/[MITgcm]/MITgcm/pkg/mom_common/mom_calc_visc.F
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Revision 1.28 - (hide annotations) (download)
Thu Oct 11 13:22:00 2007 UTC (16 years, 8 months ago) by mlosch
Branch: MAIN
CVS Tags: checkpoint59i
Changes since 1.27: +12 -19 lines
reorganize some if-statements and replace some powers by
multiplication thus speeding up the code by 30%, again thanks to
Jens-Olaf Beismann

1 mlosch 1.28 C $Header: /u/gcmpack/MITgcm/pkg/mom_common/mom_calc_visc.F,v 1.27 2007/08/16 02:20:40 jmc Exp $
2 jmc 1.14 C $Name: $
3 baylor 1.1
4     #include "MOM_COMMON_OPTIONS.h"
5    
6 baylor 1.5
7 baylor 1.1 SUBROUTINE MOM_CALC_VISC(
8     I bi,bj,k,
9     O viscAh_Z,viscAh_D,viscA4_Z,viscA4_D,
10     O harmonic,biharmonic,useVariableViscosity,
11 jmc 1.12 I hDiv,vort3,tension,strain,KE,hFacZ,
12 baylor 1.1 I myThid)
13    
14     IMPLICIT NONE
15 baylor 1.5 C
16     C Calculate horizontal viscosities (L is typical grid width)
17     C harmonic viscosity=
18     C viscAh (or viscAhD on div pts and viscAhZ on zeta pts)
19     C +0.25*L**2*viscAhGrid/deltaT
20 baylor 1.17 C +sqrt((viscC2leith/pi)**6*grad(Vort3)**2
21     C +(viscC2leithD/pi)**6*grad(hDiv)**2)*L**3
22 baylor 1.5 C +(viscC2smag/pi)**2*L**2*sqrt(Tension**2+Strain**2)
23     C
24     C biharmonic viscosity=
25     C viscA4 (or viscA4D on div pts and viscA4Z on zeta pts)
26     C +0.25*0.125*L**4*viscA4Grid/deltaT (approx)
27 baylor 1.17 C +0.125*L**5*sqrt((viscC4leith/pi)**6*grad(Vort3)**2
28     C +(viscC4leithD/pi)**6*grad(hDiv)**2)
29 baylor 1.5 C +0.125*L**4*(viscC4smag/pi)**2*sqrt(Tension**2+Strain**2)
30     C
31     C Note that often 0.125*L**2 is the scale between harmonic and
32     C biharmonic (see Griffies and Hallberg (2000))
33     C This allows the same value of the coefficient to be used
34     C for roughly similar results with biharmonic and harmonic
35     C
36     C LIMITERS -- limit min and max values of viscosities
37     C viscAhRemax is min value for grid point harmonic Reynolds num
38 baylor 1.9 C harmonic viscosity>sqrt(2*KE)*L/viscAhRemax
39 baylor 1.5 C
40     C viscA4Remax is min value for grid point biharmonic Reynolds num
41 baylor 1.9 C biharmonic viscosity>sqrt(2*KE)*L**3/8/viscA4Remax
42 baylor 1.5 C
43     C viscAhgridmax is CFL stability limiter for harmonic viscosity
44     C harmonic viscosity<0.25*viscAhgridmax*L**2/deltaT
45     C
46     C viscA4gridmax is CFL stability limiter for biharmonic viscosity
47     C biharmonic viscosity<viscA4gridmax*L**4/32/deltaT (approx)
48     C
49     C viscAhgridmin and viscA4gridmin are lower limits for viscosity:
50 cnh 1.25 C harmonic viscosity>0.25*viscAhgridmin*L**2/deltaT
51     C biharmonic viscosity>viscA4gridmin*L**4/32/deltaT (approx)
52    
53    
54 baylor 1.5 C
55     C RECOMMENDED VALUES
56 baylor 1.18 C viscC2Leith=1-3
57     C viscC2LeithD=1-3
58     C viscC4Leith=1-3
59     C viscC4LeithD=1.5-3
60 baylor 1.5 C viscC2smag=2.2-4 (Griffies and Hallberg,2000)
61     C 0.2-0.9 (Smagorinsky,1993)
62     C viscC4smag=2.2-4 (Griffies and Hallberg,2000)
63 baylor 1.9 C viscAhRemax>=1, (<2 suppresses a computational mode)
64     C viscA4Remax>=1, (<2 suppresses a computational mode)
65 baylor 1.5 C viscAhgridmax=1
66     C viscA4gridmax=1
67     C viscAhgrid<1
68     C viscA4grid<1
69     C viscAhgridmin<<1
70     C viscA4gridmin<<1
71 baylor 1.1
72     C == Global variables ==
73     #include "SIZE.h"
74     #include "GRID.h"
75     #include "EEPARAMS.h"
76     #include "PARAMS.h"
77 baylor 1.23 #ifdef ALLOW_NONHYDROSTATIC
78     #include "NH_VARS.h"
79     #endif
80 baylor 1.1
81     C == Routine arguments ==
82     INTEGER bi,bj,k
83     _RL viscAh_Z(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
84     _RL viscAh_D(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
85     _RL viscA4_Z(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
