BI-STABLE STATES IN THE WAKE OF A SIMPLIFIED GROUND TRANSPORTATION SYSTEM (GTS) MODEL
Conference contribution, 2017

Recent experimental investigations of [1] in the wake of a Ground Transportation System (GTS) model has shown that the near wake topology is invariant over a large range of Reynolds numbers. A large eddy simulation (LES) is thus undertaken to investigate the flow topology in the near wake. In the vertical midplane behind the model, a flow state which is anti-symmetric to that reported in [1] is observed here, confirming the possibility of occurrence of bi-stable flow. Interestingly, the flow topology remains invariant to any increase in the gap height from the standard case, indicating that the underbody flow does not influence the bistable behaviour. Furthermore, the flow was also found to be insensitive to the incoming flow at a small yaw angle.

Author

Anirudh Narayan Rao

Chalmers, Applied Mechanics, Fluid Dynamics

Jie Zhang

Chalmers, Applied Mechanics, Fluid Dynamics

Guglielmo Minelli

Chalmers, Applied Mechanics, Fluid Dynamics

Branislav Basara

Chalmers, Applied Mechanics, Fluid Dynamics

Sinisa Krajnovic

Chalmers, Applied Mechanics, Fluid Dynamics

Subject Categories

Mechanical Engineering

Infrastructure

C3SE (Chalmers Centre for Computational Science and Engineering)

More information

Latest update

1/29/2018