Analysis of passive scalar gradient alignment in a simplified three-dimensional case

Physics of Fluids, Vol. 18, No. 5. (2006)

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Abstract

Numerical simulations as well as recent experiments in turbulent three-dimensional flow show a trend of the gradient of a passive scalar to align with the compressional axis of the strain tensor. In two-dimensional flow, however, it has been proved that the most probable orientation of the scalar gradient can be different from the compressional direction. An idealized situation is used to address this question in the three-dimensional case and to suggest a possible way to reexamine the scalar gradient alignment in three-dimensional flow. This kind of analysis can be applied to the material line alignment as well. ©2006 American Institute of Physics

@article{citeulike:613665, abstract = {Numerical simulations as well as recent experiments in turbulent three-dimensional flow show a trend of the gradient of a passive scalar to align with the compressional axis of the strain tensor. In two-dimensional flow, however, it has been proved that the most probable orientation of the scalar gradient can be different from the compressional direction. An idealized situation is used to address this question in the three-dimensional case and to suggest a possible way to reexamine the scalar gradient alignment in three-dimensional flow. This kind of analysis can be applied to the material line alignment as well. \©2006 American Institute of Physics}, author = {Garcia, A. and Gonzalez, M. }, citeulike-article-id = {613665}, doi = {10.1063/1.2196091}, journal = {Physics of Fluids}, keywords = {alignment, material-lines, scalar}, number = {5}, posted-at = {2006-05-04 17:51:53}, priority = {2}, publisher = {AIP}, title = {Analysis of passive scalar gradient alignment in a simplified three-dimensional case}, url = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal\&id=PHFLE6000018000005058101000001\&idtype=cvips\&gifs=yes}, volume = {18}, year = {2006} }

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TY - JOUR ID - citeulike:613665 L3 - citeulike-article-id:613665 TI - Analysis of passive scalar gradient alignment in a simplified three-dimensional case JF - Physics of Fluids VL - 18 IS - 5 PB - AIP N2 - Numerical simulations as well as recent experiments in turbulent three-dimensional flow show a trend of the gradient of a passive scalar to align with the compressional axis of the strain tensor. In two-dimensional flow, however, it has been proved that the most probable orientation of the scalar gradient can be different from the compressional direction. An idealized situation is used to address this question in the three-dimensional case and to suggest a possible way to reexamine the scalar gradient alignment in three-dimensional flow. This kind of analysis can be applied to the material line alignment as well. ©2006 American Institute of Physics KW - alignment KW - material-lines KW - scalar AU - Garcia, A AU - Gonzalez, M PY - 2006/// UR - http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PHFLE6000018000005058101000001&idtype=cvips&gifs=yes ER -

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