| Author | Chakri Chatuthasry |
| Call Number | AIT Thesis no. 7 |
| Subject(s) | Sedimentation analysis
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in the SEATO Graduate School of Engineering, Bangkok, Thailand. |
| Publisher | Asian Institute of Technology |
| Abstract | Sedimentation Diameter as a function of Reynolds Number
The objective of this thesis is to determine how the sedimentation diameter of particles varies with Reynolds number and how this relationship is affected by the shape of the particles. The sedimentation diameter of a particle is defined as the diameter of a sphere of the same specific gravity and of the same terminal settling velocity as a given particle in the sedimentation fluid. This parameter has been suggested as a way of characterizing the pertinent hydraulic property of sedimentary particles. The purpose of this study is to discover to what extent the sedimentation diameter is a unique property of individual particles and to what extent it might depend on the conditions under which it is determined.
The sedimentation diameter of 10 quartz and 10 calcite particles were found by measuring their fall velocities in distilled water and in three glycerine solutions of varying water content, the most viscous having a viscosity of about five poises. The range of Reynolds number was from about 0.1 to 2,000. The shape of each particle was characterized by a ratio c / √(ab), where a, b, and c represent the lengths of three mutually perpendicular axes of the particle. a being the longest and c the shortest axis.
It was found that the sedimentation diameters of particular particles (of shapes other than spherical) tend to decrease at Reynolds numbers greater than about 10, and that this decrease is greater the more the particles deviate in shape from spheres. |
| Year | 1961 |
| Type | Thesis |
| School | Student Research Before 1979 |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Thesis (Year <=1979) |
| Degree | Thesis (M.Eng.) - SEATO Graduate School of Engineering, 1961 |