Flow Function for Streamlines Representative of the Flow on a Plane in Three-Dimensional Flow.

Two-dimensional display of streamlines is considered to be suitable for the quantitative evaluation of the characteristics of the flow. In this investigation, a new concept of the flow function is proposed in order to obtain streamlines on an arbitrary section of threedimensional flow for visualizing and evaluating the characteristics of the flow. The streamlines separated by an arbitrary unit flow can be fined with the approximated point sources of the unit flow. These point sources are named simple sources.