86     _RL viscA4_D(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
87     _RL hDiv(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
88     _RL vort3(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
89     _RL tension(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
90     _RL strain(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
91     _RL KE(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
92     _RS hFacZ(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
93     INTEGER myThid
94     LOGICAL harmonic,biharmonic,useVariableViscosity
95    
96     C == Local variables ==
97     INTEGER I,J
98 baylor 1.23 INTEGER kp1
99 baylor 1.5 _RL smag2fac, smag4fac
100 baylor 1.17 _RL leith2fac, leith4fac
101     _RL leithD2fac, leithD4fac
102 baylor 1.6 _RL viscAhRe_max, viscA4Re_max
103 jmc 1.15 _RL Alin,grdVrt,grdDiv, keZpt
104 baylor 1.1 _RL recip_dt,L2,L3,L4,L5,L2rdt,L4rdt
105 baylor 1.5 _RL Uscl,U4scl
106 jmc 1.16 _RL divDx(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
107     _RL divDy(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
108 jmc 1.20 _RL vrtDx(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
109     _RL vrtDy(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
110 baylor 1.5 _RL viscAh_ZMax(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
111     _RL viscAh_DMax(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
112     _RL viscA4_ZMax(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
113     _RL viscA4_DMax(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
114     _RL viscAh_ZMin(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
115     _RL viscAh_DMin(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
116     _RL viscA4_ZMin(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
117     _RL viscA4_DMin(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
118     _RL viscAh_ZLth(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
119     _RL viscAh_DLth(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
120     _RL viscA4_ZLth(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
121     _RL viscA4_DLth(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
122     _RL viscAh_ZLthD(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
123     _RL viscAh_DLthD(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
124     _RL viscA4_ZLthD(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
125     _RL viscA4_DLthD(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
126     _RL viscAh_ZSmg(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
127     _RL viscAh_DSmg(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
128     _RL viscA4_ZSmg(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
129     _RL viscA4_DSmg(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
130     LOGICAL calcLeith,calcSmag
131 baylor 1.1
132     useVariableViscosity=
133     & (viscAhGrid.NE.0.)
134     & .OR.(viscA4Grid.NE.0.)
135     & .OR.(viscC2leith.NE.0.)
136     & .OR.(viscC2leithD.NE.0.)
137     & .OR.(viscC4leith.NE.0.)
138     & .OR.(viscC4leithD.NE.0.)
139     & .OR.(viscC2smag.NE.0.)
140     & .OR.(viscC4smag.NE.0.)
141    
142     harmonic=
143     & (viscAh.NE.0.)
144     & .OR.(viscAhD.NE.0.)
145     & .OR.(viscAhZ.NE.0.)
146     & .OR.(viscAhGrid.NE.0.)
147     & .OR.(viscC2leith.NE.0.)
148     & .OR.(viscC2leithD.NE.0.)
149     & .OR.(viscC2smag.NE.0.)
150    
151 baylor 1.9 IF ((harmonic).and.(viscAhremax.ne.0.)) THEN
152 jmc 1.10 viscAhre_max=sqrt(2. _d 0)/viscAhRemax
153 baylor 1.9 ELSE
154 jmc 1.10 viscAhre_max=0. _d 0
155 baylor 1.9 ENDIF
156 baylor 1.5
157 baylor 1.1 biharmonic=
158     & (viscA4.NE.0.)
159     & .OR.(viscA4D.NE.0.)
160     & .OR.(viscA4Z.NE.0.)
161     & .OR.(viscA4Grid.NE.0.)
162     & .OR.(viscC4leith.NE.0.)
163     & .OR.(viscC4leithD.NE.0.)
