Direct numerical simulation dataset of turbulent square duct flow

The dataset include mean flow data of square duct flow up to friction Reynolds number 1000 obtained from direct numerical simulation. The dataset also include coefficients obtained from Pope's generalized eddy viscosity framework, for different truncation of the polynomial expansion.本数据集包含通过直接数值模拟（direct numerical simulation）获取的、最高摩擦雷诺数（friction Reynolds number）达1000的方形管道流动平均流场数据。此外，数据集还涵盖基于波普（Pope）广义涡粘框架，针对不同多项式展开（polynomial expansion）截断阶数所得到的系数。