porus media flow study using darcy law
 

Hello,
I have simply designed a cylindrical pipe along a block in COMSOL Multiphysics. Pipe wall and block are considered as poroelastic material. I wanna pass the fluid as a laminar flow along the pipe. Depending on Darcy law it scatters in the whole region. Inlet and outlet conditions are shown in the image included.
one inlet outlet for laminar flow and surface of the pipe wall is considered as inlet and outer surface of block is considered as outlet for Darcy's law. Problem is : I can't use the pipe wall as inlet for darcy law as it shows not applicable. How can I solve this problem?