摘要
采用经修正的k-ω模型,即基线k-ω模型对线性波作用下边界层的流速、紊动能、涡粘系数分布及底床剪应力进行了数值模拟,验证了模型的合理性,进而采用该模型模拟了粗糙底床摩阻流速及具有不同相对粗糙度的粗糙底床紊流边界层特性,发现边界层内流速与自由流速的相位差随计算点至底床的距离和相对粗糙度的增大而减小。
The revised k--ω model （baseline k--ω model） is used to stimulate the velocity, kinetic energy, eddy vis- cosity and the bottom shear stress of boundary layer under the action of linear wave. And the rationality of the model is verified. Then the model was applied to simulate the friction velocity and the characteristics of the rough turbulent bound- ary layer with different relative roughness. We found out that the phase difference between the boundary layer velocity and the free stream velocity decreases with increasement of the relative roughness and distance between computing point and bottom bed.
出处
《水电能源科学》
北大核心
2013年第3期86-89,共4页
Water Resources and Power
关键词
波浪
紊流边界层
基线k-ω模型
数值模拟
wave
turbulent boundary layer
baseline k-ω model
numerical simulation
