The current work aims the flow in radial diffuser following an axial radial bend. This is a typical configuration in turbo machinery as flow retardation is needed at the same time as available axial space is limited. Although a simple geometry this configuration represents several complex flow phenomena that are challenging for numerical solvers such as flow in a bend and adverse pressure gradient. The current study aims to quantify the agreement between experimental data and a high fidelity numerical model using a spectral based numerical solver, SEMTEX. The results can be used to improve and evaluate simpler and more cost effective RANS models for future design purposes.