projecte Final de Màster Oficial
Accés obertThe main aim of this work is understanding the phenomenon of B enard cells in laminar and turbulent regimes as an application of studying the air flow in the air gap and honey comb cells that installed in the flat plate ... -
Direct numerical simulation of the turbulent natural convection flow in an open cavity of aspect ratio 4
(Begell House, 2012)
Text en actes de congrés
Accés obertIn this paper, three-dimensional turbulent natural convection heat transfer in an open cavity with an isothermal wall facing the overture has been studied. The aspect ratio chosen for the cavity has been 4 to complement the ... -
DNS and LES of buoyancy-driven turbulence at high Rayleigh numbers: numerical methods and SGS models
(Springer, 2022)
Text en actes de congrés
Accés restringit per política de l'editorialBuoyancy-driven flows have always been an important subject of scientific studies with numerous applications in environment and technology. -
DNS and regularization modeling of a turbulent differentially heated cavity of aspect ratio 5
(2013-01-15)
Article
Accés obertThis work is devoted to the study of turbulent natural convection flows in differentially heated cavities. The adopted configuration corresponds to an airfilled (Pr = 0.7) cavity of aspect ratio 5 and Rayleigh number Ra ... -
Energy-consistent discretization of viscous dissipation with application to natural convection flows
(European Research Community on Flow, Turbulence, and Conbustion (ERCOFTAC), 2023)
Text en actes de congrés
Accés obertAn energy-consistent formulation of incompressible natural convection flows is proposed. In particular, a discretization of the viscous dissipation term is derived which is consistent with the local kinetic energy equation ... -
Localized pinning states in closed containers: homoclinic snaking without bistability
(2009-08)
Article
Accés obertBinary mixtures with a negative separation ratio are known to exhibit time-independent spatially localized convection when heated from below. Numerical continuation of such states in a closed two-dimensional container with ... -
Micro heat and mass transfer by bubble-trains from the gas discharging at nucleation sites
(2022-06-01)
Article
Accés restringit per política de l'editorialIn this study consideration is given to the possibility of heat and mass transfer from the characteristic columnar bubble-trains observed when a diluted gas precipitates upon contact with nucleation sites at the surface ... -
Mixing efficiency across Rayleigh-Taylor and Richtmeyer-Meshkov fronts
(World Scientific Publishing, 2015-06-03)
Article
Accés obertMixing generated by gravitational acceleration and the role of local turbulence measured through multifractal methods is examined in numerical experiments of Rayleigh-Taylor and Richtmyer-Meshkov driven front occurring ... -
Moisture statistics in free convective boundary layers growing into linearly stratified atmospheres
(2017-07-27)
Article
Accés obertWe use dimensional analysis and direct numerical simulations to characterize specific humidity statistics in the equilibrium (quasi-steady) entrainment regime of cloud-free convective boundary layers that grow into ... -
Multiphysics simulation of REMS hot-film anemometer under typical martian atmosphere conditions
(COMSOL, 2010)
Text en actes de congrés
Accés obertThe purpose of this paper is to describe numerical electro-thermal simulations of the REMS wind sensor unit [3] and the results obtained by using COMSOL multiphysics. This device is a hot-film anemometer for 2D wind ... -
Numerical simulations of thermal convection in rotating spherical shells under laboratory conditions
(2014-03-05)
Article
Accés restringit per política de l'editorialAn exhaustive study, based on numerical three-dimensional simulations, of the Boussinesq thermal convection of a fluid confined in a rotating spherical shell is presented. A moderately low Prandtl number fluid (ro = 0.1) ... -
On the onset of low Prandtl number convection in rotating spherical shells: non-slip boundary conditions
(2008-01-15)
Article
Accés obertAccurate numerical computations of the onset of thermal convection in wide rotating spherical shells are presented. Low-Prandtl-number (σ) fluids, and non-slip boundary conditions are considered. It is shown that at small ... -
On thermocapillary rings from radioactive particles suspended at the surface of liquids
(2019-07)
Article
Accés obertThermocapillary motion and its significance with regard the thermal behavior of heat sources and with particular reference to radioactive particles suspended in fluids is discussed. It shown that because the heat source, ... -
Periodic orbits in tall laterally heated rectangular cavities
(2017-02-02)
Article
Accés obertThis study elucidates the origin of the multiplicity of stable oscillatory flows detected by time integration in tall rectangular cavities heated from the side. By using continuation techniques for periodic orbits, it is ... -
Study of turbulent natural convection in a tall differentially heated cavity filled with either non-participating, participating grey and participating semigrey media
(Université de Poitiers, 2012)
Text en actes de congrés
Accés restringit per política de l'editorialTurbulent natural couvection in a tall differentially heated cavity of aspect ratio 5:1, filled with air under a Rayleigh number based on the height of 4.5.10(10), is studied numerically. Three different situations have ... -
Thermal binary mixture convection in inclined cylindrical containers
(2022)
Text en actes de congrés
Accés obertConvection in a fluid layer is affected by its orientation with respect to the gravitational field. In the present work, we investigate numerically pattern selection in a cylindrical cell heated from below and inclined ... -
Thermocapilarity and radiative heat flux oscillations
(2014)
Text en actes de congrés
Accés obertWe present a detailled experimental study of the thermocapillary motion of an aniline drop in an stably stratified fluid sytem driven by a laser beam. The thermocapillary motion of drops is the result of the temperature ...