If large eddy simulation method is used to calculate the turbulent channel flow with strong shear

the commonly used sub-grid stress models

including wall modification model

will generate excessively high mean velocity profiles. It indicates that sub-grid stress model cannot describe the situation nearby the wall. To this end

the wall function of the sub-grid Reynolds stress model was modified to obtain a better result. The mean velocity profiles

the RMS(root-mean-square) velocity profiles and Reynolds stress profiles calculated by the modified model are consistent with the results of DNS.