The incompressible high Reynolds number flow around the rectangular cylinder with aspect ratio 5: 1 has been extensively studied in the recent literature and became a standard benchmark in the field of bluff bodies aerodynamics. The majority of the proposed contributions focus on the simulation of the flow when a smooth inlet condition is adopted. Nevertheless, even when nominally smooth conditions are reproduced in wind tunnel tests, a low turbulence intensity is present together with environmental disturbances and model imperfections. Additionally, many turbulence models are known to be excessively dissipative in laminar-to-turbulent transition zones, generally leading to overestimation of the reattachment length. In this paper, Large Eddy Simulations are performed on a 5: 1 rectangular cylinder at non-null-attack angle aiming at studying the sensitivity of such flow to a low level of incoming disturbances and compare the performance of standard Smagorinsky-Lilly and Kinetic Energy Transport turbulence models.
Effects of low incoming turbulence on the flow around a 5:1 rectangular cylinder at non-null-attack angle / Ricci, M.; Patruno, L; De Miranda, S.; Ubertini, F.. - In: MATHEMATICAL PROBLEMS IN ENGINEERING. - ISSN 1024-123X. - STAMPA. - 2016:(2016), pp. 2302340.1-2302340.12. [10.1155/2016/2302340]
Effects of low incoming turbulence on the flow around a 5:1 rectangular cylinder at non-null-attack angle
RICCI, MATTIA;PATRUNO, LUCA;DE MIRANDA, STEFANO;UBERTINI, FRANCESCO
2016
Abstract
The incompressible high Reynolds number flow around the rectangular cylinder with aspect ratio 5: 1 has been extensively studied in the recent literature and became a standard benchmark in the field of bluff bodies aerodynamics. The majority of the proposed contributions focus on the simulation of the flow when a smooth inlet condition is adopted. Nevertheless, even when nominally smooth conditions are reproduced in wind tunnel tests, a low turbulence intensity is present together with environmental disturbances and model imperfections. Additionally, many turbulence models are known to be excessively dissipative in laminar-to-turbulent transition zones, generally leading to overestimation of the reattachment length. In this paper, Large Eddy Simulations are performed on a 5: 1 rectangular cylinder at non-null-attack angle aiming at studying the sensitivity of such flow to a low level of incoming disturbances and compare the performance of standard Smagorinsky-Lilly and Kinetic Energy Transport turbulence models.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.