Changes between Version 11 and Version 12 of ticket/0842_TRA_TRP

Timestamp:

2011-08-03T18:54:42+02:00 (10 years ago)

Author:

cetlod

Comment:

—

ticket/0842_TRA_TRP

@@ -31 +31 @@
  * suppression of key_tradmp and replace it by a namelist parameter '''ln_tradmp'''
 
-'''(2)'''  [[BR]]
+'''(2)'''  Re-introduce a horizontal diffusivity coefficient for passive tracers [[BR]]
 
-After the merge of TRA-TRP, we wanted to keep in the system the use of different transport scheme for active & passive tracers. But for lateral diffusion, it's not the case : the diffusive coefficient is only define in the namelist and it is the one which is used both for the active and passive tracers scheme.
+After the merge of TRA-TRP, we wanted to keep in the system the use of different transport scheme for active & passive tracers. But, in nemo_v3_1,  the diffusive coefficient define for T & S are the one used also for the passive tracers.
 
-Because of space varying of those coef - defining in the code by the use of statement function - 
+Because of space varying of those coefficients - defined in the code by the use of statement function -, we need to find a trick to solve that problem in a easier way
 
-The idea is to multiply the existing coef defining in ldftra_substitute by a factor - rldf - which will be equal to
- - 1 for active tracers
- - rn_ahtrc0 / rn_aht0 ( the ratio between passive tracers and active tracers coef.)
-
-In the code, we ensure that the 2 coef have the same sign ( < 0 for bilaplacian operator ; > 0 for laplacian operator )
-
+One solution is to multiply the existing coef defining in ldftra_substitute by a factor - rldf - which will be equal to
 {{{
 #if defined key_traldf_c3d
@@ -58 +53 @@
 #endif
 }}}
+rldf is equal to :
+ - 1 for active tracers
+ - rn_ahtrc0 / rn_aht0 ( the ratio between passive tracers and active tracers coef.)
+
+In the code, we ensure that the 2 coef have the same sign ( < 0 for bilaplacian operator ; > 0 for laplacian operator )
 
 '''(3)''' replace 3D T & S arrays by 4D array TS throughout the code [[BR]]
@@ -142 +142 @@
 
 
-- we merge the two namelists &namdta_tem and &namdta_sal in one &namtsd
-- we add a namelist parameter ln_tsd_init to replace the 2 CPP keys key_dtatem & key_dtasal
+- we merge the two namelists &namdta_tem and &namdta_sal in one &namtsd  and add a new namelist parameter ln_tsd_init to replace the 2 CPP keys key_dtatem & key_dtasal [[BR]]
+
 
 {{{