Imperial College London

Emeritus ProfessorGeoffreyHewitt

Faculty of EngineeringDepartment of Chemical Engineering

Emeritus Professor
 
 
 
//

Contact

 

+44 (0)20 7594 5562g.hewitt

 
 
//

Assistant

 

Mrs Sarah Payne +44 (0)20 7594 5567

 
//

Location

 

507aACE ExtensionSouth Kensington Campus

//

Summary

 

Publications

Publication Type
Year
to

224 results found

Hale CP, Hewitt GF, Manolis IG, Mendes MA, Richardson SM, Wong WLet al., 2005, Experimental and analytical studies of gas entrainment phenomena in slug flow in horizontal and near horizontal pipes, Multiphase Science & Technology, Vol: 17, Pages: 147-168, ISSN: 0276-1459

Journal article

Wong WL, Hale CP, Hewitt GF, Hu B, Lao L, Lawrence CJ, Mayer P, Parsonage D, Ujang PMet al., 2004, Three-phase flows in complex geometries, 4th North American Conference on Multiphase Technology, Pages: 251-269

Slug evolution is a process made more complex by the presence of large amplitude waves, the variation of the liquid depth ahead of the slug, and the entrainment of the gas phase into the slug body. Experiments "tracking" the evolution of slugs in three phase air-water-oil flows have been conducted for both horizontal and "V"-section pipe configurations on the WASP facility at Imperial College London. The oil was Shell Tellus 22 (ρoil=865 kgm-3 @ 15°C, μoil=0.04 Pas @ 20°C, σoil=0.032 Nm @ 25°C). Measurements were obtained for several liquid and gas superficial velocities over a range of water cuts. Details of the interfacial development, slug frequency and average liquid holdup were obtained at 7 axial locations using gamma densitometers. Tomographic images illustrating the transverse distribution of the phases within the liquid slug were constructed by conditional sampling of the output from a traversing beam gamma densitometer.

Journal article

Sun G, Hewitt GF, Wadekar VV, 2004, A heat transfer model for slug flow in a horizontal tube, INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, Vol: 47, Pages: 2807-2816, ISSN: 0017-9310

Journal article

Ng TS, Lawrence CJ, Hewittt GF, 2004, Friction factors in stratified two-phase flows, CHEMICAL ENGINEERING RESEARCH & DESIGN, Vol: 82, Pages: 309-320, ISSN: 0263-8762

Journal article

Su J, Hewitt GF, 2004, Inverse heat conduction problem of estimating time-varying heat transfer coefficient, NUMERICAL HEAT TRANSFER PART A-APPLICATIONS, Vol: 45, Pages: 777-789, ISSN: 1040-7782

Journal article

Wong WL, Richardson SM, Hewitt GF, 2004, Analysis of phase distribution in two-phase air-water slug bodies (Paper 387), 5th international conference multiphase flow, Yokohama, 2004

Conference paper

Hewitt GF, 2003, Workshop on Scientific Issues in Multiphase Flow Summary of contributions, Multiphase Science and Technology, Vol: 15, Pages: 1-19, ISSN: 0276-1459

This Summary introduces and discusses papers presented in this issue of Multiphase Science and Technology which had their origin at the Workshop on Scientific Issues in Multiphase Flow held at the University of Illinois in May 2002. The areas covered were: Flow Regimes in Multi-fluid Flow, Disperse Flow, Computational Physics and Micro Physics.

Journal article

Falcone G, Hewitt GF, Lao L, Richardson SMet al., 2003, Anumet: A Novel Wet Gas Flowmeter, Proceedings - SPE Annual Technical Conference and Exhibition, Pages: 4001-4012

Wet gas metering is rapidly establishing itself as a special problem area within the more general area of multiphase flow metering. In fact, while attempts are being made across the Oil and Gas Industry to define the boundaries between humid gas, gas-condensate and high GVF (gas volume fraction) multiphase systems, a few commercial wet gas meters are already available for specific field applications. A major interest of Imperial College has been the development of metering schemes for three-phase (oil-gas-water) flows in oil-field production systems. Imperial College has already developed a flow meter (MIXMETER) 1, which performs satisfactorily in the range of gas volume fractions of 0 to 90%. Imperial College has therefore been recently developing a new concept (ANUMET), which shows some promise for measuring two-phase flows at much higher gas volume fractions. The technical description of the ANUMET wet gas meter is outlined in this paper. Preliminary experiments on this new metering concept have been carried out with air-water flows in a 32 mm diameter tube in the LOTUS (LongTUbeSystem) facility at Imperial College. Encouraging results have been obtained and they are presented here.

Journal article

Barbosa JR, Hewitt GF, Richardson SM, 2003, High-speed visualisation of nucleate boiling in vertical annular flow, INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, Vol: 46, Pages: 5153-5160, ISSN: 0017-9310

Journal article

Hewitt GF, 2003, Flow regimes: Transitions and flow behaviour, Multiphase Science and Technology, Vol: 15, Pages: 131-143, ISSN: 0276-1459

The limitations of current methods for predicting flow patterns are discussed and a plea is made for two specific flow patterns (namely churn flow and wispy annular flow) to be recognised and more widely studied. Issues arising in annular, slug, stratified and bubbly flows are reviewed.

Journal article

Hewitt GF, 2003, Prediction of multiphase flows: A personal view, Multiphase Science and Technology, Vol: 15, Pages: 289-292, ISSN: 0276-1459

A short overview is given of the historical development and future prospects for predicting multiphase systems. This starts with a discussion of empirical correlations and goes on to review the roles of phenomenological models, multifluid models and direct numerical simulation (DNS).

