Method for analyzing flow characteristics of flow field in multi-flow continuous casting tundish

The invention relates to a method for analyzing flow characteristics of a flow field in a multi-flow continuous casting tundish, which comprises the following steps of: 1, obtaining a dimension-free residence time density distribution function (RTD) curve of each flow of an N-flow continuous casting tundish by adopting a stimulus response method; 2, based on the dimension-free RTD curve of each flow of the tundish, calculating by adopting the following formula to obtain an overall dimension-free RTD curve of the N-flow tundish; 3, based on the overall dimension-free RTD curve of the tundish, acquiring the standard deviation of an overall residence time distribution density function through calculation according to the following formula; 4, based on the standard deviation of the overall residence time distribution density function (RTD curve), acquiring the volume fraction (Vp) of a piston area in the tundish through calculation according to the following formula; wherein vp is equal to1 minus sigma; 5, based