Slope dependence of self-similar structure and entrainment in gravity currents
Results from seven direct and large-eddy simulations of gravity currents on slopes ranging from 0.14$^{\circ }$ to 2.86$^{\circ }$ that span from the subcritical to the supercritical regime are studied. By considering a long domain, attention is focused on the near-self-similar state approached by t...
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| Veröffentlicht in: | Journal of fluid mechanics 2022-03, Vol.934, Article R4 |
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| container_title | Journal of fluid mechanics |
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| creator | Salinas, Jorge S. Zúñiga, Santiago Cantero, M.I. Shringarpure, M. Fedele, J. Hoyal, D. Balachandar, S. |
| description | Results from seven direct and large-eddy simulations of gravity currents on slopes ranging from 0.14$^{\circ }$ to 2.86$^{\circ }$ that span from the subcritical to the supercritical regime are studied. By considering a long domain, attention is focused on the near-self-similar state approached by these currents far downstream. In the self-similar limit, the various shape factors, local Richardson number, entrainment coefficient, velocity scale and basal drag coefficient reach a constant value, while the current height, volume and momentum fluxes continue to increase linearly. Their dependence on slope is presented. |
| doi_str_mv | 10.1017/jfm.2022.1 |
| format | Article |
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Fluid Mech</addtitle><date>2022-03-10</date><risdate>2022</risdate><volume>934</volume><artnum>R4</artnum><issn>0022-1120</issn><eissn>1469-7645</eissn><abstract>Results from seven direct and large-eddy simulations of gravity currents on slopes ranging from 0.14$^{\circ }$ to 2.86$^{\circ }$ that span from the subcritical to the supercritical regime are studied. By considering a long domain, attention is focused on the near-self-similar state approached by these currents far downstream. In the self-similar limit, the various shape factors, local Richardson number, entrainment coefficient, velocity scale and basal drag coefficient reach a constant value, while the current height, volume and momentum fluxes continue to increase linearly. 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| source | Cambridge University Press Journals Complete |
| subjects | Drag coefficient Drag coefficients Eddy currents Entrainment Flow velocity Fluid mechanics Gravity JFM Rapids Large eddy simulation Momentum Oceanic eddies Richardson number Salinity Self-similarity Simulation |
| title | Slope dependence of self-similar structure and entrainment in gravity currents |
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