Imperial College London

Professor Omar K. Matar

Faculty of EngineeringDepartment of Chemical Engineering

Vice-Dean (Education), Faculty of Engineering
 
 
 
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Contact

 

+44 (0)20 7594 9618o.matar Website

 
 
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Assistant

 

Miss Nazma Mojid +44 (0)20 7594 3918

 
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Location

 

506ACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

263 results found

Sahu KC, Matar OK, 2010, Stability of Plane Channel Flow With Viscous Heating, JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME, Vol: 132, ISSN: 0098-2202

Journal article

Beacham DR, Matar OK, Craster RV, 2009, Surfactant-Enhanced Rapid Spreading of Drops on Solid Surfaces, LANGMUIR, Vol: 25, Pages: 14174-14181, ISSN: 0743-7463

Journal article

Mavromoustaki A, Lim B, Ng B, Mirza SM, Hate CP, Manolis I, Gringarten AC, Hewitt GF, Matar OKet al., 2009, An experimental study of wellbore phase redistribution effects in gas condensate reservoirs, 14th International Conference on Multiphase Production Technology, Pages: 245-263

This paper presents a series of experiments that were carried out at Imperial College to investigate Wellbore phase redistribution (WPR) phenomena. Results are being used to verify and calibrate a transient Wellbore multiphase simulator that will be used to predict the onset of WPR and design operating conditions to avoid or at least minimise it. The overall objective of the experimental study was to emulate two-phase flow in a gas condensate well-reservoir system. It was firstly aimed to investigate WPR effects independent of reservoir interaction and secondly as part of a gas condensate well-reservoir system in which the multiphase flow near the Wellbore and the single phase gas away from the well could be taken into account. The well was represented by a vertical tube of approximately 10.5 m in length, and gas and condensate by air and water, respectively. The reservoir was simulated with two pressurised vessels, one for water, the other for gas, feeding into the vertical tube. The effects of WPR on the isolated well were investigated by performing shut-in tests in which the bottom and top of the tube were closed off simultaneously. The reservoir impact on WPR effects was then investigated by creating steady state conditions and shutting in the vertical tube at the top to create a transient response. The resulting transient pressure data were analysed using well test interpretation methods. The steady state pressure and void fraction, measured along the tube, were used to validate GRAMP-2, a steady state Wellbore modelling code based on flow regime prediction developed at Imperial College. Good agreement was obtained with simulated and experimental results. © 2009 BHR Group Multiphase Production Technology.

Journal article

Craster RV, Matar OK, 2009, Dynamics and stability of thin liquid films, REVIEWS OF MODERN PHYSICS, Vol: 81, Pages: 1131-1198, ISSN: 0034-6861

Journal article

Sisoev GM, Matar OK, Sileri D, Lawrence CJet al., 2009, Wave regimes in two-layer microchannel flow, CHEMICAL ENGINEERING SCIENCE, Vol: 64, Pages: 3094-3102, ISSN: 0009-2509

Journal article

Craster RV, Matar OK, Papageorgiou DT, 2009, Breakup of surfactant-laden jets above the critical micelle concentration, JOURNAL OF FLUID MECHANICS, Vol: 629, Pages: 195-219, ISSN: 0022-1120

Journal article

Sahu KC, Ding H, Valluri P, Matar OKet al., 2009, Linear stability analysis and numerical simulation of miscible two-layer channel flow, PHYSICS OF FLUIDS, Vol: 21, ISSN: 1070-6631

Journal article

Sahu KC, Ding H, Valluri P, Matar OKet al., 2009, Pressure-driven miscible two-fluid channel flow with density gradients, PHYSICS OF FLUIDS, Vol: 21, ISSN: 1070-6631

Journal article

Craster RV, Matar OK, Sefiane K, 2009, Pinning, Retraction, and Terracing of Evaporating Droplets Containing Nanoparticles, LANGMUIR, Vol: 25, Pages: 3601-3609, ISSN: 0743-7463

Journal article

Matar OK, Craster RV, 2009, Dynamics of surfactant-assisted spreading, SOFT MATTER, Vol: 5, Pages: 3801-3809, ISSN: 1744-683X

Journal article

Shaw SJ, Spelt PDM, Matar OK, 2009, Electrically-induced bubble deformation, translation and collapse., Journal of Engineering Mathematics, Vol: 65, Pages: 291-310

Journal article

NĂ¡raigh LO, Matar OK, Spelt PDM, Zaki TAet al., 2008, Interfacial stability in turbulent pressure-driven channel flow, AIChE Annual Meeting, Conference Proceedings

Journal article

Sahu KC, Valluri P, Spelt PDM, Matar OKet al., 2008, Linear instability of pressure-driven channel flow of a Newtonian and a Herschel-Bulkley fluid (vol 19, art no 122101, 2007), PHYSICS OF FLUIDS, Vol: 20, ISSN: 1070-6631

