/[MITgcm]/MITgcm/pkg/mom_vecinv/mom_vi_calc_ke.F
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revision 1.1 by adcroft, Fri Mar 30 21:13:33 2001 UTC revision 1.2 by adcroft, Tue May 29 14:01:39 2001 UTC
# Line 0  Line 1 
1    C $Header$
2    C $Name$
3    
4    #include "CPP_OPTIONS.h"
5    
6          SUBROUTINE MOM_VI_CALC_KE(
7         I        bi,bj,k,
8         I        uFld, vFld,
9         O        KE,
10         I        myThid)
11          IMPLICIT NONE
12    C
13    C     Calculate Kinetic Energy, KE, with units (m/s)^2
14    C       - assumes hydrostatic formulation only
15    C
16    
17    C     == Global variables ==
18    #include "SIZE.h"
19    #include "GRID.h"
20    
21    C     == Routine arguments ==
22          INTEGER bi,bj,k
23          _RL uFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
24          _RL vFld(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
25          _RL KE(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
26          INTEGER myThid
27    
28    C     == Local variables ==
29          INTEGER I,J
30    
31          DO J=1-OLy,sNy+OLy-1
32           DO I=1-OLx,sNx+OLx-1
33    
34    C       This defn of KE should not ever be used. Just to let you know.
35    C                            2       2
36    C                 1  /  ___I    ___J   \
37    C           KE = --- |   U    +  V     |
38    C                 2  \                 /
39    C
40    c       KE(i,j) = 0.125*(
41    c    &      ( uFld(i,j)+uFld(i+1, j ) )**2
42    c    &     +( vFld(i,j)+vFld( i ,j+1) )**2 )
43    
44    C       This defn of KE should be used for the vector invariant equations.
45    C                       _____I  _____J
46    C                 1  /     2       2   \
47    C           KE = --- |   U    +  V     |
48    C                 2  \                 /
49    C
50            KE(i,j) = 0.25*(
51         &       uFld( i , j )*uFld( i , j )
52         &      +uFld(i+1, j )*uFld(i+1, j )
53         &      +vFld( i , j )*vFld( i , j )
54         &      +vFld( i ,j+1)*vFld( i ,j+1) )
55    
56    C       As above but including the lopping factors and should be used
57    C       for the conservative form of the momentum equations.
58    c       KE(i,j) = 0.25*(
59    c    &       uFld( i , j )*uFld( i , j )*hFacW(i,j,k,bi,bj)
60    c    &      +uFld(i+1, j )*uFld(i+1, j )*hFacW(i+1,j,k,bi,bj)
61    c    &      +vFld( i , j )*vFld( i , j )*hFacS(i,j,k,bi,bj)
62    c    &      +vFld( i ,j+1)*vFld( i ,j+1)*hFacS(i,j+1,k,bi,bj)
63    c    &        )
64    c    &         *recip_hFacC(i,j,k,bi,bj)
65    
66           ENDDO
67          ENDDO
68    
69          RETURN
70          END
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