Q: In POLYDATA - How can I define a periodic boundary conditions based on flow rate for viscoelastic flow?


A: This can be done by editing the data file.

Remove the SOLVER defined for the calculation of inflow boundary conditions, and add a problem '53' (2D) or '54' (3D) to the main solver. That problems '53' and '54' are the same as for Newtonian calculations, and calculate a pressure gradient associated to the equation of flow rate.
A typical structure of that problem '53' is

#
BEGIN PROB1 13
# One problem specifications
. 1 0
C 16| Inflow
I 3| 53 1 3
I 2| 1 7
I 2| 2 9
I 2| 0 2
L 1| F
I 2| 5 0
D 0|
ENDOF PROB1

A similar concept is applied in 3D; the problem '54' is invoked.





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