Journal article

Barbosa JR, Hewitt GF, Richardson SM, 2003, A note on the influence of droplet interchange on evaporation and condensation of multicomponent mixtures in annular flow, INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, Vol: 46, Pages: 2505-2509, ISSN: 0017-9310

Journal article

Yeo LY, Matar OK, de Ortiz ESP, Hewitt GEet al., 2003, Film drainage between two surfactant-coated drops colliding at constant approach velocity, JOURNAL OF COLLOID AND INTERFACE SCIENCE, Vol: 257, Pages: 93-107, ISSN: 0021-9797

Journal article

Choudhury TH, Duggan NK, Hu B, Richardson SM, Hewitt GFet al., 2003, Experimental studies of heat transfer in a tube bundle model (Paper TR2a), Proceedings of 8th UK national heat transfer conference, Oxford, 2003

Conference paper

Falcone G, Hewitt GF, Lao L, Richardson SMet al., 2003, ANUMET: a novel wet gas flowmeter (Paper SPE 84504), Proceedings of SPE annual technical conference, Denver, 2003

Conference paper

Bonizzi M, Issa RI, Hewitt GF, Mendes-Tatsis A, Odozi Oet al., 2003, Studies of three phase oil-water-gas flow in pipelines, Cranfield, 11th international conference on multiphase; extending the boundaries of flow assurance, San Remo, Italy, Publisher: BHR Group, Pages: 407-426

Conference paper

Choudhury TH, Duggan NK, Hu B, Richardson SM, Hewitt GFet al., 2003, Experimental studies of heat transfer in a tube bundle model (Paper TR2a), Proceedings of 8th UK national heat transfer conference, Oxford, 2003

Conference paper

Yeo LY, Matar OK, Perez de Ortiz ES, Hewitt GFet al., 2002, A description of phase inversion behaviour in agitated liquid-liquid dispersions under the influence of the Marangoni effect, CHEMICAL ENGINEERING SCIENCE, Vol: 57, Pages: 3505-3520, ISSN: 0009-2509

Journal article

Ng TS, Lawrence CJ, Hewitt GF, 2002, Laminar stratified pipe flow, INTERNATIONAL JOURNAL OF MULTIPHASE FLOW, Vol: 28, Pages: 963-996, ISSN: 0301-9322

Journal article

Barbosa JR, Kandlbinder T, Hewitt GF, 2002, Forced convective boiling of ternary mixtures at high qualities, INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, Vol: 45, Pages: 2655-2665, ISSN: 0017-9310

Journal article

Barbosa JR, Hewitt GF, Konig G, Richardson SMet al., 2002, Liquid entrainment, droplet concentration and pressure gradient at the onset of annular flow in a vertical pipe, INTERNATIONAL JOURNAL OF MULTIPHASE FLOW, Vol: 28, Pages: 943-961, ISSN: 0301-9322

Journal article

Yeo LY, Matar OK, de Ortiz ESP, Hewitt GFet al., 2002, Simulation studies of phase inversion in agitated vessels using a Monte Carlo technique, JOURNAL OF COLLOID AND INTERFACE SCIENCE, Vol: 248, Pages: 443-454, ISSN: 0021-9797

Journal article

Falcone G, Hewitt GF, Alimonti C, Harrison Bet al., 2002, Multiphase flow metering: Current trends and future developments, 2001 SPE Annual Technical Conference and Exhibition, Publisher: SOC PETROLEUM ENG, Pages: 77-84, ISSN: 0149-2136

Conference paper

Barbosa JR, Hewitt GF, Richardson SM, 2002, Improved annular flow modelling of pure fluids and multicomponent mixtures, 7th National Conference on Heat Transfer, Publisher: INST CHEMICAL ENGINEERS, Pages: 261-266, ISSN: 0263-8762

Conference paper

Barbosa JR, Hewitt GF, Richardson SM, 2002, Forced convective boiling of steam-water in a vertical annulus at high qualities, EXPERIMENTAL THERMAL AND FLUID SCIENCE, Vol: 26, Pages: 65-75, ISSN: 0894-1777

Journal article

Yeo LY, Matar OK, de Ortiz ESP, Hewitt GFet al., 2002, A simple predictive tool for modelling phase inversion in liquid-liquid dispersions, CHEMICAL ENGINEERING SCIENCE, Vol: 57, Pages: 1069-1072, ISSN: 0009-2509

Journal article

Soleimani A, Lawrence CJ, Hewitt GF, 2002, The decay of swirl in horizontal dispersed oil-water flow, CHEMICAL ENGINEERING RESEARCH & DESIGN, Vol: 80, Pages: 145-154, ISSN: 0263-8762

Journal article

Lau L, Mendes MA, Hewitt GF, 2002, Pressure gradient prediction in vertical counter-current flows, Multiphase Science & Technology, Vol: 14, Pages: 95-107, ISSN: 0276-1459

Journal article

Valluri P, Matar OK, Mendes MA, Hewitt GFet al., 2002, Modelling hydrodynamics and mass transfer in structured packings (A review), Multiphase Science & Technology, Vol: 14, Pages: 303-348, ISSN: 0276-1459

Journal article

Valluri P, Matar OK, Mendes MA, Hewitt GFet al., 2002, Modelling hydrodynamics and mass transfer in structured packings (A review), Multiphase Science & Technology, Vol: 14, Pages: 303-348, ISSN: 0276-1459

Journal article

This data is extracted from the Web of Science and reproduced under a licence from Thomson Reuters. You may not copy or re-distribute this data in whole or in part without the written consent of the Science business of Thomson Reuters.

Request URL: http://wlsprd.imperial.ac.uk:80/respub/WEB-INF/jsp/search-html.jsp Request URI: /respub/WEB-INF/jsp/search-html.jsp Query String: id=00002710&limit=30&person=true&page=4&respub-action=search.html