CFD modeling of particle settling in drilling fluids: Impact of fluid rheology and particle characteristics
<p dir="ltr">The settling of drilling cuttings is important for the drilling and clean-out operations. The current article provides a Computational Fluid Dynamics (CFD) modeling study of particle settling behavior during the drilling operations, with a special focus on the impact of...
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2021
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| author | Abdelrahman M. Awad (16932519) |
| author2 | Ibnelwaleed A. Hussein (5535953) Mustafa S. Nasser (9385023) Hamidreza Karami (16932522) Ramadan Ahmed (16932525) |
| author2_role | author author author author |
| author_facet | Abdelrahman M. Awad (16932519) Ibnelwaleed A. Hussein (5535953) Mustafa S. Nasser (9385023) Hamidreza Karami (16932522) Ramadan Ahmed (16932525) |
| author_role | author |
| dc.creator.none.fl_str_mv | Abdelrahman M. Awad (16932519) Ibnelwaleed A. Hussein (5535953) Mustafa S. Nasser (9385023) Hamidreza Karami (16932522) Ramadan Ahmed (16932525) |
| dc.date.none.fl_str_mv | 2021-04-01T00:00:00Z |
| dc.identifier.none.fl_str_mv | 10.1016/j.petrol.2020.108326 |
| dc.relation.none.fl_str_mv | https://figshare.com/articles/journal_contribution/CFD_modeling_of_particle_settling_in_drilling_fluids_Impact_of_fluid_rheology_and_particle_characteristics/24083682 |
| dc.rights.none.fl_str_mv | CC BY 4.0 info:eu-repo/semantics/openAccess |
| dc.subject.none.fl_str_mv | Engineering Fluid mechanics and thermal engineering Resources engineering and extractive metallurgy Particle settling Cuttings shape Drilling fluid Aspect ratio Drag coefficient Particle size distribution |
| dc.title.none.fl_str_mv | CFD modeling of particle settling in drilling fluids: Impact of fluid rheology and particle characteristics |
| dc.type.none.fl_str_mv | Text Journal contribution info:eu-repo/semantics/publishedVersion text contribution to journal |
| description | <p dir="ltr">The settling of drilling cuttings is important for the drilling and clean-out operations. The current article provides a Computational Fluid Dynamics (CFD) modeling study of particle settling behavior during the drilling operations, with a special focus on the impact of fluid rheology, flow regime, particle size and shape on the settling rate. The Eulerian-Lagrangian method are adopted to track particle trajectories in a shear-thinning fluid under quiescent conditions. The rheological properties of the drilling fluids are described by different rheological models. Settling of spherical and ellipsoidal cuttings, with various aspect ratios, is studied for particles with a diameter ranging between 2 and 6 mm. The settling behavior is predicted for particles with narrow (0.5–2 mm), medium (0.5–6 mm) and broad (0.5–10 mm) particle size distributions (PSD). Applying a non-Newtonian powerlaw model at low shear rates, where the fluid is in the Newtonian regime, resulted in 11–19% over-prediction of settling velocities as compared to the experimental data. On the other hand, ignoring the particle-induced shear rate by assuming a Newtonian fluid behavior in the transition regime showed 8–10% difference between the estimated and experimental settling rates. Therefore, the CFD computations of settling rates suggest that Cross and Carreau models provide more accurate predictions than a simple power-law model. The selection of the suitable rheological model is a key factor in predicting settling in drilling fluids. This is more important for small particles where the Newtonian behavior is dominant and particle-induced shear rate is low. Ellipsoidal cuttings exhibited significantly greater resistance to settling as compared to spherical particles, mainly due to the increased drag force. Further, the terminal settling velocity of ellipsoidal cuttings consistently increased with the particle aspect ratio. Cuttings with broad PSD showed ~32 times higher settling velocity than particles with narrow PSD. CFD results are validated with experimental measurements. Moreover, results for settling of nonspherical particles are validated with an empirical correlation. Agreement of experimental and theoretical predictions is observed when the fluid and flow regimes are well identified and described.</p><h2>Other Information</h2><p dir="ltr">Published in: Journal of Petroleum Science and Engineering<br>License: <a href="http://creativecommons.org/licenses/by/4.0/" target="_blank">http://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.1016/j.petrol.2020.108326" target="_blank">https://dx.doi.org/10.1016/j.petrol.2020.108326</a></p> |
| eu_rights_str_mv | openAccess |
| id | Manara2_e6ea13397f8487ed194cbd5cfb231254 |
| identifier_str_mv | 10.1016/j.petrol.2020.108326 |
| network_acronym_str | Manara2 |
| network_name_str | Manara2 |
| oai_identifier_str | oai:figshare.com:article/24083682 |
