82
3 Basics of Nonhydrostatic Modelling
3.22.3 Results
As expected, the dense bottom layer gradually accelerates on the sloping bottom
(Fig. 3.49). This creates a vertical shear flow. The shear flow becomes subject to
the Kelvin-Helmholtz instability process (see Sect. 3.10). Dynamical disturbances
appear after 70 min of simulation and create counter-clockwise rotating vortices. At
this stage, the near-bottom flow has reached speeds of 80 cm/s.
Fig. 3.49 Exercise 13: Density distributions (color shading and contours) at selected times of the
simulation. Red shading refers to the densest water
3 Basics of Nonhydrostatic Modelling
3.22.3 Results
As expected, the dense bottom layer gradually accelerates on the sloping bottom
(Fig. 3.49). This creates a vertical shear flow. The shear flow becomes subject to
the Kelvin-Helmholtz instability process (see Sect. 3.10). Dynamical disturbances
appear after 70 min of simulation and create counter-clockwise rotating vortices. At
this stage, the near-bottom flow has reached speeds of 80 cm/s.
Fig. 3.49 Exercise 13: Density distributions (color shading and contours) at selected times of the
simulation. Red shading refers to the densest water