摘要：Unsteady separated flows around bluff bodies such as cubes, rectangular and
circular cylinders and flat plates are relevant to many engineering designs.
For numerical validations, some test cases have been chosen as benchmarks in
the turbulence modeling community where several numerical methods, Sub-Grid
Stress (SGS) models and mesh resolutions are currently validated, see paper
by Kogaki1 We have performed Large Eddy Simulations of the three dimensional
flow field around a wall-mounted cube, a very popular benchmark. In this
case, experiments show a fully turbulent flow regime everywhere and displays
no obvious regularity or periodicity and contains many coherent structures
both downstream and upstream. The selected flow conditions for the present
numerical simulations are taken from those suggested by Rodi.2 The Reynolds
number is 40,000 while the boundary conditions include a fully
developed channel flow at inlet, periodic at lateral sides, null pressure at
outlet and no-slip at the wall surface. Here, the upstream flow at inlet is a
fully developed channel flow which is obtained by a previous running for such
case. Flow visualization is used to clarify the flow behavior.
