TY - JOUR
T1 - Vortical Flow Structure in the Wake of an Estate Car
AU - Phillip Gwo-Yan Huang & Tony Wen-Hann Sheu
JO - Communications in Computational Physics
VL - 4
SP - 881
EP - 900
PY - 2018
DA - 2018/04
SN - 18
DO - http://doi.org/10.4208/cicp.271114.250515s
UR - https://global-sci.org/intro/article_detail/cicp/11054.html
KW - 
AB - <p style="text-align: justify;">A finite volume simulation of unsteady vortical wake flow behind a square-back
estate car is presented. The three-dimensional time-averaged incompressible
Navier-Stokes equations are solved together with the Reynolds stress transport equations
for turbulence. By virtue of the simulated surface streamlines, the physics of
fluid can be extracted using the topological theory. In addition, the simulated topological
singular points and lines of separation are plotted on the car surface. The vortical
flow motions that developed behind the mirrors, wheels and car body are explored by
means of the simulated time evolving vortex corelines. The formation and interaction
of the vortex systems in the wake are examined by tracing the instantaneous streamlines
in the vicinity of the simulated vortex corelines. The vortex street behind the
estate car is also illustrated by the simulated streaklines. Finally the Hopf bifurcation
phenomenon is revealed by the time-varying aerodynamic forces on the car.</p>