The flow near a rotating disk of finite radius which forms the top of a right circular cylinder is considered. Limited numerical solutions are presented for a slow rotational rate. However, emphasis is given to large rotational Reynolds numbers where most experiments with rotating disks are carried
Flow and mass transfer near an enclosed rotating disk: Experiment
β Scribed by G.D. Lehmkuhl; J.L. Hudson
- Publisher
- Elsevier Science
- Year
- 1971
- Tongue
- English
- Weight
- 703 KB
- Volume
- 26
- Category
- Article
- ISSN
- 0009-2509
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β¦ Synopsis
The flow near a disk rotating in a cylinder of water was studied by using dye tracers and by taking time exposure photographs of neutrally buoyant beads. The rotational Reynolds number was large so that boundary layers formed on all surfaces. The rate of dissolution of cinnamic acid from the disk face was measured in order to determine the effect of the enclosure on mass transfer. There is no effect of the ratio of cylinder radius to disk radius on mass transfer within experimental accuracy; there is no effect of cylinder height for Ren > 50 (approximately) where Ren is the rotational Reynolds number based on the axial distance from the disk to the cylinder bottom. A mass transfer analysis is presented.
π SIMILAR VOLUMES
The fluid flow due to a rotating disk against an external forced flow is solved by the method of orthogonal collocation. Polynomials with a weighting factor of e -(llr', which are orthogonal to each other in (0, co ), are chosen as the basis functions for this semi-infinite boundary problem. The flo