  In a wide range of applications, the estimate of droplet evaporation time is
based on the classical d2-law, which, assuming a fast mixing and fixed
environmental properties, states that the droplet surface decreases linearly
with time at a determined rate. However, in many cases the predicted
evaporation rate is overestimated. In this Letter, we propose a revision of the
d2-law capable to accurately determine droplet evaporation rate in dilute
conditions by a proper estimate of the asymptotic droplet properties. Besides a
discussion of the main assumptions, we tested the proposed model against data
from direct numerical simulations finding an excellent agreement for predicted
droplet evaporation time in dilute turbulent jet-sprays.
