[clau90]

Hi,
I am trying to model the transport of non reactive particles in a blood vessel, which I have defined with the additional variable function. The diffusivity coefficient for these particles is dependent on the shear strain rate, with a linear relationship defined as:

Deff = alfa * sstrnr + D

Where alfa is a given coefficient. I have initially tried to assign this expression to the kinematic diffusivity, but the software wouldn't recognize the sstrnr variable. For this reason, I have defined another additional variable (unspecified) for the diffusivity equal to the expression, and then assigned this value to the diffusivity coefficient.

The software is not giving me any error. However, when I try to run my definition file, I get an error:

Error processing expression 'Kinematic Diffusivity'.
The expression is invalid because:
Diffusiv is not available for use in this term

Error processing expression: Kinematic Diffusivity = Diffusiv
+--------------------------------------------------------------------+
| An error has occurred in cfx5solve: |
| |
| C:\Program Files\ANSYS Inc\v150\CFX\bin\winnt-amd64\ccl2flow.exe |
| was interrupted by signal QUIT (3) |
+------------------------------------------

I have tried to run a steady state simulation assigning a constant value to the diffusivity, so that the variables could be initialised and started my new one from that, but it's giving the same error. What am I doing wrong? How can I fix this error?

Thank you,

Claudia