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Coalescence in dense water/oil dispersions

Thesis/Dissertation:

Abstract

This project has been divided into three parts. The first part has been to review a large amount of literature to obtain models describing separate stages of the coalescence of a single drop at an interface. These stages include the drop deformation, the film thinning, the critical film thickness, and the drop breakup. The second part has been to evaluate the different models and select which to use in the development of the OneDrop program. The models describing drop deformation and film thinning were supplied by Charles and Mason, however the film thinning model has been slightly enhanced in this project. The models and the enhancements made have been compared to experimental data from the literature and from work done by undergraduate students at our department. The third part of the project has been to implement the models to drop-drop coalescence, and to write the SIM program to simulate the coalescence in a system of many drops. We use the same equations as in the OneDrop case, except for the film thinning. But by using a similar derivation as for the OneDrop case, an equation for the SIM case has been developed. We have made the assumption that the physical  More>>
Authors:
Publication Date:
Jun 01, 1993
Product Type:
Thesis/Dissertation
Report Number:
NEI-NO-385
Reference Number:
SCA: 020400; PA: NW-94:005027; NTS-94:011668; EDB-94:043328; ERA-19:011560; SN: 94001153960
Resource Relation:
Other Information: TH: Thesis (Dr.ing.); PBD: Jun 1993
Subject:
02 PETROLEUM; COALESCENCE; MATHEMATICAL MODELS; PETROLEUM; EMULSIONS; WATER; COMPUTERIZED SIMULATION; DEMULSIFICATION; OIL SPILLS; SURFACTANTS; EXPERIMENTAL DATA; 020400; PROCESSING
OSTI ID:
10131092
Research Organizations:
Trondheim Univ. (Norway). Norges Tekniske Hoegskole
Country of Origin:
Norway
Language:
English
Other Identifying Numbers:
Other: ON: DE94743504; ISBN 82-7119-518-2; TRN: NO9405027
Availability:
OSTI; NTIS
Submitting Site:
NW
Size:
310 p.
Announcement Date:

Thesis/Dissertation:

Citation Formats

Thunem, H. Coalescence in dense water/oil dispersions. Norway: N. p., 1993. Web.
Thunem, H. Coalescence in dense water/oil dispersions. Norway.
Thunem, H. 1993. "Coalescence in dense water/oil dispersions." Norway.
@misc{etde_10131092,
title = {Coalescence in dense water/oil dispersions}
author = {Thunem, H}
abstractNote = {This project has been divided into three parts. The first part has been to review a large amount of literature to obtain models describing separate stages of the coalescence of a single drop at an interface. These stages include the drop deformation, the film thinning, the critical film thickness, and the drop breakup. The second part has been to evaluate the different models and select which to use in the development of the OneDrop program. The models describing drop deformation and film thinning were supplied by Charles and Mason, however the film thinning model has been slightly enhanced in this project. The models and the enhancements made have been compared to experimental data from the literature and from work done by undergraduate students at our department. The third part of the project has been to implement the models to drop-drop coalescence, and to write the SIM program to simulate the coalescence in a system of many drops. We use the same equations as in the OneDrop case, except for the film thinning. But by using a similar derivation as for the OneDrop case, an equation for the SIM case has been developed. We have made the assumption that the physical phenomena regarding drop deformation, film thinning and critical film thickness are the same in the OneDrop and SIM cases, so the experimental validation of OneDrop also apply to SIM. By using the results from the SIM program, we can obtain some information about how different physical parameters will affect the collision frequency and collision efficiency. We may use this information to derive empirical equations describing these parameters effect on the coalescence probability in a dispersion. 207 refs., 83 figs., 21 tabs.}
place = {Norway}
year = {1993}
month = {Jun}
}