Question about how to obtain velocity field when we use SinglePhaseFlow solver with (isthermal = true)

[Neo-Zhu]

Hi, i am a new GEOSX user. now i am doing EGS simulation using SinglePhaseFlow solver with (isthermal = true). I can obtain the timehistory_tempreture and timehistory_pressure for all frature points. However, i don't know how to get the timehistory_velocity for all frature points. I appreciate it so much if anyone can give me some advices.

By the way, what is the governing equations of energy when we use the (isthermal = true)? where can i find the information?

Besides, i also want to know the numerical method is EDFM or DFN?

Thank you all in advance!

Neo