Numerical Simulation of Oil-Droplet Cleavage by Surfactant

Author:

He Xiaoyi1,Dembo Micah1

Affiliation:

1. Mail Stop K-710, Group T-10, Los Alamos National Laboratory, Los Alamos, NM 87545

Abstract

We present numerical computations of the deformation of an oil-droplet under the influence of a surface tension gradient generated by the surfactant released at the poles (the Greenspan experiment). We find this deformation to be very small under the pure surface tension gradient. To explain the large deformation of oil droplets observed in Greenspan’s experiments, we propose the existence of a phoretic force generated by the concentration gradient of the surfactant. We show that this hypothesis successfully explains the available experimental data and we propose some further tests.

Publisher

ASME International

Subject

Physiology (medical),Biomedical Engineering

Cited by 7 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Numerical methods for a fluid mixture model;International Journal for Numerical Methods in Fluids;2012-01-09

2. Simulation of multiphase flows with variable surface tension using the Lattice Boltzmann method;WIT Transactions on Engineering Sciences;2010-08-26

3. Surfactant-driven motion and splitting of droplets on a substrate;Journal of Engineering Mathematics;2004-11

4. Numerical analysis of interfacial two-dimensional Stokes flow with discontinuous viscosity and variable surface tension;International Journal for Numerical Methods in Fluids;2001

5. Lipolytic enzyme production in batch and fed-batch cultures ofOphiostoma piceae andFusarium oxysporum;Journal of Chemical Technology & Biotechnology;2000

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