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Dr Abbas Hasan's Outputs (14)

Experimental study of interfacial structure of a falling liquid film in a vertical pipe (2015)
Presentation / Conference Contribution
Hasan, A., Azzopardi, B., & Hewakandamby, B. (2015, November). Experimental study of interfacial structure of a falling liquid film in a vertical pipe. Presented at American Physical Society-Fluid Dynamics Fall Meeting

Many studies in the literature provide time series data of the film thickness at one or two points on the pipe wall. Most of these studies focussed on either flat plates or small diameter pipes. The main aim of this paper is to study the characterist... Read More about Experimental study of interfacial structure of a falling liquid film in a vertical pipe.

Taylor bubbles at high viscosity ratios: experiments and numerical simulations (2015)
Presentation / Conference Contribution
Hasan, A., Hewakandamby, B., Azzopardi, B., Xie, Z., Pain, C., & Matar, O. (2015, November). Taylor bubbles at high viscosity ratios: experiments and numerical simulations. Presented at 68th Annual Meeting of the APS Division of Fluid Dynamics, USA, Boston

The Taylor bubble is a single long bubble which nearly fills the entire cross section of a liquid-filled circular tube, often occurring in gas-liquid slug flows in many industrial applications, particularly oil and gas production. The objective of th... Read More about Taylor bubbles at high viscosity ratios: experiments and numerical simulations.

Slugs in a large diameter column with air and high viscosity silicone oil (2014)
Presentation / Conference Contribution
Hasan, A., & Azzopardi, B. (2014, November). Slugs in a large diameter column with air and high viscosity silicone oil. Presented at 67th Annual Meeting of the APS Division of Fluid Dynamics, San Francisco, USA

Very little information is known about the behaviour of high viscous liquids (> 100 Pa.s) in two phase slug flows. Experiments were carried out to study the behaviour of silicone oil (300 Pa.s) in gas bubble column using electrical capacitance tomogr... Read More about Slugs in a large diameter column with air and high viscosity silicone oil.

Numerical study of Taylor bubbles with adaptive unstructured meshes (2014)
Presentation / Conference Contribution
Hasan, A., Xie, Z., Pavlidis, D., Percival, J., Pain, C., Matar, O., & Azzopardi, B. (2014, November). Numerical study of Taylor bubbles with adaptive unstructured meshes. Presented at 67th Annual Meeting of the APS Division of Fluid Dynamics, San Francisco, USA

The Taylor bubble is a single long bubble which nearly fills the entire cross section of a liquid-filled circular tube. This type of bubble flow regime often occurs in gas-liquid slug flows in many industrial applications, including oil-and-gas produ... Read More about Numerical study of Taylor bubbles with adaptive unstructured meshes.

Experimental characterization of interfacial wave structure of a falling liquid film in a vertical large pipe diameter
Presentation / Conference Contribution
Hasan, A., Azzopardi, B., Hewakandamby, B., AlAufi, Y., Watson, N., & Mohammed, S. (2016, May). Experimental characterization of interfacial wave structure of a falling liquid film in a vertical large pipe diameter. Presented at 9th International Conference of Multiphase Flow, ICMF, Italy

There is considerable literature on the thicknesses of falling liquid films, much of which is focussed on either flat plates or small diameter pipes. Many studies provide time series data of the film thickness at one or two points on the pipe wall. T... Read More about Experimental characterization of interfacial wave structure of a falling liquid film in a vertical large pipe diameter.

Modelling and measurement of the gas flow rate in vertical annular gas-water flow using a conductance multiphase Venturi meter
Presentation / Conference Contribution
Hasan, A., & Lucas, G. (2009, June). Modelling and measurement of the gas flow rate in vertical annular gas-water flow using a conductance multiphase Venturi meter. Presented at What Where When: Multi-dimensional Advances for Industrial Process Monitoring, University of Leeds, UK

Separated flow in a Venturi meter is highly complex and the application of a homogenous flow model could not reasonably be expected to lead to highly accurate results. If this is the case, a gas volume fraction measurement technique at the throat mus... Read More about Modelling and measurement of the gas flow rate in vertical annular gas-water flow using a conductance multiphase Venturi meter.

An experimental study of a falling liquid film in a vertical pipe
Presentation / Conference Contribution
Hasan, A., Azzopardi, B., Hewakandamby, B., Mohammed, S. K., & AlAufi, Y. (2019, October). An experimental study of a falling liquid film in a vertical pipe. Presented at 10th World Congress of Chemical Engineering, Spain

The majority of the experimental and theoretical studies in literature on the falling liquid film focus on either small diameter pipes or flat plates. Almost, all these studies provide time series data of the film thickness at a single point on the p... Read More about An experimental study of a falling liquid film in a vertical pipe.

Thin film thickness measurements using ultrasonic pulse echo technique
Presentation / Conference Contribution
Hasan, A., AlAufi, Y., Watson, N., Azzopardi, B., Hewakandamby, B., Dimitrakis, G., & Kalashnikov, A. N. (2016, May). Thin film thickness measurements using ultrasonic pulse echo technique. Presented at ICMF-2016 – 9th International Conference on Multiphase Flow, Firenze

Simulation and static measurement of the gas volume fraction in a separated flow model using a conductance multiphase Venturi meter (CMVM)
Presentation / Conference Contribution
Hasan, A., & Lucas, G. (2008, November). Simulation and static measurement of the gas volume fraction in a separated flow model using a conductance multiphase Venturi meter (CMVM). Presented at Proceedings of the Computing and Engineering Annual Researchers’ Conference, Huddersfield, UK

The assumption of equal mixture densities at the inlet and the throat of the Venturi is only valid in a homogenous flow. This assumption is no longer valid for a separated flow and therefore, the measurement of the gas volume fraction at the throat m... Read More about Simulation and static measurement of the gas volume fraction in a separated flow model using a conductance multiphase Venturi meter (CMVM).

Modeling of a homogenous gas-water two phase flow through a Venturi and vertical pipe; (A prediction of pressure drop sign change in two phase flow)
Presentation / Conference Contribution
Hasan, A., & Lucas, G. (2007, December). Modeling of a homogenous gas-water two phase flow through a Venturi and vertical pipe; (A prediction of pressure drop sign change in two phase flow). Presented at Proceedings of the Computing and Engineering Annual Researchers’ Conference, Huddersfield

In two phase flow, differential pressures technique can be used to measure the volume fraction of the gas phase. In the
case where no restriction is available in the pipeline, the differential pressure technique can be used only in vertical or
incl... Read More about Modeling of a homogenous gas-water two phase flow through a Venturi and vertical pipe; (A prediction of pressure drop sign change in two phase flow).