Based on the basic governing equations,the effect of the ocean conditions on the flow characteristics of the forced circulation is analyzed,and is simulated and verified by CFD calculation method.The calculation results showed that under a given velocity,the gravitational force,centripetal force and angular acceleration force caused little effect on the flow configuration and frictional resistance.But the Coriolis force caused by rolling effect,can influence the flow configuration,and with the larger palstance,it will influence the frictional resistance.