Large Scale Flow Generation in Turbulent Convection.
Abstract
In a horizontal layer of the fluid heated below and cooled above, cellular convection with horizontal length scale comparable to the layer depth occurs for small enough values of the Rayleigh number. As the Rayleigh number is increased, cellular flow disappears and is replaced by a random array of transient plumes. Upon further increase, these plumes drift in one direction near the bottom, in the opposite direction near the top of momentum is transported upwards via the Reynolds stress. With the onset of this large scale flow, the largest scale of motion has increased from that comparable to the layer depth to a scale comparable to the layer width. The conditions for occurrence and determination of the direction of this large scale circulation are described. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1980
- Accession Number
- ADA096453
Entities
People
- Louis N. Howard
- Ruby Krishnamurti
Organizations
- Florida State University