be the value of the previous iteration, and 
be the value computed during the current iteration. The update is controlled as follows:
This solver controls the update of the turbulent viscosity.
Let be the value of the previous iteration, and be the value computed during the current iteration. The update is controlled as follows:
) permitted during the update process. This is used to prevent unphysically high values of turbulent viscosity from occurring on the path to convergence.
for the update of turbulent viscosity. The default value is 1.0.