Ask help for Infinite Conductivity Fracture

Hello to every one,
I am a very new user to comsol environments. I want to design a flow process in Fracture reservoir. I need your help for How to set up anInfinite Conductivity Fracture in darcy model. My email address is 201511000111@stu.swpu.edu.cn.
I shall be very thankful to you for your kind actness.
best regards
How to set up anInfinite Conductivity Fracture in darcy model