Revisiting D 2-law for the evaporation of dilute droplets

In a wide range of applications, the estimate of droplet evaporation time is based on the classical D 2-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 evapo...

Full description

Saved in:
Bibliographic Details
Published in:Physics of fluids (1994) 2021-05, Vol.33 (5)
Main Authors: Dalla Barba, F., Picano, F.
Format: Article
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In a wide range of applications, the estimate of droplet evaporation time is based on the classical D 2-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 D 2-law capable of accurately determining 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.
ISSN:1070-6631
1089-7666
DOI:10.1063/5.0051078