“…The one is that the empirical Equation ( 11) was obtained under the condition of a singlenozzle jet vertically impinging on liquid surface, without considering the coalescence effect of the multinozzle jet, and another one is that the simulations were conducted at the converter temperature of 1873 K; however, the empirical formula was obtained at room temperature. Many researchers [38][39][40] have observed that the ambient temperature has a significant effect on the dynamic characteristics of the jets, which further affects the cavity shape. In addition, within the allowable range of error, the depth of the cavity obtained by empirical Equation ( 11) is in good agreement with the changing trend of the CFD results.…”