| Titre : | Numerical simulation of shallow-water flow using a modified cartesian cut-cell approach |
| Auteurs : | Hyung-Jun Kim, Auteur ; Lee, Jin Woo, Auteur ; Yong-Sik Cho, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Journal of engineering mechanics (Vol. 136 N° 3, Mars 2010) |
| Article en page(s) : | pp. 399-404 |
| Note générale : | Mécanique appliquée |
| Langues : | Anglais |
| Tags : | Dam failures Shallow water Water flow Simulation. |
| Résumé : | The Cartesian cut-cell method can be used to represent irregular and complex computational domains with less computational efforts by cutting the grid cells on the boundary surfaces in a background uniform Cartesian mesh. In this study, a modified Cartesian cut-cell grid technique is proposed to better represent complex physical geometries. A point shifting treatment was employed to determine the start and end points of a line segment in cut-cell grids. This led to an improved representation of sharply-shaped corners in surface polygons. Numerical simulation to solve a set of shallow-water equations was performed by incorporating a finite volume approach into the Cartesian cut-cell mesh. The advective fluxes at intercells were first estimated by a Harten, Lax and van Leer for contact wave approximate Riemann solver. In order to improve the model accuracy to the second order, a total variation diminishing-weighted average flux method was applied to work adaptively with the cut-cell mesh. The numerical model was then employed to simulate dam-break flow propagation in a small channel with a rectangular obstacle or a 45° bend. The numerical results show good agreement with available laboratory measurements. |
| DEWEY : | 620.1 |
| ISSN : | 0733-9399 |
| En ligne : | http://ascelibrary.aip.org/vsearch/servlet/VerityServlet?KEY=JENMDT&ONLINE=YES&smode=strresults&sort=journ&maxdisp=25&pjournals=JENMDT&possible1zone=article&fromyear=2010&frommonth=Mar&toyear=2010&tomonth=Mar&fromvolume=136&tovolume=136&fromissue=3&toissu |
