Abstract
Multi‐point hot‐wire measurements in grid turbulence have been used to conditionally average the dissipation over inertial‐scale features of the turbulent field. Velocities were measured at 5 separate spatial points obtaining six simultaneous velocity components, at turbulent Rey‐ nolds numbers Reλ of 160 and 230. The dissipation was approximated with pseudo‐ or surro‐ gate dissipation εr ′ based on one or two velocity gradients. The conditioned dissipation εr ′ inside the most intense large‐scale rotational regions of the flow is more than twice as large as the expected value of εr ′ over the whole domain. Conditional averaging was also carried out over strong large‐scale fronts showing smaller excess in dissipation.
Original language | English (US) |
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Pages (from-to) | 1333-1335 |
Number of pages | 3 |
Journal | Physics of Fluids |
Volume | 8 |
Issue number | 5 |
DOIs | |
State | Published - May 1996 |
Externally published | Yes |
Keywords
- ENERGY LOSSES
- HOT WIRE ANEMOMETERS
- REYNOLDS NUMBER
- TURBULENT FLOW
- VISCOUS FLOW
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Fluid Flow and Transfer Processes
- Computational Mechanics