The CFD model combines transport phenomena and numerical mathematics to solve physical problems. Although numerical modelling of flow scenarios is the cutting edge of flow modelling, there seems to be room for improvement. This paper proposes an approach for enhancing computation of turbulent jet as far as processing time is concerned. The methodology is based on an equivalent diameter and velocity profile calculated downstream the jet orifice. The novel model DESQr (Diameter of Equivalent Simulation for Quick Run) shows good agreement with experimental data and a significant computational time reduction is observed. Findings are also compared with commercial (ANSYS CFX) CFD tool.