An Experimental Assessment on the Effects of Forced, Free and Mixed Convection Regimes on the Water Evaporation Rate in Surface Gravity Waves

Document Type : Research Article

Author

Mechanical Engineering Department, University of Bojnord, Assistant Professor

Abstract

experimental measurements have been done over a wide range of wave parameters, water temperatures and air velocities in different convection regimes. The measurements were performed on a large heated wave flume equipped with a wind tunnel. The effects of forced, free and mixed convection regimes on the water evaporation rate in surface gravity waves have been investigated. The results show that wave motion on the water surface increases the rate of evaporation for all airflow regimes. In addition, results reveal the evaporation rate increases with air velocity but increasing of the wavy surface parameter, has different effects on the evaporation rate. For the free convection regime, the evaporation rate increases by increasing the wavy parameter. For forced and mixed convection regime at medium values of wave parameters, the leeward airflow structures, which form a barrier for the vertical transport of vapor, decrease evaporation rate. Results reveal that the effect of induced turbulence at the wavy interfacial surfaces on the water evaporation increment is more than the effect of interfacial area increment percentage. Results reveal that the effect of induced turbulence at the wavy interfacial surfaces on the water evaporation increment is more than the effect of interfacial area increment percentage.

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References

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Amirkabir Journal of Mechanical Engineering
Volume 52, Issue 2
May 2020
Pages 453-464

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