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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Special sessions : Experiments on plane negatively buoyant jets
Experiments on plane negatively buoyant jets
Dense effluents, such as desalination brines, are commonly discharged inclined upwards and form negatively buoyant
jets (NBJ). In this paper, we report experiments on plane NBJ performed in a laboratory tank. The jets were discharged
from a slot 20 cm long and 2 mm wide, placed at angles to the horizontal 0 = 0o and 45o. The densimetric Froude
number was in the range F0= 15 ~ 38 and the Reynolds Re0 = 1200 ~ 3200. The trajectory was measured by analysis of
video recordings, whereas axial concentrations were determined by extracting small volumes of liquid, using a thin
needle adapted on a flexible pipe of small diameter. The results are presented in dimensionless form and compared with
existing data in the literature for 0 = 0o, whereas for 0 = 45o useful observations are made for the normalized terminal
height of rise and the normalized distance to the return point compared to round NBJ. For both discharge angles, the
results are found to agree reasonably well with model predictions.
File Size : 918,057 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Special sessions
Date Published : 18/08/2015
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