| publishDate | 2021 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | CC BY 4.0 |
| spelling | CFD modeling of particle settling in drilling fluids: Impact of fluid rheology and particle characteristicsAbdelrahman M. Awad (16932519)Ibnelwaleed A. Hussein (5535953)Mustafa S. Nasser (9385023)Hamidreza Karami (16932522)Ramadan Ahmed (16932525)EngineeringFluid mechanics and thermal engineeringResources engineering and extractive metallurgyParticle settlingCuttings shapeDrilling fluidAspect ratioDrag coefficientParticle size distribution<p dir="ltr">The settling of drilling cuttings is important for the drilling and clean-out operations. The current article provides a Computational Fluid Dynamics (CFD) modeling study of particle settling behavior during the drilling operations, with a special focus on the impact of fluid rheology, flow regime, particle size and shape on the settling rate. The Eulerian-Lagrangian method are adopted to track particle trajectories in a shear-thinning fluid under quiescent conditions. The rheological properties of the drilling fluids are described by different rheological models. Settling of spherical and ellipsoidal cuttings, with various aspect ratios, is studied for particles with a diameter ranging between 2 and 6 mm. The settling behavior is predicted for particles with narrow (0.5–2 mm), medium (0.5–6 mm) and broad (0.5–10 mm) particle size distributions (PSD). Applying a non-Newtonian powerlaw model at low shear rates, where the fluid is in the Newtonian regime, resulted in 11–19% over-prediction of settling velocities as compared to the experimental data. On the other hand, ignoring the particle-induced shear rate by assuming a Newtonian fluid behavior in the transition regime showed 8–10% difference between the estimated and experimental settling rates. Therefore, the CFD computations of settling rates suggest that Cross and Carreau models provide more accurate predictions than a simple power-law model. The selection of the suitable rheological model is a key factor in predicting settling in drilling fluids. This is more important for small particles where the Newtonian behavior is dominant and particle-induced shear rate is low. Ellipsoidal cuttings exhibited significantly greater resistance to settling as compared to spherical particles, mainly due to the increased drag force. Further, the terminal settling velocity of ellipsoidal cuttings consistently increased with the particle aspect ratio. Cuttings with broad PSD showed ~32 times higher settling velocity than particles with narrow PSD. CFD results are validated with experimental measurements. Moreover, results for settling of nonspherical particles are validated with an empirical correlation. Agreement of experimental and theoretical predictions is observed when the fluid and flow regimes are well identified and described.</p><h2>Other Information</h2><p dir="ltr">Published in: Journal of Petroleum Science and Engineering<br>License: <a href="http://creativecommons.org/licenses/by/4.0/" target="_blank">http://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.1016/j.petrol.2020.108326" target="_blank">https://dx.doi.org/10.1016/j.petrol.2020.108326</a></p>2021-04-01T00:00:00ZTextJournal contributioninfo:eu-repo/semantics/publishedVersiontextcontribution to journal10.1016/j.petrol.2020.108326https://figshare.com/articles/journal_contribution/CFD_modeling_of_particle_settling_in_drilling_fluids_Impact_of_fluid_rheology_and_particle_characteristics/24083682CC BY 4.0info:eu-repo/semantics/openAccessoai:figshare.com:article/240836822021-04-01T00:00:00Z |
| spellingShingle | CFD modeling of particle settling in drilling fluids: Impact of fluid rheology and particle characteristics Abdelrahman M. Awad (16932519) Engineering Fluid mechanics and thermal engineering Resources engineering and extractive metallurgy Particle settling Cuttings shape Drilling fluid Aspect ratio Drag coefficient Particle size distribution |
| status_str | publishedVersion |
| title | CFD modeling of particle settling in drilling fluids: Impact of fluid rheology and particle characteristics |
| title_full | CFD modeling of particle settling in drilling fluids: Impact of fluid rheology and particle characteristics |
| title_fullStr | CFD modeling of particle settling in drilling fluids: Impact of fluid rheology and particle characteristics |
| title_full_unstemmed | CFD modeling of particle settling in drilling fluids: Impact of fluid rheology and particle characteristics |
| title_short | CFD modeling of particle settling in drilling fluids: Impact of fluid rheology and particle characteristics |
| title_sort | CFD modeling of particle settling in drilling fluids: Impact of fluid rheology and particle characteristics |
| topic | Engineering Fluid mechanics and thermal engineering Resources engineering and extractive metallurgy Particle settling Cuttings shape Drilling fluid Aspect ratio Drag coefficient Particle size distribution |