Direct numerical simulation of flow around a 3D finite square cylinder using the Sunway Taihu Light

网格数/百万	MPI / MPI+Athread/%
网格数/百万	进程数4	进程数16	进程数64	进程数128
注：并行效率计算参照对象：MPI（单个主核计算耗时）；MPI+Athread（单个核组耗时：主核+从核组）
1（100×100×100）	93.2/84.88	87.14/53.35	73.07/28.50	50.35/14.78
3.375（150×150×150）	95.37/87.57	89.68/55.23	77.39/34.30	65.42/20.25
8（200×200×200）	96.35/90.84	91.24/59.46	84.31/40.48	73.30/24.16
15.625（250×250×250）	99.94/91.34	95.47/62.95	87.03/40.82	85.98/34.24

Table 2. The related parameters of simulation for the flow around square cylinder
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Table 2. The related parameters of simulation for the flow around square cylinder
网格数/百万网格分辨率时间步长/s Re 核数迭代步数/s 耗时/h
3.84 (240×160×100) 0.1d 0.001 250 33 280 6×10⁵ 17
30.72 (480×320×200) 0.05d 33 280 79
245.76 (960×640×300) 0.025d 133 120 160

Table 3. The characteristic frequency of different grid sizes for flow around a square cylinder
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Table 3. The characteristic frequency of different grid sizes for flow around a square cylinder
网格数/百万 x=15d x=22d
主频/Hz 主频幅值/dB 主频/Hz 主频幅值/dB
3.84 0.129 −15.96 0.129 −16.46
30.72 0.130 −14.08 0.130 −15.70
245.76 0.130 −13.86 0.130 −14.93

Table 4. The average flow resistance coefficient and Strouhal number of the flow around a 3D finite square cylinder with different slenderness ratio
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Table 4. The average flow resistance coefficient and Strouhal number of the flow around a 3D finite square cylinder with different slenderness ratio
算例 H/d St C_d
本文计算 2 0.095 1.075
3 0.115 1.18
4 0.130 1.245
文献[10] 2 0.097 1.08
3 0.114 1.16
4 0.124 1.23

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Yaying ZHANG, Chengsheng WU, Jianchun WANG, Yixing JIN. Direct numerical simulation of flow around a 3D finite square cylinder using the Sunway Taihu Light[J]. Chinese Journal of Ship Research, 2022, 17(3): 205

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Paper Information

Category: Ship Design and Performance

Received: Nov. 17, 2021

Accepted: --

Published Online: Mar. 25, 2025

The Author Email:

DOI:10.19693/j.issn.1673-3185.02595

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. The parallel efficiency of MPI/MPI+Athread for 3D cavity driven flow

Table 1. The parallel efficiency of MPI/MPI+Athread for 3D cavity driven flow

Table 2. The related parameters of simulation for the flow around square cylinder

Table 2. The related parameters of simulation for the flow around square cylinder

Table 3. The characteristic frequency of different grid sizes for flow around a square cylinder

Table 3. The characteristic frequency of different grid sizes for flow around a square cylinder

Table 4. The average flow resistance coefficient and Strouhal number of the flow around a 3D finite square cylinder with different slenderness ratio

Table 4. The average flow resistance coefficient and Strouhal number of the flow around a 3D finite square cylinder with different slenderness ratio