A transformation for the energytransfer term in isotropic turbulence
Abstract
The simple Reynoldsaverage description of turbulent boundarylayer flows is often considered sufficient for engineers, if only practical considerations are taken into account. However, from a fundamental point of view, the calculation of the actual turbulent solution of the NavierStokes equations is desirable. Unfortunately, the existing procedures for the calculation are computationally so exacting that their employment is only feasible under extremely limited circumstances. This is, in particular, true for the spectral approach. Even in the simplest, isotropic case, the computational load involved in the calculation of the rate of energy transfer per unit wavenumber between different wavenumbers through the socalled triadic integral may still be too heavy. The present study is concerned with a new procedure which reduces the computation time and has other advantages. The procedure involves the applicaiton of a particular transformation to the triadic integral.
 Publication:

Journal of Fluid Mechanics
 Pub Date:
 December 1985
 Bibcode:
 1985JFM...161..405O
 Keywords:

 Computational Fluid Dynamics;
 Energy Transfer;
 Isotropic Turbulence;
 NavierStokes Equation;
 Reynolds Number;
 Turbulent Flow;
 Fluid Mechanics and Heat Transfer