PDF
Full
Outline
There still remain many challenging topics for CFD to numerically simulate flow around a bluff body at subcritical Reynolds numbers, such as the high-fidelity resolving and capturing for instability structures in the shear layer, as well as the periodic shrinkage and enlargement of the recirculation region. This paper presents the development of a RANS-based wall-modeled large eddy simulation method (RANS-WMLES) to provide a high-fidelity CFD tool for numerically simulating such complex flow phenomena around a bluff body. Such a new method is different from traditional hybrid RANS/LES models. In particular, for the new method the transition from RANS to LES can be achieved through a filtering parameter which is only related to local grid parameters. Moreover, the transition can be pre-controlled through two customizable parameters
and
for not only the transition boundary positions between RANS and LES, but also the ability of resolving turbulent kinetic energy. A series of numerical simulations for flow past a sphere at subcritical Reynolds number Re=3700 show that the new method is capable of resolving and capturing with high-fidelity temporally/spatially developed coherent structures for such complex three-dimensional flows around a sphere.
PDF
115
56
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
