Detached Eddy Simulation of Turbulence Flows in a Pipe with Fractal Shape Orifices
Detached Eddy Simulation of Turbulence Flows in a Pipe with Fractal Shape Orifices
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DOI：
10.1007/978-3-642-03085-7_241
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
H. Zheng;F. Nicolleau;N. Qin
中科院分区：
文献类型：
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作者：
H. Zheng;F. Nicolleau;N. Qin
湍流是学术界和工业界都非常感兴趣的话题。虽然湍流的物理原理还不是很清楚，但我们可以肯定的一点是湍流的多尺度特性。这启发了我们研究具有多尺度分形孔的管道中的湍流流动。这是一个具有挑战性的问题，因为它包含了以分形方式分布的尺度，更重要的是，我们可以控制分形相互作用，并作为问题复杂性的函数来监测数值性能。虽然已经有一些关于这类问题的工作[1，2，3，4]，但关于这类问题的数值模拟还很少。分形法产生的湍流流动的数值结果大多采用直接数值模拟方法[5]。然而，结果只能与实验结果进行定性比较[5]。因此，在这项工作中，我们想要评估用分离涡模拟来研究分形孔后的湍流流动的可行性。
Turbulence flows are very interesting topics in both academia and industry community. Although the physics of turbulent flows is still not well understood, one property we can be sure of is the multi-scale nature of turbulent flows. This inspired us to investigate turbulence flows in a pipe with multiscale fractal-shape orifices. It is a challenging problem as it contains scales distributed in a fractal manner and more importantly we can control the fractal interaction and monitor the numerical performance as a function of the problem complexity. Although there are some works [1, 2, 3, 4] on this kind of problem, the numerical simulations on this topic are rare. Most of the numerical results of fractal generated turbulence flow employ the direct numerical simulation [5]. However, the results could only be compared qualitatively with the experiment results [5]. Thus, in this work, we would like to assess the feasibility of studying the turbulence flows after a fractal shape orifice by the detached eddy simulation.