164     & .OR.(viscC4smag.NE.0.)
165    
166 baylor 1.9 IF ((biharmonic).and.(viscA4remax.ne.0.)) THEN
167 jmc 1.10 viscA4re_max=0.125 _d 0*sqrt(2. _d 0)/viscA4Remax
168 baylor 1.9 ELSE
169 jmc 1.10 viscA4re_max=0. _d 0
170 baylor 1.9 ENDIF
171 baylor 1.5
172     calcleith=
173     & (viscC2leith.NE.0.)
174     & .OR.(viscC2leithD.NE.0.)
175     & .OR.(viscC4leith.NE.0.)
176     & .OR.(viscC4leithD.NE.0.)
177    
178     calcsmag=
179     & (viscC2smag.NE.0.)
180     & .OR.(viscC4smag.NE.0.)
181    
182 baylor 1.1 IF (deltaTmom.NE.0.) THEN
183 jmc 1.10 recip_dt=1. _d 0/deltaTmom
184 baylor 1.1 ELSE
185 jmc 1.10 recip_dt=0. _d 0
186 baylor 1.1 ENDIF
187    
188 baylor 1.5 IF (calcsmag) THEN
189     smag2fac=(viscC2smag/pi)**2
190 jmc 1.10 smag4fac=0.125 _d 0*(viscC4smag/pi)**2
191 baylor 1.9 ELSE
192 jmc 1.10 smag2fac=0. _d 0
193     smag4fac=0. _d 0
194 baylor 1.5 ENDIF
195 baylor 1.1
196 baylor 1.17 IF (calcleith) THEN
197     IF (useFullLeith) THEN
198 baylor 1.19 leith2fac =(viscC2leith /pi)**6
199 baylor 1.17 leithD2fac=(viscC2leithD/pi)**6
200 baylor 1.19 leith4fac =0.015625 _d 0*(viscC4leith /pi)**6
201 baylor 1.17 leithD4fac=0.015625 _d 0*(viscC4leithD/pi)**6
202     ELSE
203 baylor 1.19 leith2fac =(viscC2leith /pi)**3
204 baylor 1.17 leithD2fac=(viscC2leithD/pi)**3
205 baylor 1.19 leith4fac =0.125 _d 0*(viscC4leith /pi)**3
206     leithD4fac=0.125 _d 0*(viscC4leithD/pi)**3
207 baylor 1.17 ENDIF
208     ELSE
209     leith2fac=0. _d 0
210     leith4fac=0. _d 0
211     leithD2fac=0. _d 0
212     leithD4fac=0. _d 0
213     ENDIF
214    
215 heimbach 1.21 #ifdef ALLOW_AUTODIFF_TAMC
216 heimbach 1.22 IF ( calcLeith .OR. calcSmag ) THEN
217     STOP 'calcLeith or calcSmag not implemented for ADJOINT'
218     ENDIF
219 mlosch 1.24 #endif
220 heimbach 1.22 DO j=1-Oly,sNy+Oly
221 heimbach 1.21 DO i=1-Olx,sNx+Olx
222     viscAh_D(i,j)=viscAhD
223     viscAh_Z(i,j)=viscAhZ
224     viscA4_D(i,j)=viscA4D
225     viscA4_Z(i,j)=viscA4Z
226     c
227     visca4_zsmg(i,j) = 0. _d 0
228     viscah_zsmg(i,j) = 0. _d 0
229     c
230     viscAh_Dlth(i,j) = 0. _d 0
231     viscA4_Dlth(i,j) = 0. _d 0
232     viscAh_DlthD(i,j)= 0. _d 0
233     viscA4_DlthD(i,j)= 0. _d 0
234     c
235     viscAh_DSmg(i,j) = 0. _d 0
236     viscA4_DSmg(i,j) = 0. _d 0
237     c
238     viscAh_ZLth(i,j) = 0. _d 0
239     viscA4_ZLth(i,j) = 0. _d 0
240     viscAh_ZLthD(i,j)= 0. _d 0
241     viscA4_ZLthD(i,j)= 0. _d 0
242     ENDDO
243 heimbach 1.22 ENDDO
244 heimbach 1.21
245 baylor 1.1 C - Viscosity
246     IF (useVariableViscosity) THEN
247 jmc 1.16
248 jmc 1.20 C- Initialise to zero gradient of vorticity & divergence:
249 jmc 1.16 DO j=1-Oly,sNy+Oly
250     DO i=1-Olx,sNx+Olx
251     divDx(i,j) = 0.
