Concept

Rayleigh number

Related publications (39)

Interface structure and flux laws in a natural double-diffusive layering

The diffusive regime of double-diffusive convection generates staircases consisting of thin high-gradient interfaces sandwiched between convectively mixed layers. Simultaneous microstructure measurements of both temperature and conductivity from the stairc ...

Amer Geophysical Union2013

Stabilized reduced basis method for parametrized advection-diffusion PDEs

Paolo Pacciarini

The aim of this master thesis is to study and develop a stabilized reduced basis method suitable for the approximation of the solution of parametrized advection-diffusion PDEs with high Péclet number, that is, roughly, the ratio between the advection coeff ...

2012

Stability of a Double-Diffusive Interface in the Diffusive Convection Regime

Alfred Johny Wüest

In this paper, the authors explore the conditions under which a double-diffusive interface may become unstable. Focus is placed on the case of a cold, freshwater layer above a warm, salty layer [i.e., the diffusive convection (DC) regime]. The "diffusive i ...

Amer Meteorological Soc2012

Heat transfer enhancement in a straight channel via a rotationally oscillating adiabatic cylinder

Mohsen Cheraghi

Heat convection from the uniformly heated walls of a straight channel in presence of a rotationally oscillating cylinder (ROC) is simulated at Re = 100. Heat transfer enhancement due to vortex shedding from the ROC is investigated. Systematic studies are p ...

Elsevier2012

Experimental investigation into segregating granular flows down chutes

Christophe Ancey, Nicolas Andreini, Gaël Epely Chauvin, Sébastien Wiederseiner, Gaudenz Moser

We experimentally investigated how a binary granular mixture made up of spherical glass beads size ratio of 2 behaved when flowing down a chute. Initially, the mixture was normally graded, with all the small particles on top of the coarse grains. Segregati ...

2011

Numerical investigation of particle-laden thermally driven turbulent flows in enclosure

Riccardo Puragliesi

Nowadays, the global increase of energy demand and the necessity to satisfy high safety standards have led engineers and scientists to focus their efforts in order to understand and describe fundamental phenomena that are crucial for a correct design of th ...

EPFL2010

Critical heat flux in multi-microchannel copper elements with low pressure refrigerants

John Richard Thome, Jung Eung Park

New saturated critical heat flux (CHF) data have been obtained experimentally in two different multi-microchannel heat sinks made in copper with three low pressure refrigerants (R134a, R236fa, R245fa). one of the test sections has 20 parallel rectangular c ...

Elsevier2010

New lives for old reverse osmosis (RO) membranes

The overall objective of the present work was to estimate by membrane autopsy the level of performances degradation of old reverse osmosis (RO) membranes/modules in order to envisage their reuse A mechanistic approach using the Spiegler-Kedem-Karchalsky mo ...

2010

Reduced Basis Methods and A Posteriori Error Estimators for Heat Transfer Problems

Simone Deparis, Gianluigi Rozza

This paper focuses on the parametric study of steady and unsteady forced and natural convection problems by the certified reduced basis method. These problems are characterized by an input-output relationship in which given an input parameter vector — mate ...

ASME2009

Reduced basis method for multi-parameter dependent steady Navier-Stokes equations: applications to natural convection in a cavity

Simone Deparis, Gianluigi Rozza

This work focuses on the approximation of parametric steady Navier-- Stokes equations by the reduced basis method. For a particular instance of the parameters under consideration, we are able to solve the underlying partial differential equations, compute ...

2009

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