EXPERIMENTAL EXAMINATION OF LOCAL PROCESSES IN PACKED BEDS OF HOMOGENEOUS SPHERES. PART I: THE LOCAL PACKING IN RANDOMLY STACKED SPHERE BEDS. PART II: THE LOCAL HEAT TRANSFER OVER THE SURFACE AREA OF A SPHERE IMMERSED IN A PACKED BED OF INFINITE DIMENSIONS AND ARRANGED IN RHOMBOHEDRAL ARRAY

Technical Report · Mon Feb 01 04:00:00 EST 1960

OSTI ID:4077232

Wadsworth, J

The local packing, occurring in cylindrical containers when randomly stacked with homogeneous spheres, is examined over a range of 4 to 24 of the ratio of container diameter to sphere diameter. Sphere packings are examined both as a function of radial and vertical position in the bed. It is concluded that only one kind of close packing exists or tend to exist in random packing. i.e.. rhombohedral. Some understanding of the packing mechanism has evolved for the largest cylindrical container. i.e.. container to sphere diameter ratio of 24. A three-dimensional picture is presented of the heat transfer over the surface area of a sphere when immersed in a packed bed of ""infinite'' dimensions arranged in rhombohedral No. 6 blocked passage array for a range of Reynolds numbers of 8,000 to 60.000. where Reynolds number is based on sphere diameter, average velocity of the coolant across the cross-section of the bed in the absence of the spheres. and fluid properties evaluated at the mean film conditions. (auth)

• Research Organization: National Research Council of Canada. Div. of Mechanical Engineering, Ottawa
• NSA Number: NSA-15-006093
• OSTI ID: 4077232
• Report Number(s): MT-41; NRC-5895
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

COOLANTS
CROSS SECTIONS
CYLINDERS
ENGINEERING AND EQUIPMENT
ENRICHMENT
FILMS
FLUIDS
HEAT TRANSFER
SPHERES
SURFACES
VELOCITY