i will simulation the airflow in cylinder of internal engine,but i don't know how to define the boundary conditons,such as velocity,turbulenc,density,temperature which changed with time,who can give me some advice or give me a example,thank's a lot.

You have two options - tables or user subroutines.

These are activated using the "Options" toggle in the boundary condition panel.

if use table, 720 data is very difficult to set ,can you give some suggestion or give me a example?thank you very much.