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A study of subgrid scale modelling and inflow boundary conditions for large eddy simulation of wall-bounded flows

机译:作者:张莹莹,王汝传,王汝传,岩土力学ROCK

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摘要

The complicated turbulence structures in wall-bounded flows require accurate subgrid scale, SGS, modelling and realistic inlet boundary conditions for Large Eddy Simulation, LES. The present study focused on the investigation and development of transport equation SGS models and on the development of inlet conditions generation algorithms specialised for LES of wall-bounded flows. The investigation of SGS models has been carried out in two stages. In the first stage, models based on resolved scales and models based on subgrid scales were tested on a series of channel flow cases. Among the second group of models, there was a new SGS model whose development was based on the concept of dissipation calculated from the energy spectrum. The results indicated the superiority of the models based on subgrid scales, with the new model providing the most accurate flow field in general. (Continues...).
机译:大型涡模拟中,复杂的湍流结构需要边界精确的子网格尺度SGS,建模和实际的入口边界条件。本研究的重点是输运方程SGS模型的研究和开发,以及专门针对边界流LES的入口条件生成算法的开发。 SGS模型的研究分两个阶段进行。在第一阶段,在一系列通道流情况下测试了基于可分辨尺度的模型和基于子网格尺度的模型。在第二组模型中,有一个新的SGS模型,其开发基于从能谱计算的耗散概念。结果表明基于亚网格规模的模型的优越性,新模型通常提供最精确的流场。 (继续...)。

著录项

  • 作者

    Veloudis Ioannis;

  • 作者单位
  • 年度 2006
  • 总页数
  • 原文格式 PDF
  • 正文语种 English
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