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