Sun, W. ; Meng, X. ; Wang, Y. ; Hsiau, S. S. ; You, Z. (2023)
A Depth‐Averaged Description of Submarine Avalanche Flows and Induced Surface Waves.
In: Journal of Geophysical Research: Earth Surface, 2023, 128 (4)
doi: 10.26083/tuprints-00023726
Artikel, Zweitveröffentlichung, Verlagsversion
Kurzbeschreibung (Abstract)
This paper develops a depth‐averaged theory to investigate submarine landslides and resulting water waves. The problems here consist of a pure fluid regime and a mixture regime of grains and fluid. Both regimes separate from one another by an interface, which is a material surface for grains. While the downslope velocities of the both phases are assumed to be identical in the mixture regime, the velocity shear causes a rearrangement of grains, which induces a vertical relative motion between the phases. The established theory consists of five coupled conservation equations, which describe the evolution of the pure fluid thickness, the mixture thickness, the solids volume fraction, and depth‐averaged velocities. To handle nonconservative products emerging in the equations, a new coordinate system is introduced to rewrite the equation system in an equivalent form, so that numerical solutions are insensitive to the choice of discretization of nonconservative products, which enables us to accurately characterize the dynamic behaviors of particles in the collapse experiments of underwater particles and describe free‐surface wave profiles. It is shown that the computed results are in good agreement with the experiments reported in previous literatures.
| Typ des Eintrags: |
Artikel
|
| Erschienen: |
2023 |
| Autor(en): |
Sun, W. ; Meng, X. ; Wang, Y. ; Hsiau, S. S. ; You, Z. |
| Art des Eintrags: |
Zweitveröffentlichung |
| Titel: |
A Depth‐Averaged Description of Submarine Avalanche Flows and Induced Surface Waves |
| Sprache: |
Englisch |
| Publikationsjahr: |
24 November 2023 |
| Ort: |
Darmstadt |
| Publikationsdatum der Erstveröffentlichung: |
2023 |
| Ort der Erstveröffentlichung: |
Hoboken |
| Verlag: |
Wiley |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: |
Journal of Geophysical Research: Earth Surface |
| Jahrgang/Volume einer Zeitschrift: |
128 |
| (Heft-)Nummer: |
4 |
| Kollation: |
32 Seiten |
| DOI: |
10.26083/tuprints-00023726 |
| URL / URN: |
https://tuprints.ulb.tu-darmstadt.de/23726 |
| Zugehörige Links: |
|
| Herkunft: |
Zweitveröffentlichung DeepGreen |
| Kurzbeschreibung (Abstract): |
This paper develops a depth‐averaged theory to investigate submarine landslides and resulting water waves. The problems here consist of a pure fluid regime and a mixture regime of grains and fluid. Both regimes separate from one another by an interface, which is a material surface for grains. While the downslope velocities of the both phases are assumed to be identical in the mixture regime, the velocity shear causes a rearrangement of grains, which induces a vertical relative motion between the phases. The established theory consists of five coupled conservation equations, which describe the evolution of the pure fluid thickness, the mixture thickness, the solids volume fraction, and depth‐averaged velocities. To handle nonconservative products emerging in the equations, a new coordinate system is introduced to rewrite the equation system in an equivalent form, so that numerical solutions are insensitive to the choice of discretization of nonconservative products, which enables us to accurately characterize the dynamic behaviors of particles in the collapse experiments of underwater particles and describe free‐surface wave profiles. It is shown that the computed results are in good agreement with the experiments reported in previous literatures. |
|
Alternatives oder übersetztes Abstract: |
|
Alternatives Abstract | Sprache |
|---|
Developing an accurate and rigorous model to describe the motion of
submarine landslides and the evolution of the induced water wave remains a challenge to date. Existing models
usually simplify the submarine mass as a sling box or a deformable rheological material which is unable to
interpret certain fast-moving and some slow-moving granular flows that differ only in their compactness.
In this paper, the existing models are improved by taking account of the dilatancy effects of the particles.
Numerical results of underwater granular collapse show that the predictions of the temporal evolution of the
thickness profiles and the final deposit morphology using the current model are in better agreement with
experiments compared to the existing models. The present model also provides a better prediction in the wave
profiles induced by submarine landslides, which makes the present theory very promising to investigate natural
geophysical flows in the future | Englisch |
|
| Freie Schlagworte: |
submarine landslides, granular dilatancy, depth‐averaged theory, nonoscillatory central‐upwind scheme, free surface wave flow |
| ID-Nummer: |
e2022JF006893 |
| Status: |
Verlagsversion |
| URN: |
urn:nbn:de:tuda-tuprints-237263 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): |
600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau |
| Fachbereich(e)/-gebiet(e): |
16 Fachbereich Maschinenbau
16 Fachbereich Maschinenbau > Fachgebiet für Strömungsdynamik (fdy) |
| Hinterlegungsdatum: |
24 Nov 2023 14:02 |
| Letzte Änderung: |
27 Nov 2023 06:11 |
| PPN: |
|
| Zugehörige Links: |
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| Export: |
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| Suche nach Titel in: |
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A Depth‐Averaged Description of Submarine Avalanche Flows and Induced Surface Waves. (deposited 24 Nov 2023 14:02)
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