Front dynamics of elliptical gravity currents on a uniform slope
In the present investigation, we report data from direct numerical simulations of elliptical, finite release, Boussinesq gravity currents propagating down a uniform slope. The study comprises a series of simulations of elliptical gravity currents on a range of slope angles. The shape parameters are...
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| مؤلفون آخرون: | , |
| التنسيق: | article |
| منشور في: |
2017
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| الوصول للمادة أونلاين: | http://hdl.handle.net/10725/11535 https://doi.org/10.1103/PhysRevFluids.2.064801 http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php https://journals.aps.org/prfluids/abstract/10.1103/PhysRevFluids.2.064801 |
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| _version_ | 1864513489205198848 |
|---|---|
| author | Zhu, S. J. |
| author2 | Zgheib, N. Balachandar, S. |
| author2_role | author author |
| author_facet | Zhu, S. J. Zgheib, N. Balachandar, S. |
| author_role | author |
| dc.creator.none.fl_str_mv | Zhu, S. J. Zgheib, N. Balachandar, S. |
| dc.date.none.fl_str_mv | 2017 2019-11-18T09:55:12Z 2019-11-18T09:55:12Z 2019-11-18 |
| dc.identifier.none.fl_str_mv | 2469-990X http://hdl.handle.net/10725/11535 https://doi.org/10.1103/PhysRevFluids.2.064801 Zhu, S. J., Zgheib, N., Balachandar, S., & Ooi, A. (2017). Front dynamics of elliptical gravity currents on a uniform slope. Physical Review Fluids, 2(6), 064801. http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php https://journals.aps.org/prfluids/abstract/10.1103/PhysRevFluids.2.064801 |
| dc.language.none.fl_str_mv | en |
| dc.relation.none.fl_str_mv | Physical Review Fluids |
| dc.rights.*.fl_str_mv | info:eu-repo/semantics/openAccess |
| dc.title.none.fl_str_mv | Front dynamics of elliptical gravity currents on a uniform slope |
| dc.type.none.fl_str_mv | Article info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
| description | In the present investigation, we report data from direct numerical simulations of elliptical, finite release, Boussinesq gravity currents propagating down a uniform slope. The study comprises a series of simulations of elliptical gravity currents on a range of slope angles. The shape parameters are varied to study the effects of the initial cross-sectional aspect ratio (Λ0) and mean height to lock radius ratio (Γ) on the dynamics of the gravity current. It is found that the long-time development of the current spatial mass distribution is influenced by its initial shape at smaller slope angles (θ=5∘ and 10∘) whereas the long-time motion of the gravity current is relatively insensitive to its initial shape but is sensitive to the slope angle. The switching of axes are observed for all the noncircular releases studied in the present work. Multiple acceleration phases are observed for the current center of mass in the case of the current with a small or moderate initial cross-sectional aspect ratio (Λ0=0.1, 0.2, 0.5, 1, and 2) whereas one single acceleration phase exists for the current with a large initial cross-sectional aspect ratio (Λ0=5 and 10). The Froude numbers (Fr) for the currents released with the same slope angle but different initial shapes are observed to attain a similar constant value after the second acceleration phase. The mean Froude number (Fr) is seen to increase with increasing slope angles. The mean height to lock radius ratio is found to affect only the early development of the current with little influence on the long-time evolution. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | LAURepo_a27daa25cf7a99daa0ab99e9b8b0b3a7 |
| identifier_str_mv | 2469-990X Zhu, S. J., Zgheib, N., Balachandar, S., & Ooi, A. (2017). Front dynamics of elliptical gravity currents on a uniform slope. Physical Review Fluids, 2(6), 064801. |
| language_invalid_str_mv | en |
| network_acronym_str | LAURepo |
| network_name_str | Lebanese American University repository |
| oai_identifier_str | oai:laur.lau.edu.lb:10725/11535 |
| publishDate | 2017 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| spelling | Front dynamics of elliptical gravity currents on a uniform slopeZhu, S. J.Zgheib, N.Balachandar, S.In the present investigation, we report data from direct numerical simulations of elliptical, finite release, Boussinesq gravity currents propagating down a uniform slope. The study comprises a series of simulations of elliptical gravity currents on a range of slope angles. The shape parameters are varied to study the effects of the initial cross-sectional aspect ratio (Λ0) and mean height to lock radius ratio (Γ) on the dynamics of the gravity current. It is found that the long-time development of the current spatial mass distribution is influenced by its initial shape at smaller slope angles (θ=5∘ and 10∘) whereas the long-time motion of the gravity current is relatively insensitive to its initial shape but is sensitive to the slope angle. The switching of axes are observed for all the noncircular releases studied in the present work. Multiple acceleration phases are observed for the current center of mass in the case of the current with a small or moderate initial cross-sectional aspect ratio (Λ0=0.1, 0.2, 0.5, 1, and 2) whereas one single acceleration phase exists for the current with a large initial cross-sectional aspect ratio (Λ0=5 and 10). The Froude numbers (Fr) for the currents released with the same slope angle but different initial shapes are observed to attain a similar constant value after the second acceleration phase. The mean Froude number (Fr) is seen to increase with increasing slope angles. The mean height to lock radius ratio is found to affect only the early development of the current with little influence on the long-time evolution.PublishedN/A2019-11-18T09:55:12Z2019-11-18T09:55:12Z20172019-11-18Articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article2469-990Xhttp://hdl.handle.net/10725/11535https://doi.org/10.1103/PhysRevFluids.2.064801Zhu, S. J., Zgheib, N., Balachandar, S., & Ooi, A. (2017). Front dynamics of elliptical gravity currents on a uniform slope. Physical Review Fluids, 2(6), 064801.http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.phphttps://journals.aps.org/prfluids/abstract/10.1103/PhysRevFluids.2.064801enPhysical Review Fluidsinfo:eu-repo/semantics/openAccessoai:laur.lau.edu.lb:10725/115352021-03-19T10:47:38Z |
| spellingShingle | Front dynamics of elliptical gravity currents on a uniform slope Zhu, S. J. |
| status_str | publishedVersion |
| title | Front dynamics of elliptical gravity currents on a uniform slope |
| title_full | Front dynamics of elliptical gravity currents on a uniform slope |
| title_fullStr | Front dynamics of elliptical gravity currents on a uniform slope |
| title_full_unstemmed | Front dynamics of elliptical gravity currents on a uniform slope |
| title_short | Front dynamics of elliptical gravity currents on a uniform slope |
| title_sort | Front dynamics of elliptical gravity currents on a uniform slope |
| url | http://hdl.handle.net/10725/11535 https://doi.org/10.1103/PhysRevFluids.2.064801 http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php https://journals.aps.org/prfluids/abstract/10.1103/PhysRevFluids.2.064801 |