Changeset 6314 for branches/2015/nemo_v3_6_STABLE/NEMOGCM/NEMO/OPA_SRC/ZDF/zdftke.F90

Timestamp:

2016-02-15T13:04:56+01:00 (8 years ago)

Author:

cetlod

Message:

3.6 stable : Add a new parameterization of tidal mixing, see ticket #1678

File:

• branches/2015/nemo_v3_6_STABLE/NEMOGCM/NEMO/OPA_SRC/ZDF/zdftke.F90 (modified) (2 diffs)

branches/2015/nemo_v3_6_STABLE/NEMOGCM/NEMO/OPA_SRC/ZDF/zdftke.F90

@@ -357 +357 @@
             DO ji = fs_2, fs_jpim1   ! vector opt.
                zcof   = zfact1 * tmask(ji,jj,jk)
+# if defined key_zdftmx_new
+               ! key_zdftmx_new: New internal wave-driven param: set a minimum value for Kz on TKE (ensure numerical stability)
+               zzd_up = zcof * ( MAX( avm(ji,jj,jk+1) + avm(ji,jj,jk), 2.e-5_wp ) )   &  ! upper diagonal
+                  &          / ( fse3t(ji,jj,jk  ) * fse3w(ji,jj,jk  ) )
+               zzd_lw = zcof * ( MAX( avm(ji,jj,jk) + avm(ji,jj,jk-1), 2.e-5_wp ) )   &  ! lower diagonal
+                  &          / ( fse3t(ji,jj,jk-1) * fse3w(ji,jj,jk  ) )
+# else
                zzd_up = zcof * ( avm  (ji,jj,jk+1) + avm  (ji,jj,jk  ) )   &  ! upper diagonal
                   &          / ( fse3t(ji,jj,jk  ) * fse3w(ji,jj,jk  ) )
                zzd_lw = zcof * ( avm  (ji,jj,jk  ) + avm  (ji,jj,jk-1) )   &  ! lower diagonal
                   &          / ( fse3t(ji,jj,jk-1) * fse3w(ji,jj,jk  ) )
+# endif
                   !                                                           ! shear prod. at w-point weightened by mask
                zesh2  =  ( avmu(ji-1,jj,jk) + avmu(ji,jj,jk) ) / MAX( 1._wp , umask(ji-1,jj,jk) + umask(ji,jj,jk) )   &
@@ -735 +743 @@
       !
       ri_cri   = 2._wp    / ( 2._wp + rn_ediss / rn_ediff )   ! resulting critical Richardson number
+# if defined key_zdftmx_new
+      ! key_zdftmx_new: New internal wave-driven param: specified value of rn_emin & rmxl_min are used
+      rn_emin  = 1.e-10_wp
+      rmxl_min = 1.e-03_wp
+      IF(lwp) THEN                  ! Control print
+         WRITE(numout,*)
+         WRITE(numout,*) 'zdf_tke_init :  New tidal mixing case: force rn_emin = 1.e-10 and rmxl_min = 1.e-3 '
+         WRITE(numout,*) '~~~~~~~~~~~~'
+      ENDIF
+# else
       rmxl_min = 1.e-6_wp / ( rn_ediff * SQRT( rn_emin ) )    ! resulting minimum length to recover molecular viscosity
+# endif
       !
       IF(lwp) THEN                    !* Control print