Fluid–structure coupling in time domain for dynamic stall using purely Lagrangian vortex method
Fluid–structure coupling in time domain for dynamic stall using purely Lagrangian vortex method
复制标题
使用纯拉格朗日涡法进行动态失速的时域流固耦合
DOI：
10.1007/s13272-021-00511-z
复制
发表时间：
2021
影响因子：
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通讯作者：
H. Muhammad
中科院分区：
文献类型：
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作者：
V. D. Duong;L. Zuhal;H. Muhammad
本文提出了纯快速拉格朗日涡法（FLVM），用于模拟经过高频振荡的起伏体和纵摇体的外部不可压缩流。流场中引入新生涡元以保留求解器的拉格朗日特性。使用核心扩展方法与分裂和合并空间自适应方案相结合来对粘性效应进行建模。粒子的速度使用 Biot-Savart 公式计算。为了加速计算，采用快速多极方法（FMM）。通过针对雷诺数范围为 50 至 9500 的脉冲启动气缸流动情况的时空收敛性研究，验证了 FLVM 求解器的有效性。然后，在对俯仰平板和振荡翼型周围的流动进行模拟时，证实了 FLVM 求解器的准确性。阻力和升力系数的时程以及涡度等值线与文献报道的结果非常吻合。此外，FLVM 用于确定振荡平板的颤振导数和颤振速度。结果与基于 Theodorsen 函数的理论解进行了比较。总的来说，结果与无粘性理论得到的结果非常吻合。
This paper presents the purely fast Lagrangian vortex method (FLVM) for the simulation of the external incompressible flows past heaving and pitching bodies with high-frequency oscillation. The Nascent vortex element is introduced to the flow field to retain the Lagrangian characteristics of the solver. The viscous effect is modeled using a core spreading method coupled with the splitting and merging spatial adaptation scheme. The particle’s velocity is calculated using Biot–Savart formulation. To accelerate computation, a fast multipole method (FMM) is employed. The validity of FLVM solver is verified by temporal and spatial convergence studies for the case of flows past an impulsively started cylinder at the Reynolds numbers ranging from 50 to 9500. The accuracy of FLVM is then confirmed for the simulation of flows around the pitching flat plate and oscillating airfoil. The time history of drag and lift coefficients and the vorticity contours show a good agreement with those reported in literature. Furthermore, the FLVM is employed to determine the flutter derivatives and flutter speed of an oscillating flat plate. Results are compared with theoretical solutions based on Theodorsen’s function. In general, the results agree well with those obtained by the inviscid theory.
先进涡元方法对新一代CFD中非定常涡流虚拟现实的贡献
DOI：
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发表时间：
2004
期刊：
Proc.of the 10^<th> Brazilian Congress of Thermal Sciences and Engineering-ENCIT 2004 Braz.Soc.of Mechanical Sciences and Engineering
影响因子：
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作者：
Murai;Y.;Yoshikawa;S.;Toda;S.;Ishikawa;M.;Yamamoto;F.;K.Kamemoto
通讯作者：
K.Kamemoto