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A priori and a posteriori tests of subgrid scale models for scalar transport

AutorJiménez, C.; Valiño García, Luis; Dopazo, C.
Fecha de publicación2001
EditorAmerican Institute of Physics
CitaciónPhysics of Fluids 13: 2433-2436 (2001)
ResumenA priori tests of subgrid scale (SGS) models for the transport of scalars by turbulence are performed by studying the transfer of scalar fluctuations between resolved and subgrid scales in a temporal mixing layer. They confirm that both forward and backward transfer are present, what can be best represented by mixed models (eddy-diffusivity+scale-similarity). However, a posteriori tests show that eddy-diffusivity models, even if only able to dissipate fluctuations from resolved to subgrid scales, give very similar results to mixed models, provided that an appropriate model is used for SGS stresses. © 2001 American Institute of Physics.
URIhttp://hdl.handle.net/10261/51256
DOI10.1063/1.1384891
Identificadoresdoi: 10.1063/1.1384891
issn: 1070-6631
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