Numerical simulations have been performed for a vertical jet impinging on a flat and conical surface for elucidating the effect of initial momentum flux on the jump radius. The Reynolds number, Re, based on jet inlet radius in the simulations was varied in the range from \(10^2\) to \(2\times 10^3\) . By varying the jet-nozzle radius from 4.6 to 1.6 mm (for a fixed flow rate), the impact of initial momentum flux was investigated. Simulation results indicate a strong correlation between initial momentum flux and the jump radius, apart from other governing parameters. However, surface tension was observed to have a negligible impact, consistent with the findings of Wang et al. [12]. The simulation data set was well-matched using a modified scaling approach based on energy dissipation arguments as presented in Vishwanath et al. [11].