Publikacje

Abstract:

This article discusses the evaluation of three methods of static contact angle measurements of deionized water and TiO2 8
nanofluid droplets with three concentrations (0.5%, 1% and 5%) that evaporate on the substrate of three different temperatures. To 9
compare the discussed approximation methods, the differences between the results of the mean contact angles were identified; the 10
highest standard deviation was recorded for the Young-Laplace and Circle methods, such as for the nanofluid TiO2- DI with 1% at 11
50oC it is 3.21o, while the lowest value was obtained for TiO2-DI with 5% at Tenv, SD=0.04o by comparing the contact angle results 12
using the Ellipse and Circle methods. Research shows that circular shape approximation is not to be excluded for contact angle 13
determination in the angular range of 0-75o.

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Evaluation of three methods of static contact angle measurements for TiO2 nanofluid droplets during evaporation