The three-dimensional single-fin configuration finds application in an intake geometry where the cowlshock wave interacts with the side-wall boundary-layer. Reynolds-averaged Navier-Stokes computations using standard Spalart-Allmaras model is carried out for three-dimensional single-fin configuration with well documented experimental data. The flow-physics is studied in the complex region of swept-shockwave turbulent boundary-layer interaction and is correlated to the wall pressure and skin-friction. Computed wall pressure and skin-friction is compared to the measurements