dc.contributor.author | Bhattacharya, A. | en |
dc.contributor.author | Kassinos, Stavros C. | en |
dc.contributor.author | Moser, R. D. | en |
dc.creator | Bhattacharya, A. | en |
dc.creator | Kassinos, Stavros C. | en |
dc.creator | Moser, R. D. | en |
dc.date.accessioned | 2019-05-06T12:23:24Z | |
dc.date.available | 2019-05-06T12:23:24Z | |
dc.date.issued | 2008 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/48256 | |
dc.description.abstract | A locally homogeneous representation for the two-point, second-order turbulent velocity fluctuation Rij(x,r) = 〈u′i(x)u′i(x+r)〉 is formulated in terms of three linearly independent structure tensors [Kassinos et al., J. Fluid Mech. 428, 213 (2001)]: Reynolds stress Bij, dimensionality Dij, and stropholysis Q*ijk. These structure tensors are single-point moments of the derivatives of vector stream functions that contain information about the directional and componential anisotropies of the correlation. The representation is a sum of several rotationally invariant component tensors. Each component tensor scales like a power law in r, while its variation in r/r depends linearly on the structure tensors. Continuity and self-consistency constraints reduce the number of degrees of freedom in the model to 17. A finite Re correction is introduced to the representation for separations of the order of Kolmogorov's length scale. To evaluate our representation, we construct a model correlation by fitting the representation to correlations calculated from direct numerical simulation (DNS) of homogeneous turbulence and channel flow. Comparison of the model correlation to the DNS data shows that the representation can capture the character of the anisotropy of two-point second-order velocity correlation tensors. © 2008 American Institute of Physics. | en |
dc.language.iso | eng | en |
dc.source | Physics of Fluids | en |
dc.subject | Rhenium | en |
dc.subject | Internet protocols | en |
dc.subject | Correlation methods | en |
dc.subject | Direct numerical simulation | en |
dc.subject | Tensors | en |
dc.subject | Reynolds number | en |
dc.subject | Reynolds stresses | en |
dc.subject | Anisotropy | en |
dc.subject | Turbulence | en |
dc.subject | Velocity | en |
dc.subject | Consistency constraints | en |
dc.subject | DNS datums | en |
dc.subject | Flow simulation | en |
dc.subject | Homogeneous turbulences | en |
dc.subject | Kolmogorov | en |
dc.subject | Length scales | en |
dc.subject | Number of degrees of freedoms | en |
dc.subject | Power laws | en |
dc.subject | Structure tensors | en |
dc.subject | Tensor scales | en |
dc.subject | Turbulence velocities | en |
dc.subject | Turbulent velocity fluctuations | en |
dc.subject | Vector stream functions | en |
dc.subject | Velocity correlations | en |
dc.title | Representing anisotropy of two-point second-order turbulence velocity correlations using structure tensors | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1063/1.3005818 | |
dc.description.volume | 20 | |
dc.author.faculty | Πολυτεχνική Σχολή / Faculty of Engineering | |
dc.author.department | Τμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering | |
dc.type.uhtype | Article | en |
dc.contributor.orcid | Kassinos, Stavros C. [0000-0002-3501-3851] | |
dc.gnosis.orcid | 0000-0002-3501-3851 | |