COMSOL: Periodic inlet flow rate in a pipe

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To implement a periodic inlet flow rate (Q(t)) as a boundary condition in COMSOL for a 2D axisymmetric transient Navier-Stokes simulation, users need to utilize the periodic boundary condition feature. The challenge lies in effectively applying the flow rate data, which is already available as a vector from MATLAB, to the inlet boundary. Guidance on the specific steps for setting up this boundary condition in COMSOL is sought, as existing references appear insufficient for this task. The focus is on integrating the MATLAB data into the COMSOL environment to achieve the desired periodic flow rate at the inlet.
juvel006
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Hi all -

I would like to add a periodic inlet flow rate (Q(t) over an entire period T) as a BC in COMSOL. Does anyone know how to do this in 2D axisymmetric Transient Navier Stokes through COMSOL? I'm aware of the periodic boundary condition option available, but really just don't know how to use it and have found no good references to it. Any ideas or input to this problem would be appreciated.

- Zach
 
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PS: I already have the flow rate Q(t) data vector from matlab, now I want to make it a BC at the inlet!
 

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