Abstract
A comparison is made between a number of properties of a quasi-homogeneous isotropic turbulent field obtained from a direct numerical simulation of the Navier-Stokes equation and its random counterpart with the same energy spectrum. It is demonstrated that some effects in a real flow have a considerable contribution of a kinematic nature (e.g. reduction of nonlinearity), while others are mostly dynamical (e.g. alignment between vorticity and eigenvectors of the rate of strain).
Original language | English |
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Pages (from-to) | 65-77 |
Number of pages | 13 |
Journal | Journal of Fluid Mechanics |
Volume | 247 |
DOIs | |
State | Published - Feb 1993 |