All Outputs (47)

Fabrication with magnetic-spin coating: influence of magnetic-inertia energy ratio on gold-Pickering ferrofluid droplet assembly morphology. (2024)
Journal Article
OKPOZO, P., NJUGUNA, J., ISLAM, S., UYANGA, K. and PANCHOLI, K. 2024. Fabrication with magnetic-spin coating: influence of magnetic-inertia energy ratio on gold-Pickering ferrofluid droplet assembly morphology. Journal of magnetism and magnetic materials [online], 611, article number 172577. Available from: https://doi.org/10.1016/j.jmmm.2024.172577

Magnetic self-assembly of nanoparticles is a well-known technique for creating thin-film array-patterned functional microstructures. However, an uncontrollable hierarchical assembly formation of magnetically stimulated particles has hindered the desi... Read More about Fabrication with magnetic-spin coating: influence of magnetic-inertia energy ratio on gold-Pickering ferrofluid droplet assembly morphology..

Prediction of gas-water multiphase flow behaviour and hydrates severity in gas-dominant subsea pipeline. [Preprint] (2024)
Preprint / Working Paper
UMUTEME, O.M., ISLAM, S.Z., HOSSAIN, M. and KARNIK, A. 2024. Prediction of gas-water multiphase flow behaviour and hydrates severity in gas-dominant subsea pipeline. [Preprint]. Hosted on Preprints [online]. Available from: https://doi.org/10.20944/preprints202409.1227.v1

This study focuses on enhancing the prediction of flow characteristics in gas pipelines under hydrate-forming conditions using a validated CFD model. Four-Quadrants approach was introduced to analyse the relationship between gas and water flowrates,... Read More about Prediction of gas-water multiphase flow behaviour and hydrates severity in gas-dominant subsea pipeline. [Preprint].

Predicting hydrates plugging risk in subsea gas pipeline: CFD, analytical and linear regression modelling. (2024)
Thesis
UMUTEME, O.M. 2024. Predicting hydrates plugging risk in subsea gas pipeline: CFD, analytical and linear regression modelling. Robert Gordon University, PhD thesis. Hosted on OpenAIR [online]. Available from: https://doi.org/10.48526/rgu-wt-2571400

This study addresses critical limitations in managing hydrate plugging risk for gas pipelines. The main challenges lie in accurately predicting hydrate deposition rates and associated pressure drops. To overcome these limitations, the study developed... Read More about Predicting hydrates plugging risk in subsea gas pipeline: CFD, analytical and linear regression modelling..

Numerical investigations on the transient aerodynamic performance characterization of a multibladed vertical axis wind turbine. (2024)
Journal Article
CHRISTIE, J., LINES, T., SIMPSON, D., ASIM, T., SIDDIQUI, M.S. and ISLAM, S.Z. 2024. Numerical investigations on the transient aerodynamic performance characterization of a multibladed vertical axis wind turbine. Energies [online], 17(8), article number 1900. Available from: https://doi.org/10.3390/en17081900

The use of vertical axis wind turbines (VAWTs) in urban environments is on the rise due to their relatively smaller size, simpler design, lower manufacturing and maintenance costs, and above all, due to their omnidirectionality. The multibladed drag-... Read More about Numerical investigations on the transient aerodynamic performance characterization of a multibladed vertical axis wind turbine..

Analytical modelling of the hydraulic effect of hydrate deposition on transportability and plugging location in subsea gas pipelines. (2023)
Journal Article
UMUTEME, O.M., ISLAM, S.Z., HOSSAIN, M. and KARNIK, A. 2024. Analytical modelling of the hydraulic effect of hydrate deposition on transportability and plugging location in subsea gas pipelines. Proceedings of the Institution of Mechanical Engineers, Part C: journal of mechanical engineering science [online], 238(10), pages 4840-4865. Available from: https://doi.org/10.1177/09544062231196986

Accurate prediction of the hydraulic effect of hydrate deposition and plug location is critical to the safety and operability of natural gas transport pipelines, especially for gas-dominant subsea pipelines where maintenance and intervention activiti... Read More about Analytical modelling of the hydraulic effect of hydrate deposition on transportability and plugging location in subsea gas pipelines..

Start-up dynamics of vertical axis wind turbines: a review. (2023)
Journal Article
LOUGH, J., ASIM, T., COULL, S., MARSHALL, A., ISLAM, S.Z. and AMBER, I. 2023. Start-up dynamics of vertical axis wind turbines: a review. Journal of physics: conference series [online], 2626: proceedings from the 2023 EERA (European Energy Research Alliance) DeepWind conference, 18-20 January 2023, Trondheim, Norway, article 012006. Available from: https://doi.org/10.1088/1742-6596/2626/1/012006

Vertical Axis Wind Turbines (VAWTs) are becoming increasingly popular for wind power extraction due to their simpler design, lower manufacturing and maintenance costs. The omni-directionality of these power generating machines make them more suitable... Read More about Start-up dynamics of vertical axis wind turbines: a review..

