FREE-SURFACE SHAPES OF A JET INJECTING THROUGH A POROUS WALL

For a jet incident on a porous wall at which the normal fluid speed is specified, it is found that the problem of determining the free surfa ce of the jet is governed by a system of nonlinear integral equations relating the flow angles on the boundary, on the free surface, and on the porous wall. With a constant normal speed at the porous wall, the system reduces to an integral equation for the flow angle, which is so lved numerically; and a comparison with previous results is made. Nume rical results, corresponding to different nonconstant normal jet speed s along the porous wall, are also presented. The extension of this for mulation to include the effect of gravity is also given.