Numerical modeling of the wind flow over a transverse dune
| LEADER | caa a22 4500 | ||
|---|---|---|---|
| 001 | 528785435 | ||
| 005 | 20181217030312.0 | ||
| 007 | cr unu---uuuuu | ||
| 008 | 180924e20131004xx s 000 0 eng | ||
| 024 | 7 | 0 | |a 10.3929/ethz-b-000073465 |2 doi |
| 024 | 7 | 0 | |a 10.1038/srep02858 |2 doi |
| 035 | |a (ETHRESEARCH)oai:www.research-collecti.ethz.ch:20.500.11850/73465 | ||
| 245 | 0 | 0 | |a Numerical modeling of the wind flow over a transverse dune |h [Elektronische Daten] |c [Ascânio D. Araújo, Eric J.R. Parteli, Thorsten Pöschel, José E. Andrade, Hans J. Herrmann] |
| 246 | 0 | |a Sci Rep | |
| 506 | |a Open access |2 ethresearch | ||
| 520 | 3 | |a Transverse dunes, which form under unidirectional winds and have fixed profile in the direction perpendicular to the wind, occur on all celestial objects of our solar system where dunes have been detected. Here we perform a numerical study of the average turbulent wind flow over a transverse dune by means of computational fluid dynamics simulations. We find that the length of the zone of recirculating flow at the dune lee — the separation bubble — displays a surprisingly strong dependence on the wind shear velocity, u*: it is nearly independent of u* for shear velocities within the range between 0.2 m/s and 0.8 m/s but increases linearly with u* for larger shear velocities. Our calculations show that transport in the direction opposite to dune migration within the separation bubble can be sustained if u* is larger than approximately 0.39 m/s, whereas a larger value of u* (about 0.49 m/s) is required to initiate this reverse transport. | |
| 540 | |a Creative Commons Attribution 3.0 Unported |u http://creativecommons.org/licenses/by/3.0 |2 ethresearch | ||
| 690 | 7 | |a Nonlinear phenomena |2 ethresearch | |
| 690 | 7 | |a Fluid dynamics |2 ethresearch | |
| 700 | 1 | |a Araújo |D Ascânio D. |e joint author | |
| 700 | 1 | |a Parteli |D Eric J.R. |e joint author | |
| 700 | 1 | |a Pöschel |D Thorsten |e joint author | |
| 700 | 1 | |a Andrade |D José E. |e joint author | |
| 700 | 1 | |a Herrmann |D Hans J. |e joint author | |
| 773 | 0 | |t Scientific Reports |d London : Nature Publishing Group |g 3, p. 2858 |x 2045-2322 | |
| 856 | 4 | 0 | |u http://hdl.handle.net/20.500.11850/73465 |q text/html |z WWW-Backlink auf das Repository (Open access) |
| 908 | |D 1 |a Journal Article |2 ethresearch | ||
| 950 | |B ETHRESEARCH |P 856 |E 40 |u http://hdl.handle.net/20.500.11850/73465 |q text/html |z WWW-Backlink auf das Repository (Open access) | ||
| 950 | |B ETHRESEARCH |P 700 |E 1- |a Araújo |D Ascânio D. |e joint author | ||
| 950 | |B ETHRESEARCH |P 700 |E 1- |a Parteli |D Eric J.R. |e joint author | ||
| 950 | |B ETHRESEARCH |P 700 |E 1- |a Pöschel |D Thorsten |e joint author | ||
| 950 | |B ETHRESEARCH |P 700 |E 1- |a Andrade |D José E. |e joint author | ||
| 950 | |B ETHRESEARCH |P 700 |E 1- |a Herrmann |D Hans J. |e joint author | ||
| 950 | |B ETHRESEARCH |P 773 |E 0- |t Scientific Reports |d London : Nature Publishing Group |g 3, p. 2858 |x 2045-2322 | ||
| 898 | |a BK010053 |b XK010053 |c XK010000 | ||
| 949 | |B ETHRESEARCH |F ETHRESEARCH |b ETHRESEARCH |j Journal Article |c Open access | ||