Showing papers by "Parviz Moin published in 1979"
01 Jan 1979
TL;DR: In this article, Fourier transforms were used for evaluating spatial derivatives to improve the accuracy of the large eddy simulation of homogeneous isotropic turbulence; in particular, the treatment of certain terms that arise in filtering the equations is considerably improved in both speed and accuracy.
Abstract: By using Fourier transforms for evaluating spatial derivatives, we are able to improve the accuracy of the large eddy simulation of homogeneous isotropic turbulence; in particular, the treatment of certain terms that arise in filtering the equations is considerably improved in both speed and accuracy. Use of vorticity as the principal variable is shown to be a viable and potentially useful alternative to the primitive variables. A method of deriving conservation properties of numerical schemes is given which is much simpler than previous methods and is widely applicable. The methods are applied to the computation of homogeneous isotropic turbulence, and it is found that the subgrid scale model is improved by using finite differences in place of “exact” derivatives.
82 citations
01 Jan 1979
TL;DR: In this paper, the methods presented in this paper have been applied to the flows described, and important results concerning the nature of these flows have been obtained, and they believe that LES shows promise for the future, and that its development should be continued.
Abstract: We believe that LES shows promise for the future, and that its development should be continued. The methods presented in this paper have been applied to the flows described, and important results concerning the nature of these flows have been obtained. For details see our reports [9, 11] or forthcoming papers.
9 citations