OpenFOAM data for a circular cylinder wake flow (Re=3900)

The current dataset contains numerical results from openfoam simulation of a cylinder wake at reynolds number Re=3900. The geometry has been constructed using blockMesh followed by snappyHexMesh tools : the 3D domain is a [0:20]x[-10:10]x[0:3.14] box crossed by a Z axis cylinder centered at Ccyl=(5,0) with a radius Rcyl=0.5. As for the simulation, the pimpleFoam solver of openfoam 21.12 has been used, followed with parafoam for post treatment visualization, and ITHACA-FV for POD The code has been run on a cluster with almost 28 CPUs with commands like : RUNNING (LES) decomposePar -decomposeParDict system/decomposeParDict -force mpirun -n 28 pimpleFoam -parallel mpirun -n 28 redistributePar -parallel -reconstruct -overwrite POST treatment In current directory, Iso Q generation for visualization : postProcess -func Q -time "500:600" In POD-* directory, POD using ITHACA-FV library and ANR code RedLUM. POD is performed on 500:1000 (train set) using the snapshot method. Temporal modes are also evaluated on 1000:1100 (test set) by snapshot projection.

本数据集包含雷诺数Re=3900工况下圆柱尾流的openfoam（openfoam）数值模拟结果。几何模型通过blockMesh与snappyHexMesh工具构建：三维计算域为尺寸[0:20]×[-10:10]×[0:3.14]的长方体，中心位于Ccyl=(5,0)、半径Rcyl=0.5的Z轴方向圆柱贯穿该计算域。本次模拟采用openfoam 21.12版本的pimpleFoam求解器，后处理可视化借助parafoam完成，本征正交分解（POD）则通过ITHACA-FV库实现。模拟代码运行于集群环境，共使用约28个CPU核心，相关运行命令如下：

# 大涡模拟(LES)相关命令
decomposePar -decomposeParDict system/decomposeParDict -force
mpirun -n 28 pimpleFoam -parallel
mpirun -n 28 redistributePar -parallel -reconstruct -overwrite

后处理流程如下：
在当前工作目录中，执行`postProcess -func Q -time "500:600"`生成用于可视化的等值Q面；
在POD-*目录下，借助ITHACA-FV库与ANR代码RedLUM开展POD分析：训练集选取500至1000时刻的流场数据，通过快照法构建本征正交模态；测试集选取1000至1100时刻的流场数据，通过快照投影法计算时域模态。

搜集汇总

背景与挑战

背景概述

该数据集提供了雷诺数为3900的圆柱尾流OpenFOAM模拟结果，包含从t=500到t=1100的时间序列数据，适用于流体动力学研究。数据生成使用了高性能计算集群，并包含后处理分析结果。