This report describes the flow behavior of a water jet impinging on a rotating disk and flowing radially in the form of a thin liquid film on the disk. The flow is governed by the wall friction of the rotating disk, and at the same time, by the impining force. Hence, there is no similarity transformation to reduce the partial differential equations to the ordinary ones. Nevertheless, a
... [Show full abstract] similarity-type transformation making use of a stream function is applied to appropriate nonsimilar boundary-layer equations. The final equations are solved numerically by the finite difference method. The results show more realistic velocity profiles than those obtained by Miyasaka.