کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
520969 | 867745 | 2006 | 22 صفحه PDF | دانلود رایگان |
A new approach, two level simulation (TLS), is developed based on the explicit reconstruction of the small-scale velocity by solving the small-scale governing equations on the domain with reduced dimension representing a collection of one-dimensional lines embedded in the three-dimensional flow domain. A coupled system of equations, that is not based on an eddy-viscosity hypothesis, is derived based on the decomposition of flow variables into the large-scale and the small-scale components without introducing the concept of filtering. Simplified treatment of the small-scale equations is proposed based on neglecting the small-scale advective and dissipative terms in the line orthogonal directions. Fully coupled simulation of the forced isotropic turbulence at Reλ ≈ 65, 114 demonstrates potential benefits and challenges of the TLS approach for high-Re turbulent flows using coarse grids.
Journal: Journal of Computational Physics - Volume 220, Issue 1, 20 December 2006, Pages 290–311