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Boundary condition of an injection from a point source - PDE mode

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I try to model a gas injection into a water saturated porous medium. The injection, written in m/s should be happened out of a point at the bottom of my rectangled area.

I am working with the PDE mode and I have no idea how to express my injection via
weak term
or time-dependent weak term
or constraint??????

I hope, somebody can help me.

kind regards,

0 Replies Last Post Aug 9, 2010, 5:54 AM EDT
COMSOL Moderator

Hello Johanna Smaczny

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