| Titre : | Effect of transitions on flow past a square cylinder at low reynolds number |
| Auteurs : | Saha, Arun K., Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Journal of engineering mechanics (Vol. 135 N° 8, Août 2009) |
| Article en page(s) : | pp. 839-851 |
| Note générale : | Mécanique appliquée |
| Langues : | Anglais |
| Tags : | Three-dimensional flow Cylinders Wakes Flow simulation Vortex shedding Secondary Reynolds number. |
| Résumé : | Numerical simulations have been performed for three-dimensional flow past a square cylinder. The cylinders are placed normal to the incoming uniform flow. The results are based on higher order spatial and temporal discretization. The computations are carried out for a range of Reynolds number (100-325). The flow is found to be two-dimensional at R=160 while it becomes three-dimensional at R=163.5. Both Mode-A and Mode-A* are observed to be quite prominent and distinct at R=175 though they are present in a range of Reynolds number. The spanwise wavelength for Mode-A is higher than at R=250 where finer-scale structures are observed called Mode-B. The decay rate for primary vortices in Mode-A* is the fastest and it is the lowest for Mode-B. The magnitude of secondary vortices of Mode-A* is quite high compared to Mode-A, but of comparable magnitude to Mode-B. The effect of transitions on the instantaneous flow and root mean square fluctuations are quite significant while the time-averaged flow does not show any noticeable variation. |
| DEWEY : | 620.1 |
| ISSN : | 0733-9399 |
| En ligne : | http://ascelibrary.aip.org/vsearch/servlet/VerityServlet?KEY=JENMDT&smode=strresults&sort=chron&maxdisp=25&pjournals=JENMDT&pyears=2009&possible1zone=article&fromyear=2009&frommonth=Aug&toyear=2009&tomonth=Aug&fromvolume=135&tovolume=135&fromissue=8&toiss |
