The force condition of spherical inclusion particles in 1873 K liquid steel was investigated by theoretical analysis and numeric simulation. It is found that the pressure gradient force, virtual mass force, Saffman force and Magnus force are little and can be ignored in static steel and turbulent flow fields. With increasing inclusion particle size, the Brown force imposed on the particles with a bigger size gradually decreases in static liquid steel and homogeneous turbulence fields. When the particle size...