STUDIES OF SMALL PARTICLE SUSPENSIONS FOR L.M.F.R. PART I. FLUID FLOW WITH SUSPENSIONS SIMULATING THE U-Na SYSTEM

Technical Report · Thu Aug 01 04:00:00 EDT 1957

OSTI ID:4243895

Cairns, R C; Turner, K S

Velocities of 2.5 to 2.9 feet per second are needed to prevent settling of tungsten powder in a 1-in. i.d. horizontal pipe from aqueous suspensions containing 6.1 to 7.0 percent by weight of tungsten. In one instanoe a narrow moving bed was observed at a velocity of 3.8 feet per second for a suspension containing 5.0 percent of tungsten but the formation of a moving bed was not reproducible. Settling has been observed at Reynolds numbers as high as 36,300. The equation of Dallavalle, suitably modified, predicts settling velocities in a horizontal pipe of the same order as those found experimentally for dense solid, micron-sizad particle suspensions. For fully suspended flow the friction factors lie approximately 10 percent above the smooth tube, normal liquid curve. It was not found necessary to consider non-Newtonian relationships to correlate the pressure drop data. At mean Reynolds numbers above approximately 35,000 streamlines'' were observed in the lower half of the pipe for fully suspended flow. These phenomena are discussed, but a full quantitative theoretical explanation is needed together with further experimental work. (auth)

• Research Organization: Australia. Atomic Energy Commission Research Establishment, Lucas Heights, New South Wales
• NSA Number: NSA-13-012087
• OSTI ID: 4243895
• Report Number(s): AAEC/E-5
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CONFIGURATION
DENSITY
EQUATIONS
FLUID FLOW
FLUIDIZATION
FRICTION
GRAIN SIZE
LIQUID METAL FUEL
LIQUIDS
MEASURED VALUES
PARTICLES
PHYSICS AND MATHEMATICS
PIPES
POWDERS
PRESSURE
REACTORS
REYNOLDS NUMBER
SODIUM
SOLIDS
SUSPENSIONS
TUBES
TUNGSTEN
TURBULENCE
URANIUM
VELOCITY
WATER