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Dr Abbas Hasan's Outputs (32)

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.

Effect of vibration after filling on mechanical reliability in thin wall investment casting with fillability filling regime—part 1 (2013)
Journal Article
Abdul-Karem, W., Green, N., Al-Raheem, K. F., & Hasan, A. H. A. (2013). Effect of vibration after filling on mechanical reliability in thin wall investment casting with fillability filling regime—part 1. International Journal of Advanced Manufacturing Technology, 67(9-12), 2075-2082. https://doi.org/10.1007/s00170-012-4632-z

A vibration technique is used in this study to explore the effect of low frequency vibration on the mechanical reliability of Al-7Si-Mg castings. The quality of castings is related to the number and the size of porosity and oxide film in thin wall in... Read More about Effect of vibration after filling on mechanical reliability in thin wall investment casting with fillability filling regime—part 1.

Theoretical and experimental study of bubbly gas-water two phase flows through a Universal Venturi Tube (UVT) (2012)
Journal Article
Hasan, A. H. A. M., Hadawey, A., Al-Wahaibi, Y., Abdul-Karem, W., & Al-Raheem, K. F. (2012). Theoretical and experimental study of bubbly gas-water two phase flows through a Universal Venturi Tube (UVT). International journal of information and education technology, 2(1), 43-58

Unlike single phase flows, the relationship between the phase flow rate and the pressure drop across a differential pressure device (e.g. Venturi) in multiphase flow measurements is not simple and should include the phase volume fractions or the mass... Read More about Theoretical and experimental study of bubbly gas-water two phase flows through a Universal Venturi Tube (UVT).

Measurement of a void fraction in bubbly gas-water two phase flows using differential pressure technique (2012)
Journal Article
Hasan, A. Measurement of a void fraction in bubbly gas-water two phase flows using differential pressure technique. Applied mechanics and materials, 152-154, 1221-1226. https://doi.org/10.4028/www.scientific.net/amm.152-154.1221

Multiphase flows, where two or even three fluids flow simultaneously in a pipe are becoming increasingly important in industry. In order to measure the flow rate of gas-water two phase flows accurately, the void fraction (gas volume fraction) in two... Read More about Measurement of a void fraction in bubbly gas-water two phase flows using differential pressure technique.

Experimental and theoretical study of the gas–water two phase flow through a conductance multiphase Venturi meter in vertical annular (wet gas) flow (2010)
Journal Article
Hasan, A. H., & Lucas, G. (2011). Experimental and theoretical study of the gas–water two phase flow through a conductance multiphase Venturi meter in vertical annular (wet gas) flow. Nuclear Engineering and Design, 241(6), 1998-2005. https://doi.org/10.1016/j.nucengdes.2010.09.006

Annular gas-liquid two phase flow widely occurs in nuclear industry. Various combinations of techniques have been employed in annular gas-liquid two phase flows to measure the flow parameters (e.g. liquid film thickness, gas volume fraction and the p... Read More about Experimental and theoretical study of the gas–water two phase flow through a conductance multiphase Venturi meter in vertical annular (wet gas) flow.

Modelling and measurement of the gas flow rate in vertical annular gas-water flow using a conductance multiphase Venturi meter (2009)
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.

Simulation and static measurement of the gas volume fraction in a separated flow model using a conductance multiphase Venturi meter (CMVM) (2008)
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) (2007)
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).