Details of Grant 

EPSRC Reference:	GR/L84216/01
Title:	JREI: TO STUDY DROP AND FLUID MOTION IN LIQUID/ LIQUID EMULSIONS USING A PHOTOCHROMIC DYE TRACING TECHNIQUE
Principal Investigator:	Hewitt, Professor GF
Other Investigators:	Mendes, Dr A Lawrence, Professor CJ Mendes-Tatsis, Dr M Mendes, Dr A
Researcher Co-Investigators:
Project Partners:	Norsk Hydro Oxford Lasers Ltd Pre Nexus Migration
Department:	Chemical Engineering
Organisation:	Imperial College London
Scheme:	JREI
Starts:	30 June 1998	Ends:	29 June 2001	Value (£):	90,079
EPSRC Research Topic Classifications:	Multiphase Flow
EPSRC Industrial Sector Classifications:	No relevance to Underpinning Sectors
Related Grants:
Panel History:
Summary on Grant Application Form
Liquid-liquid dispersed systems are of prime importance on many industries, notably the oil industry . In order to fully underatnd the mechanisms involved during their flow in pipes and in separation a detailed knowledge of the motion of each phase is required. It is proposed to acheive this by using both endoscope viewing, coupled with laser flash illumination, and a photochromic dye tracing technique. Both techniques have been previously used at Imperial College but the new equipment will allow them to be greatly improved and applied over a wider range of velocities and dispersed phase concentrations.Matching the refractive index of the two liquids created a transparent emulsion in which the twoi phases are indistinguishavble cinec the light scattering effects, which hinder emulsion drop visualtisaiotn, have been removed. Using two photochromic dyes, one of which is introduced into each phase, the motion of the different phases can be observed. A pulsed sheet of UV laser light is introduced into the flow field at the required location giving a local slice through the dispersion.This propsal will allow simultaneous visualisation of the motion of both phases in liquid-liquid mixtures as well as the determination of the velocity and size of the dispersed elements.
Key Findings
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Organisation Website:	http://www.imperial.ac.uk