Reserch Advance in Flow Characteristics and Numerical Simulation Methods of Bend Channel Flow

The numerical simulation methods of bend flow are summarized on basis of analyzing the essential features of bend flow,including lateral slope of water surface,lateral circulation flow and average velocity along vertical line.This paper emphasizes analyzing the key factor of numerical simulation——the simulation methods of free surface,and the research progress of complex bend flow,such as the bend flow in compound cross section is summarized also.And finally,the future development of numerical simulation methods of bend flow is prospected.