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Experimental investigations on the thermal characteristics of domestic convectors. (2024)
Journal Article
GIBB, D., OLIPHANT, J., MCINTOSH, R.G., ASIM, T. and KARNIK, A. 2024. Experimental investigations on the thermal characteristics of domestic convectors. Energies [online], 17(5), article number 1017. Available from: https://doi.org/10.3390/en17051017

Better understanding of local thermal characteristics of domestic convectors could play a crucial role in reducing energy consumption for space heating and decarbonizing the economy. The current study evaluates the impact of varying water inlet tempe... Read More about Experimental investigations on the thermal characteristics of domestic convectors..

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..

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..

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..

Numerical study of pipeline leak detection for gas-liquid stratified flow. (2021)
Journal Article
ADEGBOYE, M.A., KARNIK, A. and FUNG, W.-K. 2021. Numerical study of pipeline leak detection for gas-liquid stratified flow. Journal of natural gas science and engineering [online], 94, article 104054. Available from: https://doi.org/10.1016/j.jngse.2021.104054

Multiphase flows are of paramount importance in the oil and gas industry, considering that most petroleum industries produce and transport oil and gas simultaneously. However, systematic research on pipeline leakage conveying more than one phase at a... Read More about Numerical study of pipeline leak detection for gas-liquid stratified flow..

Recent advances in pipeline monitoring and oil leakage detection technologies: principles and approaches. (2019)
Journal Article
ADEGBOYE, M.A., FUNG, W.-K. and KARNIK, A. 2019. Recent advances in pipeline monitoring and oil leakage detection technologies: principles and approaches. Sensors [online], 19(11), article ID 2548. Available from: https://doi.org/10.3390/s19112548

Pipelines are widely used for the transportation of hydrocarbon fluids over millions of miles all over the world. The structures of the pipelines are designed to withstand several environmental loading conditions to ensure safe and reliable distribut... Read More about Recent advances in pipeline monitoring and oil leakage detection technologies: principles and approaches..

Mitigation of preferential concentration of small inertial particles in stationary isotropic turbulence using electrical and gravitational body forces. (2012)
Journal Article
KARNIK, A.U. and SHRIMPTON, J.S. 2012. Mitigation of preferential concentration of small inertial particles in stationary isotropic turbulence using electrical and gravitational body forces. Physics of fluids [online], 24(7), article ID 073301. Available from: https://doi.org/10.1063/1.4732540

Particles with a certain range of Stokes numbers preferentially concentrate due to action of turbulent motion and body forces such as gravity are known to influence this process. The effect of electric charge, residing on particles, upon the phenomen... Read More about Mitigation of preferential concentration of small inertial particles in stationary isotropic turbulence using electrical and gravitational body forces..