The full text of this article
Evaluating the radius dependency of surface tension in nano-droplets by a diffuse-interface lattice Boltzmann
by Ehsan Amiri Rad
Progress in Computational Fluid Dynamics, An International Journal (PCFD), Vol. 17, No. 4, 2017
Abstract: In this paper, the dependency of surface tension and droplet radius is investigated by determination of pressure jump across the interface of a nano-scale droplet. For this goal, a gasliquid system consists of a nano-droplet and surrounding vapour is modelled using a diffuseinterface, free energy lattice Boltzmann method. The density and pressure distribution inside and outside the droplet can be obtained from LBM. Consequently, the surface tension is calculated by Laplace equation. Surface tension is found initially for carbon dioxide and then the results are extended for different materials and conditions. Interface thickness can be calculated as a function of material properties and conditions. The results show that, when the ratio of droplet radius to interface thickness (R* = R / h) is greater than 8.0, the surface tension is not a function of radius and it will be equal to the flat surface tension (constant regime). But if this ratio be less than 6.0, the surface tension decreases with radius in a linear pattern (linear regime). It is also shown that for a wide range of properties and conditions the quantitative behaviour of surface tension relative to droplet radius is the same.
Online publication date: Wed, 21-Jun-2017
is only available to individual subscribers or to users at subscribing institutions.
Go to Inderscience Online Journals to access the Full Text of this article.
Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.
Complimentary Subscribers, Editors or Members of the Editorial Board of the Progress in Computational Fluid Dynamics, An International Journal (PCFD):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable).
See our Orders page to subscribe.
If you still need assistance, please email firstname.lastname@example.org