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More detail about my model if you need :

I need some guides about heat transfer in porous media. I need to model temperature field incide porous matrix when fluid flow inside porous matrix while I have some heat flux from boundaries. my geometry is simple. it is a axisymetric disk. the fluid flow inside matrix is caused by boundary loads on porous matrix.
to do this simulation first I tried to extract velocity field inside the matrix. first I defined a poroelastic model form structural mechanics. The model is time dependent. In this model I have a porous media in which following appling cyclic loads on porous matrix and defining boundary pressure, it is possible to extracted fluid velocity field in porous media in each time step.
Then to model heat transfer in this porous media I added a new model" heat transfer in porous media" in same simulation.
but I have problem! my quistion is:
1:how to couple these to model. because when I add a new model from model builder it needs to define a new geometry while I need to use the same geometry form model 1 because the should be coupled.
2: how I can couple these two model to have fluid velocity field output from first simulation as a input for second simulation at each time step. because for modeling heat transfer in porous media I should input velocity of fluid. and I want to take it from my poroelastic model.

Thank you for you help
Ps: I didn't find any example for heat transfer in porous media and in user guide there is just a short introduction. is there any example for that especially which forced fluid flow inside matrix which is like my case?!

To be able to couple them you should add it to the same model. Instead of defining a new model for the heat transfer, right click the initial model and select "Add physics" and add the heat transfer in the same model.

Under "Heat transfer in fluids" you should then be able to choose velocity field calculated from your other physics.
In other words, to couple two physical processes together they have to be included in the same model, not only the same "file".

Do what Paul says, and then in the field were says heat transfer in fluids, choose in the velocity field, the one of the other physics, for example the velocity field wich give the Darcy ecuations (dl/dlm1).