This paper reviews the module types,calculation of membrane surface shear rates,domestic and overseas research advances in vibratory shear enhanced membrane filtration process.

The bottom shear stress and sediment movement for a wave-current coexisting system;

Based on the theory of boundary layer, a shear stress has been derived;the carring capacity for wave-current system has been introduced by means of the energy theory and a series of coefficients are given as well.

A theoritical bottom shear stress for a wave-current coexisting system is derived by means of the theory of boundary layer assumption.

The analysis results shown that the effect of interfacial shear stress cannot be ne- glected for a small diameter thermosyphon,especially for a small inclination degree to horizon.

By selecting two shapes of V and U,simulating and computing the test-bed model,and comparing the wall shear force and turbulence intensity of the test-bed which with ridge surface with the data of the one which without,we get a good result.