Question: 1. A sink of strength 20 m2 s-1 is situated 3 m upstream of a source of 40 m2 s-1 in a uniform irrotational stream. It is found that, at a point 2.5 m equidistant from both source and sink, the local velocity is normal to the line joining the source and sink. Find the velocity at this point and the velocity of the undisturbed stream.
2. A line source of strength m and a sink of strength 2m are separated a distance c. Show that the field of flow consists in part of closed curves. Locate any stagnation points and sketch the field of flow. (U of L)