Option-1 Manual Setup
Open Fluent 2025 R2
In the top ribbon, File > Read > Case > pulse_pipe_fluid_vol_transient_exp.cas.h5
In the outline view on the left > Case View > Solution > right click Initialization > Initiliaze
Solution > Calculation Activities > Run Calculations > Calculate
Once solution is completed > File > Write > Case & Data

Option-2 Journal Setup
In the top ribbon, File > Read > Journal > solve0.jou