Hello, I am new to the flow simulation. I would like to simulate the flow in a cavity when the whole system is moving in high acceleration (127.53 m2/s). There is an inlet and outlet flow (please refer to attached file). The general setting are as follow:

General Setting:

Analysis: Internal , exclude cavities without flow condition

Gravity: Y component (-127.5 m/s^2)

Flow: Water

Inlet volume flow- 25 litre/min , uniform, absolute

Environment pressure outlet

I checked the result with the setting- gravity: Y component (-9.81 m/s^2) and I found that there is no difference with the result with the setting of gravity (-127.5m/s^2). I think my setting is no correct in this case. I would like to know how I can make the whole system accelerate?