profiles of the horizontal flow under the thermocline were measured by a
three-component Doppler velocity profiler.
Internal waves with a pronounced spectral peak at the frequency close to the
maximum buoyancy frequency were detected in a wide range of the outflow
parameters (outflow velocity varied from 40 to 200 cm/s). Later, this effect was
observed in the numerical simulations by Ezhova et al. [20, 21] part 1, 2. Note, that
[10] measured internal waves in the experiments modelling discharge from submerged wastewater outfalls. This means that IW were generated by several identical
oscillating plumes not interacting or weakly interacting with each other (the distance between the nozzle outlets was approximately twice as large as the plume
diameter at the inflow of the jet to the pycnocline). Later in the works by Ezhova
et al. [20, 21], part 1, 2 the authors considered a single oscillating jet with the
similar parameters as a separate plume at the pycnocline, but did not reveal the
difference in the frequencies of generated IW (see Fig. 3 for the illustration of IW
and their spectra).
Fig. 2 Experimental setup in the LTST. [1] reservoir with alcohol solution (density 0.93 g/cm
3
),
[2] ultrasound three-component Doppler velocity profiler, the collector model (pipe with 5 holes of
3 mm diameter), [3] array of 13 thermistors. Depth H = 160 cm in the experiments with standard
stratification, H = 120 cm in the experiments with a shallow thermocline. In the experiments with
a shallow thermocline: [5] area of the measurements of surface velocities, [7] camera
70
V. G. Bondur et al.
three-component Doppler velocity profiler.
Internal waves with a pronounced spectral peak at the frequency close to the
maximum buoyancy frequency were detected in a wide range of the outflow
parameters (outflow velocity varied from 40 to 200 cm/s). Later, this effect was
observed in the numerical simulations by Ezhova et al. [20, 21] part 1, 2. Note, that
[10] measured internal waves in the experiments modelling discharge from submerged wastewater outfalls. This means that IW were generated by several identical
oscillating plumes not interacting or weakly interacting with each other (the distance between the nozzle outlets was approximately twice as large as the plume
diameter at the inflow of the jet to the pycnocline). Later in the works by Ezhova
et al. [20, 21], part 1, 2 the authors considered a single oscillating jet with the
similar parameters as a separate plume at the pycnocline, but did not reveal the
difference in the frequencies of generated IW (see Fig. 3 for the illustration of IW
and their spectra).
Fig. 2 Experimental setup in the LTST. [1] reservoir with alcohol solution (density 0.93 g/cm
3
),
[2] ultrasound three-component Doppler velocity profiler, the collector model (pipe with 5 holes of
3 mm diameter), [3] array of 13 thermistors. Depth H = 160 cm in the experiments with standard
stratification, H = 120 cm in the experiments with a shallow thermocline. In the experiments with
a shallow thermocline: [5] area of the measurements of surface velocities, [7] camera
70
V. G. Bondur et al.