  This work is concerned with the numerical investigation of the dynamics of
stopping vortex formation in the uniform flow past a wedge mounted on a wall
for channel Reynolds number $Re_c=1560$. The streamfunction-vorticity
($\psi$-$\omega$) formulation of the transient Navier-Stokes (N-S) equations
have been utilized for simulating the flow and has been discretized using a
fourth order spatially and second order temporally accurate compact finite
difference method on a nonuniform Cartesian grid developed by the author. The
results are validated by comparing the simulated results of the early evolution
of the flow with the experimental visualization of a well-known laboratory
experiment of \cite{pullin1980} and a grid-independence study. The development
of the stopping vortex and its effect on the starting vortex are discussed in
details. The stopping flow is analysed in the light of the time interval
through which the inlet velocity of the flow is decelerated. The criterion for
the development of a clean vortex is provided in terms of the impulse
associated with the deceleration. Our study revealed that the strength of the
stopping vortex depends upon the rapidity of deceleration. The vorticity
distribution along the diameter of the core of the stopping vortex is seen to
follow a Gaussian profile.
