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International Symposium on Transient Convective Heat Transfer
August, 19-23, 1996, Çesme, Turkey

DOI: 10.1615/ICHMT.1996.TransientConvHeatTransf


ISBN Print: 978-1-56700-084-9

STUDY ON THE EFFECTS OF FREE CONVECTION AND ELEVATED PRESSURE ON TRANSIENT DROPLET EVAPORATION

DOI: 10.1615/ICHMT.1996.TransientConvHeatTransf.360
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ABSTRACT

In this paper, we present a model for pure fuel droplet evaporation at high pressure with natural convection. The principle of the method uses the film theory : heat and mass transfer between droplet surface and ambiant gas takes place in a thin film around the droplet. In addition, in order to take natural convection into account, we first of all write and resolve local equations for a limited gas phase around a porous sphere. With this calculation, we able to estimate the corresponding mean Nusselt and Sherwood numbers in terms of mass and thermal Grashof numbers and thus determine the thickness of the gas film. In the first section of this paper, we present the numerical method and the correlation obtained for taking natural convection into account. In the last section of this paper, we present a comparison between our numerical results and experimental and numerical results in the appropriate literature.

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