Journal article

Sefiane K, Moffat JR, Matar OK, Craster RVet al., 2008, Self-excited hydrothermal waves in evaporating sessile drops, APPLIED PHYSICS LETTERS, Vol: 93, ISSN: 0003-6951

Journal article

Blackmond DG, Matar OK, 2008, Re-examination of reversibility in reaction models for the spontaneous emergence of homochirality, JOURNAL OF PHYSICAL CHEMISTRY B, Vol: 112, Pages: 5098-5104, ISSN: 1520-6106

Journal article

Matar OK, Sisoev GM, Lawrence CJ, 2008, Thin film flow over spinning discs: The effect of surface topography and flow rate modulation, CHEMICAL ENGINEERING SCIENCE, Vol: 63, Pages: 2225-2232, ISSN: 0009-2509

Journal article

Beacham DR, Matar OK, Craster RV, 2008, Advancing contact line dynamics induced by soluble surfactant deposition on a thin liquid film, 15th International Congress on Rheology/80th Annual Meeting of the Society-of-Rheology, Publisher: AMER INST PHYSICS, Pages: 1060-+, ISSN: 0094-243X

Conference paper

Matar OK, Sisoev GM, Lawrence CJ, 2008, Two-layer flow with one viscous layer in inclined channels, Mathematical Modelling of Natural Phenomena, Vol: 3, Pages: 126-148, ISSN: 0973-5348

We study pressure-driven, two-layer flow in inclined channels with high density and viscosity contrasts. We use a combination of asymptotic reduction, boundary-layer theory and the Karman-Polhausen approximation to derive evolution equations that describe the interfacial dynamics. Two distinguished limits are considered: where the viscosity ratio is small with density ratios of order unity, and where both density and viscosity ratios are small. The evolution equations account for the presence of inertia, gravity, capillarity and viscous retardation; attention is restricted to situations in which the flow is laminar. The results of our linear stability analysis and numerical simulations indicate that the flow is destabilised by positive channel inclination in the stably stratified case. The dependence of the nonlinear wave dynamics on system parameters is also explored.

Journal article

Matar OK, Craster RV, Kumar S, 2007, Falling films on flexible inclines, PHYSICAL REVIEW E, Vol: 76, ISSN: 2470-0045

Journal article

Matar OK, Craster RV, Sefiane K, 2007, Dynamic spreading of droplets containing nanoparticles, PHYSICAL REVIEW E, Vol: 76, ISSN: 1539-3755

Journal article

Matar OK, Lawrence CJ, Sisoev GM, 2007, Interfacial dynamics in pressure-driven two-layer laminar channel flow with high viscosity ratios, PHYSICAL REVIEW E, Vol: 75, ISSN: 2470-0045

Journal article

Craster RV, Matar OK, 2007, On autophobing in surfactant-driven thin films, LANGMUIR, Vol: 23, Pages: 2588-2601, ISSN: 0743-7463

Journal article

Yeo LY, Craster RV, Matar OK, 2007, Drop manipulation and surgery using electric fields, JOURNAL OF COLLOID AND INTERFACE SCIENCE, Vol: 306, Pages: 368-378, ISSN: 0021-9797

Journal article

Hu B, Matar OK, Hewitt GF, Angeli Pet al., 2007, Mean and turbulent fluctuating velocities in oil-water vertical dispersed flows, CHEMICAL ENGINEERING SCIENCE, Vol: 62, Pages: 1199-1214, ISSN: 0009-2509

Journal article

Matar OK, Kumar S, 2007, Dynamics and stability of flow down a flexible incline, JOURNAL OF ENGINEERING MATHEMATICS, Vol: 57, Pages: 145-158, ISSN: 0022-0833

Journal article

Sahu KC, Valluri P, Spelt PDM, Matar OKet al., 2007, Linear instability of pressure-driven channel flow of a Newtonian and a Herschel-Bulkley fluid, PHYSICS OF FLUIDS, Vol: 19

Journal article

Matar OK, Sisoev GM, Lawrence CJ, 2006, The flow of thin liquid films over spinning discs, CANADIAN JOURNAL OF CHEMICAL ENGINEERING, Vol: 84, Pages: 625-642, ISSN: 0008-4034

Journal article

Craster RV, Matar OK, 2006, On the dynamics of liquid lenses, JOURNAL OF COLLOID AND INTERFACE SCIENCE, Vol: 303, Pages: 503-516, ISSN: 0021-9797

Journal article

Sisoev GM, Craster RV, Matar OK, Gerasimov SVet al., 2006, Film flow down a fibre at moderate flow rates, CHEMICAL ENGINEERING SCIENCE, Vol: 61, Pages: 7279-7298, ISSN: 0009-2509

Journal article

Edmonstone BD, Craster RV, Matar OK, 2006, Surfactant-induced fingering phenomena beyond the critical micelle concentration, JOURNAL OF FLUID MECHANICS, Vol: 564, Pages: 105-138, ISSN: 0022-1120

Journal article

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