Specified Monin-Obukhov Length

[hgopalan]

There are three ways to specify non-neutral stratification for ABL simulations: (i) specified heat-flux, (ii) specified temperature or heating/cooling rate and (iii) specified Monin-Obukhov length. This PR adds the capability for the third methodology in which the Monin-Obukhov length is kept constant. This method is used often in RANS simulations to do wind turbine siting for non-neutral cases (faster convergence rate) and minimize the mismatch between wall boundary condition and inflow profile.

Please check the type of change introduced:

• Bugfix
• [X ] Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

Checklist

The following is included:

• new unit-test(s)
• new regression test(s)
• documentation for new capability

This PR was tested by running:

• the unit tests
  • on GPU
  • [X ] on CPU
• the regression tests
  • on GPU
  • on CPU

To be added:

1. New unit test
2. New regression test
3. Documentation