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?
The gravity component manifests itself mostly in potential energy changes as your flow goes through large elevation changes. Additionally the potential energy factor is usually only significant in flows with low dynamic pressure changes (such as low Reynolds number flows.) Is that the case here? You mention your flow rate is 25 L/min but without any sense of scale of this object it's hard to say what your flow velocities are.
I notice that your inlet and outlet are at the same elevation relative to the gravitational potential, and your internal flow cavity looks rather flat, so I don't expect gravity to play a huge role here.