2d simulations of interfacial instabilities at deformable single doplets

Bäumler K, Wegener M, Bänsch E, Paschedag A (2009)

Publication Type: Conference contribution, Conference Contribution

Publication year: 2009

Conference Proceedings Title: Proceedings of the Seventh International Conference on CFD in the Minerals and Process Industries, CSIRO

Event location: Melbourne AU

Abstract

In liquid/liquid extraction processes, e.g. in ternary

systems, where the transfer of a solute between a

dispersed and a continuous phase is considered, reliable

predictions of mass transfer coefficients and retention

times are indispensable. Especially in the case, where

interfacial instabilities like drop deformation and

Marangoni-convection occur, th

e influencing factors and

their quantitative nature are not yet fully understood.

In our numerical model we consider a Newtonian viscous

two phase flow, representing a single deformable drop.

Simulations are performed using the academic code

NAVIER, which features a sharp interface model and a

variational formulation of the curvature. This approach

provides an effective method for a consistent, very exact

description of discrete surface stresses.

Results of drop rise velocitie

s and mass transfer rates in

the 2D case of spherical as well as deformable drops are

presented (diameters varying from 1

mm

to 5

mm)

.

The simulations are compared to experimental results in

the system water/toluene and to numerical results of non-

deformable drops obtained by STAR-CD. Especially with

the onset of drop deformation,

the system is excellently

reflected by the simulations, i.e. the terminal velocities

calculated with NAVIER show a deviation of no more

than 4% to the experimental results.

 

Authors with CRIS profile

Eberhard Bänsch Lehrstuhl für Angewandte Mathematik (Wissenschaftliches Rechnen)

Involved external institutions

Technische Universität Berlin DE Germany (DE) Alice Salomon University of Applied Sciences Berlin DE Germany (DE) Stanford University US United States (USA) (US)

How to cite

APA:

Bäumler, K., Wegener, M., Bänsch, E., & Paschedag, A. (2009). 2d simulations of interfacial instabilities at deformable single doplets. In Proceedings of the Seventh International Conference on CFD in the Minerals and Process Industries, CSIRO. Melbourne, AU.

MLA:

Bäumler, Kathrin, et al. "2d simulations of interfacial instabilities at deformable single doplets." Proceedings of the Seventh International Conference on CFD in the Minerals and Process Industries, CSIRO, Melbourne 2009.

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