Pulsatile flow for global mass conservation
I have a question for pulsatile flow.
In pulsatile flow, negative inflow is generated during some period.
To conserve global mass conservation, mass flux should be also negative in the outlet side.
And I use convective boundary condition in the outlet side.
dui/dt + cdui/dx = 0
After applying to convective boundary condition, following equation is used.
At this procedure, some problems occurs.
If Qin is zero, ui becomes zero.
I think this flow is non-physical.
Do you have any ideas to fix this problem?
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