Deep sea air-lifting of solid particles from depth of 1600 m is simulated with a mathematical model of the three-phase flow in an upward pipe. The computations are carried out for an axisymmetric domain in a transient way. Phase distributions, pressure and velocity profiles together with flow rates for all phases are presented and analysed. The influence of the pipe diameter on the air-lift efficiency was studied for air-lift pipes of different lengths and found to be significant. The lifting efficiency increases with the increase of the pipe diameter due to the reduction of the wall friction influence on the flow. In addition, the efficiency also increases with the increase of the solid particles volume fraction at the inlet. The presented numerical model can be utilized during various stages of the design of the air-lift pumps to help answer fundamental questions on the process, and during their operation to select optimal process parameters and to address possible problems.
Numerical modelling of deep sea air-lift
Numerische Programmierung des Lufthebeverfahrens aus der Tiefsee
Ocean Engineering ; 35 , 11-12 ; 1173-1182
2008
10 Seiten, 20 Quellen
Aufsatz (Zeitschrift)
Englisch
NUMERICAL SIMULATION AND MODELLING OF HIGH-LIFT AERODYNAMICS IN GROUND-EFFECT
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