According to the relationship between energy dissipation rate and shear rate,average shear rate to evaluate the shear action for annular pipe flow is obtained by using energy dissipation rate.

• 根据能量耗散率与剪切率的关系,采用体积平均能量耗散率计算环空管流的平均剪切率,以此来评价环空管流的剪切作用。