Simulations of hydraulic jumps

This simulation was inspired by Durran (1986, J. Atmos. Sci.), and was made with the ARPS model. The simulation has the following properties:

This combination of environmental parameters results in a propagating hydraulic jump which forms on the lee (right) side of the mountain and progresses downstream with time. The figures below depict the situation at 12000 sec (3.33 hr) after simulation start.

Clicking on an image opens an animation of the field in a new window.

Figure 1: The potential temperature field.

Potential temperature field

Figure 2: The perturbation horizontal velocity field (the mean initial wind of 20 m/s has been subtracted out).

Horizontal wind perturbation field

Figure 3: The potential temperature field (now colored) with the vertical velocity contoured (dashed contours are downdrafts).

Horizontal wind perturbation field

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Page created January, 2001, by Robert Fovell