FREE-SURFACE OF A HIGH-SPEED CAPILLARY JET

A free surface shape of a viscous liquid jet is investigated at large Reynolds and Weber numbers. The jet is ejected into a vacuum from a cy lindrical nozzle with a flat exterior surface. The liquid is completel y wetting the nozzle material (zero contact angle). Free jet surface i s noncylindrical near the nozzle. There is a smooth connection between the flat external surface of the nozzle and the cylindrical surface o f the jet away from the nozzle. The size of the connection region is e stimated by means of the boundary layer technique.