The gas-liquid two-phase flow in Pierce-Smith (PS) converter with single nozzle for copper smelting was simulated by the volume of fluid model, the jetting phenomena of gas injected into melt, gas penetration distance, pressure variation at the tuyere exit, and wall shear stress and gas holdup distributions were studied. The results show that the motion of gas flow at the tuyere exit has the forms of continuous generation and separation of bubbles. The gas penetration distance is about 3.6 times of the diameter of tuyere. The periodical formation time of pulse pressure is about 0.2 s, and the duration time about 0.04 s. The region with bigger wall shear stress is around and above the tuyere. The gas holdup increases with increasing of the melt height, and it has the value of 21% near the fluid free surface, partial simulation results agree with the data reported in the literature and industrial practice.