251 research outputs found
Kraichnan-Leith-Batchelor similarity theory and two-dimensional inverse cascades
No full textWe study the scaling properties and Kraichnan-Leith-Batchelor (KLB) theory of forced inverse cascades in generalized two-dimensional (2D) fluids (-turbulence models) simulated at resolution . We consider (surface quasigeostrophic flow), (2D vorticity dynamics) and . The forcing scale is well-resolved, a direct cascade is present and there is no large-scale dissipation. Coherent vortices spanning a range of sizes, most larger than the forcing scale, are present for both and . The active scalar field for contains comparatively few and small vortices. The energy spectral slopes in the inverse cascade are steeper than the KLB prediction in all three systems. Since we stop the simulations well before the cascades have reached the domain scale, vortex formation and spectral steepening are not due to condensation effects; nor are they caused by large-scale dissipation, which is absent. One- and two-point pdfs, hyperflatness factors and structure functions indicate that the inverse cascades are intermittent and non-Gaussian over much of the inertial range for and , while the inverse cascade is much closer to Gaussian and non-intermittent. For the steep spectrum is close to that associated with enstrophy equipartition. Continuous wavelet analysis shows approximate KLB scaling () and () in the interstitial regions between the coherent vortices. Our results demonstrate that coherent vortex formation ( and ) and non-realizability () cause 2D inverse cascades to deviate from the KLB predictions, but that the flow between the vortices exhibits KLB scaling and non-intermittent statistics for and . The results will appear in \cite{BurgessEA2015}, which has been accepted to the \emph{Journal of Fluid Mechanics}
MLC2-CE_DJ_09 - Craig Elliot recordings, tape 9
No full textRecordings made by anthropologist Craig Elliott who lived at Galawdjapin and Garttji in the late 1980s. Item includes photographs of original tape. Tape notes say: 11AM 3-12-89 at Gal. -Jackie's (Mace) Raiwalla Ga Missionary Djanguny. Language as given
MLC2-CE_DJ_10 - Craig Elliot recordings, tape 10
No full textRecordings made by anthropologist Craig Elliott who lived at Galawdjapin and Garttji in the late 1980s. Item includes photographs of original tape. Tape notes say: Noon 5-12-89 at Gal. -Jackie's Waldjy (Father) Djanguny. Language as given
MLC2-CE_DJ_07 - Craig Elliot recordings, tape 7
No full textRecordings made by anthropologist Craig Elliott who lived at Galawdjapin and Garttji in the late 1980s. Item includes photographs of original tape. Tape notes say: Recordings made March 1989 for Rays Z [sister]. 1. WAK WAK [wakwak 'crow'] 2. GEGGANGIE BIRD [gikanggi 'friarbird'] 3. DJUDO-DJUDO [djutudjutu 'jungle fowl'] 4. MERE (pronounced MAIRRAY) [mirri 'ghost spirit']. Language as given
MLC2-CE_DJ_14 - Craig Elliot recordings, tape 14
No full textRecordings made by anthropologist Craig Elliott who lived at Galawdjapin and Garttji in the late 1980s. Item includes photographs of original tape. Tape notes say: My farewell Bunggul 16-1-90 Cont'd -Gorumba Gorumba Manikay - Richard Barndalil singing 16-1-90. Language as given
MLC2-CE_DJ_06 - Craig Elliot recordings, tape 6
No full textRecordings made by anthropologist Craig Elliott who lived at Galawdjapin and Garttji in the late 1980s. Item includes photographs of original tape. Original tape notes say: 1. Joe Goidarri [Gidarri] monologue (continued from tape #5) 000-418 2. Marlow Dick's Rungu Yul Djanguny 419-end. Language as given
MLC2-CE_DJ_12 - Craig Elliot recordings, tape 12
No full textRecordings made by anthropologist Craig Elliott who lived at Galawdjapin and Garttji in the late 1980s. Item includes photographs of original tape. Tape notes say: (A) Munyal's Rungu Yul Djanguny -Richard's Buparru Djanguny (B) Richard's Buparru Djanguny (cont'd). Language as given
MLC2-CE_DJ_08 - Craig Elliot recordings, tape 8
No full textRecordings made by anthropologist Craig Elliott who lived at Galawdjapin and Garttji in the late 1980s. Item includes photographs of original tape. Tape notes say: -Ray's Luma Luma / Mere Djanguny (transcription: Fldbk #5:1-13; Notes: Fldbk #4:72-5) -Jacki's Rungo Yul Djanguny. Language as given
MLC2-CE_DJ_13 - Craig Elliot recordings, tape 13
No full textRecordings made by anthropologist Craig Elliott who lived at Galawdjapin and Garttji in the late 1980s. Item includes photographs of original tape. Tape notes say: (A) My farewell Bunggul 16-1-90 (B) My farewell Bunggul 16-1-90. Language as given
MLC2-CE_DJ_11 - Craig Elliot recordings, tape 11
No full textRecordings made by anthropologist Craig Elliott who lived at Galawdjapin and Garttji in the late 1980s. Item includes photographs of original tape. Tape notes say: (A) Manikay recorded at funeral - Dec '89 (Master) (B) Manikay recorded at funeral - Dec '89 -Jackie Pascoe's crocodile Djanguny of Gumugearda (copy). Language as given
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