what is effect if i set Luvsponge and Ltracersponge ??

[kobl1201]

Hello

what is effect for U and v 3-D velocity if i set Luvsponge and Ltracersponge are T or F ??

[kate]

The only way to really know for sure is to "Use the source, Luke". You can grep through the code and find things like:

Code: Select all

# ifndef ANA_SPONGE
      IF (LuvSponge(ng)) THEN 
        IF (.not.find_string(var_name,n_var,'visc_factor',vindex)) THEN 
          IF (Master) WRITE (stdout,10) 'visc_factor', TRIM(ncname)
          exit_flag=2
          RETURN
        END IF
      END IF
#  ifdef SOLVE3D
      IF (ANY(LtracerSponge(:,ng))) THEN 
        IF (.not.find_string(var_name,n_var,'diff_factor',vindex)) THEN 
          IF (Master) WRITE (stdout,10) 'diff_factor', TRIM(ncname)
          exit_flag=2
          RETURN
        END IF
      END IF
#  endif
# endif

and

Code: Select all

      IF (LuvSponge(ng)) THEN
# ifdef UV_VIS2
        DO i=IstrT,IendT
          DO j=JstrT,JendT
            visc2_r(i,j)=ABS(MIXING(ng)%visc_factor(i,j))*              &
     &                   visc2_r(i,j)
          END DO
        END DO

These are in get_grid.F and ini_hmixcoef.F, respectively. Anyway, they are ways to set spatially varying horizontal viscosity and diffusivity coefficients.