- Title
- On the Batchelor constant in decaying isotropic turbulence
- Creator
- Antonia, R. A.; Orlandi, P.
- Relation
- Physics of Fluids Vol. 15, Issue 7, p. 2084-2086
- Publisher Link
- http://dx.doi.org/10.1063/1.1577346
- Publisher
- American Institute of Physics
- Resource Type
- journal article
- Date
- 2003
- Description
- Direct numerical simulations of a passive scalar mixed in decaying homogeneous isotropic turbulence indicate that, when the Schmidt number is close to or exceeds unity, the Batchelor constant is about 3. This is smaller by nearly a factor of 2 than that inferred from stationary turbulence simulations. In the present case, Batchelor's spectrum approximates the present data well in the viscous-convective range while Kraichnan's spectrum provides a very good fit at large wavenumbers.
- Subject
- turbulence; flow simulation; fluid dynamics; spectrum analysis; Batchelor constant
- Identifier
- http://hdl.handle.net/1959.13/33296
- Identifier
- uon:3134
- Identifier
- ISSN:1070-6631
- Rights
- Copyright of Physics of Fluids is the property of American Institute of Physics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.
- Language
- eng
- Full Text
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