Accession Number:

AD0680455

Title:

SPHEROIDAL PARTICLE FLOW IN A CYLINDRICAL TUBE.

Descriptive Note:

Technical rept.,

Corporate Author:

COLUMBIA UNIV NEW YORK DEPT OF CIVIL ENGINEERING AND ENGINEERING MECHANICS

Personal Author(s):

Report Date:

1968-11-01

Pagination or Media Count:

104.0

Abstract:

Viscous flow in a circular cylindrical tube containing an infinite line of rigid spheroidal particles equally spaced along the axis of the tube is considered for a uniform axial translation of the spheroids b flow past a line of stationary spheroids and c flow of the suspending fluid and spheroids under an imposed pressure gradient. The fluid is assumed to incompressible and Newtonian. The Reynolds number is assumed to be small and the equations of creeping flow are used. Two types of solutions are developed for each case i an exact solution in the form of infinite series which is valid for ratios of the spheroid diameter to the tube diameter up to 0.80. ii an approximate solution using lubrication theory which is valid for spheroids which nearly fill the tube. The drag on each spheroid and the pressure drop are computed for all cases. Both prolate and oblate spheroids are considered. The results show that the drag and pressure drop depend on the spheroidal diameter perpendicular to the axis of tube primarily and the effects of the spheroidal thickness and spacing are secondary. The results are of interest in connection with mechanics of capillary blood flow, sedimentation, fluidized beds, and fluid-solid transport. Author

Subject Categories:

  • Anatomy and Physiology
  • Industrial Chemistry and Chemical Processing
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE