For the titanium alloy vertical centrifugal casting process

combined with particle tracking velocimetry（PTV）

the filling speed of similar fluids to titanium alloys was quantitatively characterized.Firstly

based on the principle of physical simulation similarity

an experimental mold was designed and a similar fluid at room temperature was configured.Secondly

physical simulation experiments with different mold rotation speed and pouring speed were carried out

and the PTV method was used to obtain the transient speed of particles moving with the fluid.Finally

the characteristics of fluid motion was analyzed that the tracer particles would move along the cavity wall surface opposite to the rotation speed

and through properly increasing the centrifugal speed and reducing the pouring speed under low speed conditions

their were conducive to the smooth filling of the fluid.