Modelling hydrate deposition in gas-dominant subsea pipelines in operating and shutdown scenarios. (2023)
Journal Article
UMUTEME, O.M., ISLAM, S.Z., HOSSAIN, M. and KARNIK, A. 2023. Modelling hydrate deposition in gas-dominant subsea pipelines in operating and shutdown scenarios. Sustainability [online], 15(18), article number 13824. Available from: https://doi.org/10.3390/su151813824

This study addresses a significant research gap related to hydrate formation in subsea gas pipelines, with a specific focus on deposition rates during shutdown scenarios, which has received limited attention in previous studies. Past research has emp... Read More about Modelling hydrate deposition in gas-dominant subsea pipelines in operating and shutdown scenarios..

Computational fluid dynamics simulation of natural gas hydrate sloughing and pipewall shedding temperature profile: implications for CO2 transportation in subsea pipeline. (2023)
Journal Article
UMUTEME, O.M., ISLAM, S.Z., HOSSAIN, M. and KARNIK, A. 2023. Computational fluid dynamics simulation of natural gas hydrate sloughing and pipewall shedding temperature profile: implications for CO2 transportation in subsea pipeline. Gas science and engineering [online], 116, article number 205048. Available from: https://doi.org/10.1016/j.jgsce.2023.205048

The continuous flow assurance in subsea gas pipelines relies heavily on the assessment of temperature profile during hydrate sloughing and pipewall shedding caused by hydrates, with similar implications for carbon dioxide (CO2) transportation under h... Read More about Computational fluid dynamics simulation of natural gas hydrate sloughing and pipewall shedding temperature profile: implications for CO2 transportation in subsea pipeline..

Real-time monitoring of cement sheath integrity under high-angle HPHT wellbore conditions. (2023)
Thesis
WILCOX, L.B. 2023. Real-time monitoring of cement sheath integrity under high-angle HPHT wellbore conditions. Robert Gordon University, PhD thesis. Hosted on OpenAIR [online]. Available from: https://doi.org/10.48526/rgu-wt-2071847

The lengthy time span over which the cemented well needs to retain its integrity is a massive challenge today. The cement plugs in abandoned wells, in conjunction with the annular cement sheath, need to prevent leakages well beyond the life of the we... Read More about Real-time monitoring of cement sheath integrity under high-angle HPHT wellbore conditions..

The impact of ice formation on vertical axis wind turbine performance and aerodynamics. (2023)
Journal Article
GERRIE, S., ISLAM, S.Z., GERRIE, C., DROUBI, G. and ASIM, T. 2023. The impact of ice formation on vertical axis wind turbine performance and aerodynamics. Wind [online], 3(1), pages 16-24. Available from: https://doi.org/10.3390/wind3010003

This study investigated the impact of ice formation on the performance and aerodynamics of a vertical axis wind turbine (VAWT). This is an area that is becoming more prevalent as VAWTs are installed alongside horizontal axis wind turbines (HAWTs) in... Read More about The impact of ice formation on vertical axis wind turbine performance and aerodynamics..

3D CFD modelling of performance of a vertical axis turbine. (2023)
Journal Article
GERRIE, C., ISLAM, S.Z., GERRIE, S., TURNER, N. and ASIM, T. 2023. 3D CFD modelling of performance of a vertical axis turbine. Energies [online], 16(3), article 1144. Available from: https://doi.org/10.3390/en16031144

Recently, wind turbine research has switched focus to vertical axis wind turbines due to the extensive research that has been performed on horizontal axis wind turbines and the potential of vertical axis wind turbines in built-up areas. This study ai... Read More about 3D CFD modelling of performance of a vertical axis turbine..

Magnetic field directed self-assembly of gold Pickering emulsion for preparing patterned film. (2022)
Thesis
OKPOZO, O.P. 2022. Magnetic field directed self-assembly of gold Pickering emulsion for preparing patterned film. Robert Gordon University, PhD thesis. Hosted on OpenAIR [online]. Available from: https://doi.org/10.48526/rgu-wt-1987909

Patterning plays a vital in role in sensor-based devices like surface-enhanced Raman spectroscopy (SERS), surface-enhanced infrared absorption (SEIRA), radio frequency (RF) antennas and many others. The linear array spacing and width of gold strips h... Read More about Magnetic field directed self-assembly of gold Pickering emulsion for preparing patterned film..

An improved computational fluid dynamics (CFD) model for predicting hydrate deposition rate and wall shear stress in offshore gas-dominated pipeline. (2022)
Journal Article
UMUTEME, O.M., ISLAM, S.Z., HOSSAIN, M. and KARNIK, A. 2022. An improved computational fluid dynamics (CFD) model for predicting hydrate deposition rate and wall shear stress in offshore gas-dominated pipeline. Journal of natural gas science and engineering [online], 107, article 104800. Available from: https://doi.org/10.1016/j.jngse.2022.104800

Gas hydrates in pipelines is still a flow assurance problem in the oil and gas industry, and requires a proactive hydrate plugging risk predicting model. As an active area of research, this work has developed a 3D 10m length by 0.0204m diameter horiz... Read More about An improved computational fluid dynamics (CFD) model for predicting hydrate deposition rate and wall shear stress in offshore gas-dominated pipeline..

