The University of Southampton
University of Southampton Institutional Repository

Dissolution behaviour of a binary mixture in a capillary tube

Stevar, M.S.P. and Vorobev, Anatoliy (2011) Dissolution behaviour of a binary mixture in a capillary tube At 16th European Symposium on Improved Oil Recovery, United Kingdom. 12 - 14 Apr 2011. 13 pp.

Record type: Conference or Workshop Item (Paper)


We develop a pore-level physical model for the process of miscible displacement through porous media. Using the network model, the current task is reduced to the study of the dissolution dynamics of a binary mixture within a single capillary tube. Tubes of rather small diameters are considered when the typical diffusion and convective time scales are comparable. The test tube filled with the solute is immersed into the solvent-filled thermostatic bath; no pressure difference between the ends of the tubes is applied. Using a high-resolution video-camera, we study the solvent penetration into the test tube. We examine the evolution of the isobutyric acid/water mixture far from and close to the critical (consolute) point (which is 26C for this mixture). The mixture fills the circular glass tubes of diameters 0.4mm-0.8mm and of various lengths. The shape of the interface and its position are tracked and analysed. Based on our observations the following conclusions can be drawn. In all experiments, we observe a front-type propagation of the solvent phase into the tube with a clearly visible interface. The gravity force significantly affects the shape of the interface and the dissolution dynamics in all undertaken experiments. If the mixture temperature is below the critical point, then the uneven one-sided penetration of the solvent into the tube was consistently observed. The solute/solvent interface experiences oscillations of its shape (being either concave or convex at different time moments). If the mixture temperature is above the critical point, then the solvent penetrates evenly from both ends. In both under- and supercritical conditions, the contact line moves with the same speed as the interface, but the apparent contact angle is time- and coordinate-dependent. The rate of the interface propagation varies at different stages of the dissolution process and does not follow the predictions of the diffusion theory.

PDF EarthDoc-49637[1].pdf - Other
Download (1MB)

More information

e-pub ahead of print date: April 2011
Venue - Dates: 16th European Symposium on Improved Oil Recovery, United Kingdom, 2011-04-12 - 2011-04-14
Organisations: Engineering Science Unit


Local EPrints ID: 337749
PURE UUID: b8bfc04c-053a-4e13-bc73-d8e003eaecef

Catalogue record

Date deposited: 03 May 2012 10:31
Last modified: 18 Jul 2017 06:01

Export record


Author: M.S.P. Stevar

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.