As far as CFD simulations are concerned, a numerical methodology has been implemented and validated against experimental data. The predictive capability of an atomization model, at first Fig. 30. Spray penetration Prail = 50.0 MPa, numerical and experimental comparison of all jets. Grid size 1 mm. Fig. 31. 5-holes spray images, Prail = 30.0 MPa, numerical and experimental comparison. Grid size 1 mm. Fig. 32. 5-holes spray images, Prail = 50.0 MPa, numerical and experimental comparison. Grid size 1 mm. L. Postrioti et al. / Fuel 118 (2014) 316–328 327 implemented for multihole GDI sprays, has been investigated. The approach aims at providing a simplified yet generalized estimation of the flow conditions adopting basic and well-known injector characteristics. Since the non-conventional layout of the nozzle, the fuel sprays are affected by the different configurations of the holes.