Convection flow study within a horizontal fluid layer under the action of gas flow

Aleksei Kreta,D.V Zaitsev,O.A Kabov

doi:10.1051/matecconf/20168400017

Aleksei Kreta, D.V Zaitsev + Show 1 more

Open Access

https://doi.org/10.1051/matecconf/20168400017

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Abstract

Experimental investigation of convective processes within horizontal evaporating liquid layer under shear–stress of gas flow is presented. It is found the structures of the convection, which move in opposite direction relative to each other. First convective structure moves in reverse direction with the flow of gas, and the second convective structure moves towards the gas flow. Convection flow within the liquid layer is registered with help of PIV technique. Average evaporation flow rate of Ethanol liquid layer under Air gas flow is measured. Influence of the gas velocity, at a constant temperature of 20 °C, on the evaporation flow rate has been studied.

Highlights

The processes of convection, accompanied by evaporation at the interface, are actively studied experimentally [1,2,3,4], numerically [4,5,6] and theoretically in the present time [6,7,8]
Most often the liquid evaporates into air or more generally an inert gas, which implies a limitation of the evaporation rate by diffusion of vapor into the inert gas, [10-12]
It is evident that the structure of the convective flow within the liquid layer should significantly depend on the various parameters of experiment like the inert gas flow rate, the gas and liquid temperature and the size of the liquid layer

Summary

Introduction

The processes of convection, accompanied by evaporation at the interface, are actively studied experimentally [1,2,3,4], numerically [4,5,6] and theoretically in the present time [6,7,8] Scientific activity in this direction is determined by the experiments in the frame of the CIMEX project of the European Space Agency, [9]. The evaporation from the liquid surface induces a cooling of the gas-liquid interface It causes a temperature gradient between the heated bottom and the gas-liquid interface. It is evident that the structure of the convective flow within the liquid layer should significantly depend on the various parameters of experiment like the inert gas flow rate, the gas and liquid temperature and the size of the liquid layer

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