Author/Authors :
Chitsaz Boroujerdi, H. Department of Oceanography - Graduate School of Marine Science and Technology - Science and Research Branch, Islamic Azad University, Tehran, Iran , Bidokhti, A. A. Institute of Geophysics - Tehran University, Tehran, Iran , Sharafatmandjoor, Sh. Department of Mechanical and Aerospace Engineering - Science and Research Branch, Islamic Azad University, Tehran, Iran
Abstract :
In order to present a quantitative indicator for the onset of instability, in this paper, the critical points
of a stratified gravitational flow on a slope are found and analyzed. These points are obtained by means of the
solution of the two-dimensional Navier-Stokes equations via the standard Arakawa-C finite-difference method.
Results show that in the marginal Richardson numbers, the critical points begin to originate. Also, the cyclic
evolution in the temporal differenced density field in the vicinity of the critical points is used as a quantitative
criterion of the onset of mixing. Therefore, it is possible to predict the beginning of the mixing phenomenon via
analysis of only a limited number of critical points.
Keywords :
Gravitational Flow , Critical Points , Curvature Field , Instability