Investigation of the effects of pipe diameter of internal multiphase flow on pipe elbow vibration and resonance. [Dataset] (2022)
Data
ASIEGBU, N.M., HOSSAIN, M., DROUBI, G.M. and ISLAM, S.Z. 2023. Investigation of the effects of pipe diameter of internal multiphase flow on pipe elbow vibration and resonance. [Dataset]. Proceedings of the Institution of Mechanical Engineers, part E: journal of process mechanical engineering [online], 237(4), pages 1319-1330. Available from: https://journals.sagepub.com/doi/suppl/10.1177/09544089221115520

This output contains supplementary material of tables and figures to accompany the main article of 'Investigation of the effects of pipe diameter of internal multiphase flow on pipe elbow vibration and resonance' by Nkemjika Mirian Asiegbu, Mamdud Ho... Read More about Investigation of the effects of pipe diameter of internal multiphase flow on pipe elbow vibration and resonance. [Dataset].

Investigation of the effects of pipe diameter of internal multiphase flow on pipe elbow vibration and resonance. (2022)
Journal Article
ASIEGBU, N.M., HOSSAIN, M., DROUBI, G.M. and ISLAM, S.Z. 2023. Investigation of the effects of pipe diameter of internal multiphase flow on pipe elbow vibration and resonance. Proceedings of the Institution of Mechanical Engineers, part E: journal of process mechanical engineering [online], 237(4), pages 1319-1330. Available from: https://doi.org/10.1177/09544089221115520

Computational fluid dynamics modelling of internal two-phase flow induced transient forces at 90° elbows have been carried out to evaluate the effect of pipe diameter on the characteristics of multiphase flow induced vibration. Simulations of two-pha... Read More about Investigation of the effects of pipe diameter of internal multiphase flow on pipe elbow vibration and resonance..

Development of an optimised integrated underbalanced drilling strategy for cuttings transport in gas-liquid flow through wellbore annuli. (2022)
Thesis
MAHON, R. 2022. Development of an optimised integrated underbalanced drilling strategy for cuttings transport in gas-liquid flow through wellbore annuli. Robert Gordon University, PhD thesis. Hosted on OpenAIR [online]. Available from: https://doi.org/10.48526/rgu-wt-1880278

Although understanding the relationship between gas-liquid two-phase fluid flows and the effects of the major drilling variables is critical to optimising underbalanced drilling (UBD) operations, to date, this has been an area of limited research and... Read More about Development of an optimised integrated underbalanced drilling strategy for cuttings transport in gas-liquid flow through wellbore annuli..

A review of recent advancements in offshore wind turbine technology. (2022)
Journal Article
ASIM, T., ISLAM, S.Z., HEMMATI, A. and KHALID, M.S.U. 2022. A review of recent advancements in offshore wind turbine technology. Energies [online], 15(2), article 579. Available from: https://doi.org/10.3390/en15020579

Offshore wind turbines are becoming increasingly popular due to their higher wind energy harnessing capabilities and lower visual pollution. Researchers around the globe have been reporting significant scientific advancements in offshore wind turbine... Read More about A review of recent advancements in offshore wind turbine technology..

Computational fluid dynamics modelling of multi-phase flow transition in presence of solid particles. (2021)
Thesis
ALAITA, D.A. 2021. Computational fluid dynamics modelling of multi-phase flow transition in presence of solid particles. Robert Gordon University, PhD thesis. Hosted on OpenAIR [online]. Available from: https://doi.org/10.48526/rgu-wt-1603672

Multi-phase flow is the type of flow common in the oil and gas industry, as oil reservoirs contain mixtures of oil, gas and water with sand particles from sandstone reservoirs. Accurate design of oil and gas production equipment greatly depends on de... Read More about Computational fluid dynamics modelling of multi-phase flow transition in presence of solid particles..

Effects of damaged rotor on wake dynamics of vertical axis wind turbines. (2021)
Journal Article
ASIM, T. and ISLAM, S.Z. 2021. Effects of damaged rotor on wake dynamics of vertical axis wind turbines. Energies [online], 14(21), article 7060. Available from: https://doi.org/10.3390/en14217060

Vertical Axis Wind Turbines (VAWTs) are omni-directional turbomachines commonly used in rural areas for small-to-medium-scale power generation. The complex flow observed in the wake region of VAWTs is affected by a number of factors, such as rotor bl... Read More about Effects of damaged rotor on wake dynamics of vertical axis wind turbines..

Computational fluid dynamics modelling of fluid flow inside fractured reservoirs. (2021)
Thesis
AL-MASHHADANIE, H.A.J. 2021. Computational fluid dynamics modelling of fluid flow inside fractured reservoirs. Robert Gordon University, PhD thesis. Hosted on OpenAIR [online]. Available from: https://doi.org/10.48526/rgu-wt-1603660

Fractured media exist in most layers of the earth's crust, often dominating bulk properties of subsurface geological formations. Therefore, fractured media are involved in many key engineering sectors that impact humans living on Earth. Fractured for... Read More about Computational fluid dynamics modelling of fluid flow inside fractured reservoirs..