118
5 2D Shallow-Water Modelling
Fig. 5.20 Exercise 14. Same as Fig. 5.19, but for Case 2 (Re = 300) and after 1.5 days of simulation
and produces a return f ow toward the island and an associated counter-rotating
vortex pair. With a further intensificatio of the fl w incident on the island, the vortex pair becomes unstable owing to nonlinear effects. This creates fl w meadering
and the formation of a vortex street. The role of lateral momentum diffusion in this
process is the suppression of fl w disturbances which fails when the ambient fl w
exceeds a certain threshold speed.
5.10.9 Additional Exercises for the Reader
Explore changes in the dynamics when using either the semi-slip or the full-slip
condition. Experiment with different island shapes and sizes. Place two or more
islands in the model domain to study interference patterns of adjacent turbulent
wakes.
5 2D Shallow-Water Modelling
Fig. 5.20 Exercise 14. Same as Fig. 5.19, but for Case 2 (Re = 300) and after 1.5 days of simulation
and produces a return f ow toward the island and an associated counter-rotating
vortex pair. With a further intensificatio of the fl w incident on the island, the vortex pair becomes unstable owing to nonlinear effects. This creates fl w meadering
and the formation of a vortex street. The role of lateral momentum diffusion in this
process is the suppression of fl w disturbances which fails when the ambient fl w
exceeds a certain threshold speed.
5.10.9 Additional Exercises for the Reader
Explore changes in the dynamics when using either the semi-slip or the full-slip
condition. Experiment with different island shapes and sizes. Place two or more
islands in the model domain to study interference patterns of adjacent turbulent
wakes.