Floor motion's influence on wake asymmetry of a notchback bluff body
Journal article, 2022

Large eddy simulations are used to explore the influence of floor motions on asymmetric flows around a notchback bluff body. The focus of this study is on the aerodynamic forces and the extent of natural wake asymmetry presented under moving and stationary ground conditions. The different ground condition has a notable influence on the aerodynamic force and the surrounding pressure distribution of the body. On the other hand, the wake asymmetry, known to be a sensitive phenomenon, is not evidently affected by the floor motion. However, quantitative analysis of the averaged and the statistic flow still suggests slight differences in the degree of wake asymmetry between the two ground conditions. Modal analysis applying proper orthogonal decomposition confirms that the asymmetric wake dynamics and the wake shedding frequency are not sensitive to the floor motion. The accuracy of the numerical simulation is established by a grid-independence study.

Author

Kan He

Chalmers, Mechanics and Maritime Sciences (M2), Fluid Dynamics

Central South University

Guglielmo Minelli

Volvo Cars

Xinchao Su

Chalmers, Mechanics and Maritime Sciences (M2), Fluid Dynamics

Jiabin Wang

Chalmers, Mechanics and Maritime Sciences (M2), Fluid Dynamics

Guangjun Gao

Central South University

Sinisa Krajnovic

Chalmers, Mechanics and Maritime Sciences (M2), Fluid Dynamics

Physics of Fluids

1070-6631 (ISSN) 1089-7666 (eISSN)

Vol. 34 3 035103

Subject Categories

Applied Mechanics

Vehicle Engineering

Fluid Mechanics and Acoustics

DOI

10.1063/5.0084435

More information

Latest update

3/21/2022