Based on the variable time interval average method,a multi-scale two-phase turbulent model was put forward and established.Compared with the experiment results,the rationality of the multi-scale gas-liquid two-phase mathematic model,the modeling parameters and interactive mechanism of gas-liquid two-phase flows was proved.Its relative error of drag coefficient was 1.45%,and the fluctuating lift coefficient was 0.323%.This model could also accurately predict vortex shedding characteristics with its relative ...