New dimensionless equation for mass transfer at evaporation of open liquid surface in mixed or forced convection
Evelin Varju, Tibor Poós
Abstract
The process of evaporation can be grouped into 48 different cases depending on the conditions and properties of the gas and liquid. The publications found in the literature and the correlations specifying the evaporation rate can be classified into these cases. A new dimensionless equation was created that gives the value of the evaporation rate in the case of evaporation with steady-state gas and liquid conditions under mixed or forced convection. To create the equation, we used our own measurement results, as well as the measurement results found in the literature, which were published with appropriate data. During the comparison with equations found in the literature, the new dimensionless equation best approximated the measurement results with an average relative error of 12.4 %.