Molecular dynamics studies of the flow properties of liquids in nanochannel

The method of molecular dynamics is used to study the flow properties of liquids in the different cooling degree. The model system is composed of two parallel solid walls and confined fluid molecules. The distribution of velocities, densities and temperatures are obtained at five different cooling degrees. The simulation results show that the velocity distributions are different at different cooling degrees, even if at the same shear speed. The slip and the no-slip are all possible to take place to adjacent to solid wall for the different cooling degrees. At the same time, the ratio slips decrease as the cooling degrees increase. The average temperature of liquids decrease and the nonuniform density profiles and order structure increase with the increasing of cooling degrees. Note indirectly that the different temperature could cause the different density profiles and order structure.