@Article{CiCP-15-2,
author = {},
title = {Constrained Large-Eddy Simulation of Compressible Flow Past a Circular Cylinder},
journal = {Communications in Computational Physics},
year = {2014},
volume = {15},
number = {2},
pages = {388--421},
abstract = {<p style="text-align: justify;">Compressible flow past a circular cylinder at an inflow Reynolds number
of 2×10<sup>5&nbsp;</sup>is numerically investigated by using a constrained large-eddy simulation
(CLES) technique. Numerical simulation with adiabatic wall boundary condition and
at a free-stream Mach number of 0.75 is conducted to validate and verify the performance of the present CLES method in predicting separated flows. Some typical and
characteristic physical quantities, such as the drag coefficient, the root-mean-square lift
fluctuations, the Strouhal number, the pressure and skin friction distributions around
the cylinder, <em>etc</em>. are calculated and compared with previously reported experimental
data, finer-grid large-eddy simulation (LES) data and those obtained in the present LES
and detached-eddy simulation (DES) on coarse grids. It turns out that CLES is superior
to DES in predicting such separated flow and that CLES can mimic the intricate shock
wave dynamics quite well. Then, the effects of Mach number on the flow patterns and
parameters such as the pressure, skin friction and drag coefficients, and the cylinder
surface temperature are studied, with Mach number varying from 0.1 to 0.95. Nonmonotonic behaviors of the pressure and skin friction distributions are observed with
increasing Mach number and the minimum mean separation angle occurs at a subcritical Mach number of between 0.3 and 0.5. Additionally, the wall temperature effects on
the thermodynamic and aerodynamic quantities are explored in a series of simulations
using isothermal wall boundary conditions at three different wall temperatures. It is
found that the flow separates earlier from the cylinder surface with a longer recirculation length in the wake and a higher pressure coefficient at the rear stagnation point for
higher wall temperature. Moreover, the influences of different thermal wall boundary
conditions on the flow field are gradually magnified from the front stagnation point to
the rear stagnation point. It is inferred that the CLES approach in its current version is&nbsp;a useful and effective tool for simulating wall-bounded compressible turbulent flows
with massive separations.</p>},
issn = {1991-7120},
doi = {https://doi.org/10.4208/cicp.050513.270513a},
url = {https://global-sci.com/article/80494/constrained-large-eddy-simulation-of-compressible-flow-past-a-circular-cylinder}
}