Generation of divergence free synthetic inflow turbulence with arbitrary anisotropy
Generation of divergence free synthetic inflow turbulence with arbitrary anisotropy
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DOI：
10.1016/j.compfluid.2018.01.018
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发表时间：
2018-03
影响因子：
2.8
通讯作者：
H. Kröger;N. Kornev
中科院分区：
文献类型：
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作者：
H. Kröger;N. Kornev
本文对合成湍流的湍流斑点法进行了改进。早期版本的湍斑方法和合成涡流方法只能产生通常不符合连续性约束的湍流。这仅适用于特殊情况(各向同性或近各向同性湍流)。所提出的扩展可以在生成任意各向异性湍流的同时满足连续性约束。这是由于引入了一种新型的湍流结构。给出了内部速度场的推导。给出了新结构的统计性质的表达式，并在通用测试用例上说明了该扩展的性能。
The paper presents an improvement to the Turbulent Spot method for generation of synthetic turbulence. Earlier versions of the Turbulent Spot method and the Synthetic Eddy method were only able to produce turbulence which does not obey the continuity constraint in general. This was only possible for special cases (isotropic or near-isotropic turbulence).The proposed extension enables the generation of arbitrary anisotropic turbulence and fulfillment of the continuity constraint at the same time. This is made possible by the introduction of a new type of turbulent structure. The derivation of the internal velocity field is given. Also, expressions for the statistical properties of the new structure are derived.The performance of the proposed extension is illustrated on generic test cases.