Buoyancy-driven convective motion in a thermal diffusion cloud chamber using a water/helium mixture

Utheza, Françoise; Senechal, D.; Garnier, F.

doi:10.1016/j.ijthermalsci.2008.09.005

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2011

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“…It is shown that the mathematical model allows to properly predict the evolutions of the gas mixture properties from an initial state up to a well defined steady-state. However, these computations clearly display that too sharp increases or decreases in the wall temperature may lead to local supersaturations which are admissible provided they do not exceed the critical supersaturation corresponding to the local temperature within the cavity [21][22][23]. Table I.…”

Section: Resultsmentioning

confidence: 99%

Natural convection and wall condensation or evaporation in humid air-filled cavities subjected to wall temperature variations

Sun¹,

Lauriat²,

Nicolás³

2011

International Journal of Thermal Sciences

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Heat and mass transfer by natural convection coupled to wall surface condensation or evaporation in a two-dimensional cavity subjected to uniform, but time-dependent wall temperatures is investigated numerically. At initial state, the cavity is filled with quiescent humid air at uniform temperature and density. By decreasing the wall temperature, condensation occurs at the four wall surfaces until an equilibrium thermodynamic state is reached. The walls are then Ra m solutal Rayleigh number,Sh local Sherwood number (Eq. 36)Greeks β m solutal coefficient of volumetric expansion

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Section: Resultsmentioning

confidence: 99%