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.