نتایج جستجو برای: rayleighbenard convection

تعداد نتایج: 26494  

2011
Lijie Han Adam P. Showman

0019-1035/$ see front matter 2010 Elsevier Inc. A doi:10.1016/j.icarus.2010.11.034 ⇑ Corresponding author. E-mail addresses: [email protected] (L. Han), showman man). We present self-consistent, fully coupled two-dimensional (2D) numerical models of thermal evolution and tidal heating to investigate how convection interacts with tidal dissipation under the influence of non-Newtonian grain-size-sensit...

2008
Kate Goldstein Atila Novoselac

Convection at interior surfaces significantly affects the overall heat transfer in office buildings with large glazing areas. While a large number of these office buildings utilize ceiling slot diffusers at the glazed building perimeter, convection correlations specific to these diffusers have not yet been investigated. This paper describes convection correlations developed for ceiling slot dif...

1999
Ramesh Narayan Igor V. Igumenshchev Marek A. Abramowicz

We consider height-integrated equations of an advection-dominated accretion flow (ADAF), assuming that there is no mass outflow. We include convection through a mixing length formalism. We seek self-similar solutions in which the angular velocity and sound speed scale as R, where R is the radius, and consider two limiting prescriptions for the transport of angular momentum by convection. In one...

Journal: :Math. Comput. 2010
Zhen-Huan Teng

It is widely believed that if monotone difference schemes are applied to the linear convection equation with discontinuous initial data, then solutions of the monotone schemes are closer to solutions of their parabolic modified equations than that of the original convection equation. We will confirm the conjecture in this paper. It is well known that solutions of the monotone schemes and their ...

Journal: :Physical review letters 2005
Roberto Cerbino Stefano Mazzoni Alberto Vailati Marzio Giglio

We investigate the early stages of mass convection in a colloidal suspension at high solutal Rayleigh number Ras. From the time evolution of shadowgraph images and by assuming a diffusive growth of the boundary layers we obtain an indirect measurement of the concentration boundary layer thickness delta* at the onset of convection. We show that the dimensionless boundary layer thickness delta=de...

2005
Norman A. McFarlane Michael Lazare

The Canadian Centre for Climate Modelling and Analysis atmospheric general circulation model (AGCM4) is used to study the role of shallow convection in the hydrologic and energy cycles of the atmosphere. Sensitivity tests with AGCM4 show a marked effect of the parameterization of shallow convection in the model. In particular, including the parameterization of shallow convection produces consid...

2015
Sharon L. Sessions Michael J. Herman

We investigate the response of convection to idealized perturbations in the thermodynamic environment in simulations which parameterize the large-scale circulations using the weak temperature gradient (WTG) approximation. The perturbations include a combination of modifying the environmental moisture and atmospheric stability via imposing anomalies in reference moisture and temperature profiles...

2003
M. W. Moncrieff

This essay concerns precipitating convective cloud systems and convectively-driven mesoscale circulations (“mesoscale convection”) and their role in the large-scale structure of the atmosphere. Mesoscale convection is an important and ubiquitous process on scales of motion spanning a few kilometers to many hundreds of kilometers. It plays a role in the input of energy to the climate system thro...

2002
Jonathan Aurnou Steven Andreadis Lixin Zhu Peter Olson

Results of thermal convection experiments in a rotating uid with a geometry similar to the Earth's core tangent cylinder are presented. We nd four di erent regimes of convection. In order of increasing heat ow, these are: (1) subcritical (no convection), (2) helical plumes (hetons) around the tangent cylinder, (3) hetons throughout the tangent cylinder, and (4) fully three-dimensional convectio...

2013
Karsten Peters Christian Jakob Laura Davies Boualem Khouider Andrew J. Majda

5 The aim for a more accurate representation of tropical convection in global circulation models 6 is a long-standing issue. Here, we investigate the relationships between largeand convective 7 scales in observations and a Stochastic Multicloud Model (SMCM) to ultimately support 8 the design of a novel convection parametrization with stochastic elements. Observations of 9 tropical convection ob...

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