Hello everyone,
As promised by @sjoshi in his last message, a thorough investigation was completed of how boundary conditions are written for turbulent simulations. This resulted in a small rework introduced in the latest release, which fixed the issue reported here. Now all simulations using turbulence models that include no-slip walls provide more accurate results. This can be seen in case of updated Turbulent Pipe Flow validation case, which now for both Wall Function and Full Resolution approaches gives results in close correspondence with predictions given by Darcy-Weisbach equation.
See more on Turbulent Pipe Flow validation project documentation page, and related SimScale project, that are now available at following links:
Documentation page: https://www.simscale.com/docs/content/validation/TurbulentPipeFlow/TurbulentPipeFlow.html
Validation project: SimScale
Additionally, please take note that for Full resolution case, a new set of recommended boundary conditions for walls can be found here as well.
We encourage you to re-run your own simulations and update us on the results.
Thank you @Carlos_Ramirez and @mas985 for helping us resolve this issue.