Ak. Saxena et al., LIQUID-PHASE RESIDENCE TIME DISTRIBUTION FOR 2 PHASE FLOW IN COILED TUBES, Canadian journal of chemical engineering, 74(6), 1996, pp. 861-866
The residence time distribution (RTD) of the liquid phase in air-water
flow through helical coils has been studied. Upward and downward cocu
rrent flows have been investigated in three coils with curvature ratio
s ranging from 11 to 60.7. The ranges of the Reynolds numbers for the
gas and the liquid varied from 1500 to 3000 and 620 to 3200, respectiv
ely. A model has been proposed that describes the liquid phase RTD as
combination of two different residence time distributions applicable f
or turbulent and laminar liquid flows.