Thank you for your quick response!

In switching to the k-w model (standard), the issue has been resolved and has very good agreement with the analytical solution (28 kPa)

# of divisions k-e pressure drop k-w pressure drop

10 24024 26496

20 23594 26647

30 22099 27209

50 28701 28580

100 36663 29317

200 41802 28170

300 43540 28196

A few other notes:

For calculating the mass flow rate, I multiplied by volume flow rate by 999.4 kg/m3, the density of water at my operating temp. When looking at inlet velocity, I divided the volume flow rate by the cross sectional area of the pipe.

For the mesh, I had absolutely no bias in the radial direction and no bias in the axial direction. All cells were exactly 1/500th of the axial length and 1/nth of the radial dimension (where n is the number of divisions).

For the axis symmetry, I did use the radius of the pipe. All of my initial learning in Ansys was via the EDX course offered by Cornell, which didn't have any modules with turbulent pipe flow (only laminar). Are you referring to the module offered here (https://confluence.cornell.edu/display/SIMULATION/FLUENT+-+Turbulent+Pipe+Flow)?

Lastly, I do plan on using your comments to make the k-e model work. I'll update here if successful.

Again, I appreciate your quick response!

Ryan