This PR enables namelist control of the coefficient used in the Laplacian filter for momentum in the relaxation zone.
The Laplacian filter for momentum in the relaxation zone previously scaled the divergent component of the Laplacian with a hard-wired coefficient. With this commit, a new namelist option, config_relax_zone_divdamp_coef, has been introduced to allow for namelist control over this coefficient. The default value of config_relax_zone_divdamp_coef is 6.0, which is different from the previously hard-wired coefficient of 4.0 in the atm_bdy_adjust_dynamics_relaxzone_tend routine, reflecting the outcome of more recent testing.
This PR enables namelist control of the coefficient used in the Laplacian filter for momentum in the relaxation zone.
The Laplacian filter for momentum in the relaxation zone previously scaled the divergent component of the Laplacian with a hard-wired coefficient. With this commit, a new namelist option,
config_relax_zone_divdamp_coef, has been introduced to allow for namelist control over this coefficient. The default value ofconfig_relax_zone_divdamp_coefis 6.0, which is different from the previously hard-wired coefficient of 4.0 in theatm_bdy_adjust_dynamics_relaxzone_tendroutine, reflecting the outcome of more recent testing.