1. Flow behaviour of negatively buoyant jets in immiscible ambient fluid.
- Author
-
Geyer, A., Phillips, J., Mier-Torrecilla, M., Idelsohn, S., and Oñate, E.
- Subjects
- *
BUOYANT ascent (Hydrodynamics) , *FRESH water , *FLUIDS , *NOZZLES , *SPEED - Abstract
In this paper we investigate experimentally the injection of a negatively buoyant jet into a homogenous immiscible ambient fluid. Experiments are carried out by injecting a jet of dyed fresh water through a nozzle in the base of a cylindrical tank containing rapeseed oil. The fountain inlet flow rate and nozzle diameter were varied to cover a wide range of Richardson Ri (8 × 10 < Ri < 1.98), Reynolds Re (467 < Re < 5,928) and Weber We (2.40 < We < 308.56) numbers. Based on the Re, Ri and We values for the experiments, we have determined a regime map to define how these values may control the occurrence of the observed flow types. Whereas Ri plays a stronger role when determining the maximum penetration height, the effect of the Reynolds number is stronger predicting the flow behaviour for a specific nozzle diameter and injection velocity. [ABSTRACT FROM AUTHOR]
- Published
- 2012
- Full Text
- View/download PDF