252     divDy(i,j) = 0.
253 jmc 1.20 vrtDx(i,j) = 0.
254     vrtDy(i,j) = 0.
255 jmc 1.16 ENDDO
256     ENDDO
257 jmc 1.20
258 jmc 1.16 IF (calcleith) THEN
259 jmc 1.20 C horizontal gradient of horizontal divergence:
260    
261 jmc 1.16 C- gradient in x direction:
262 heimbach 1.26 cph-exch2#ifndef ALLOW_AUTODIFF_TAMC
263 jmc 1.16 IF (useCubedSphereExchange) THEN
264     C to compute d/dx(hDiv), fill corners with appropriate values:
265 jmc 1.27 CALL FILL_CS_CORNER_TR_RL( .TRUE., .FALSE.,
266     & hDiv, bi,bj, myThid )
267 jmc 1.16 ENDIF
268 heimbach 1.26 cph-exch2#endif
269 jmc 1.16 DO j=2-Oly,sNy+Oly-1
270     DO i=2-Olx,sNx+Olx-1
271     divDx(i,j) = (hDiv(i,j)-hDiv(i-1,j))*recip_DXC(i,j,bi,bj)
272     ENDDO
273     ENDDO
274    
275     C- gradient in y direction:
276 heimbach 1.26 cph-exch2#ifndef ALLOW_AUTODIFF_TAMC
277 jmc 1.16 IF (useCubedSphereExchange) THEN
278     C to compute d/dy(hDiv), fill corners with appropriate values:
279 jmc 1.27 CALL FILL_CS_CORNER_TR_RL(.FALSE., .FALSE.,
280     & hDiv, bi,bj, myThid )
281 jmc 1.16 ENDIF
282 heimbach 1.26 cph-exch2#endif
283 jmc 1.16 DO j=2-Oly,sNy+Oly-1
284     DO i=2-Olx,sNx+Olx-1
285     divDy(i,j) = (hDiv(i,j)-hDiv(i,j-1))*recip_DYC(i,j,bi,bj)
286     ENDDO
287     ENDDO
288 jmc 1.20
289     C horizontal gradient of vertical vorticity:
290     C- gradient in x direction:
291     DO j=2-Oly,sNy+Oly
292     DO i=2-Olx,sNx+Olx-1
293     vrtDx(i,j) = (vort3(i+1,j)-vort3(i,j))
294     & *recip_DXG(i,j,bi,bj)
295     & *maskS(i,j,k,bi,bj)
296     ENDDO
297     ENDDO
298     C- gradient in y direction:
299     DO j=2-Oly,sNy+Oly-1
300     DO i=2-Olx,sNx+Olx
301     vrtDy(i,j) = (vort3(i,j+1)-vort3(i,j))
302     & *recip_DYG(i,j,bi,bj)
303     & *maskW(i,j,k,bi,bj)
304     ENDDO
305     ENDDO
306    
307 jmc 1.16 ENDIF
308    
309 baylor 1.1 DO j=2-Oly,sNy+Oly-1
310     DO i=2-Olx,sNx+Olx-1
311     CCCCCCCCCCCCCCC Divergence Point CalculationsCCCCCCCCCCCCCCCCCCCC
312 baylor 1.5
313 baylor 1.1 C These are (powers of) length scales
314 baylor 1.11 IF (useAreaViscLength) THEN
315 jmc 1.12 L2=rA(i,j,bi,bj)
316 mlosch 1.28 L4rdt=0.03125 _d 0*recip_dt*L2**2
317 baylor 1.11 ELSE
318     L2=2. _d 0/((recip_DXF(I,J,bi,bj)**2+recip_DYF(I,J,bi,bj)**2))
319 mlosch 1.28 L4rdt=recip_dt/( 6. _d 0*(recip_DXF(I,J,bi,bj)**4
320     & +recip_DYF(I,J,bi,bj)**4)
321     & +8. _d 0*((recip_DXF(I,J,bi,bj)
322     & *recip_DYF(I,J,bi,bj))**2) )
323 baylor 1.11 ENDIF
324 baylor 1.1 L3=(L2**1.5)
325     L4=(L2**2)
326 mlosch 1.28 L5=(L2*L3)
327 baylor 1.5
328 jmc 1.10 L2rdt=0.25 _d 0*recip_dt*L2
329 baylor 1.5
330     C Velocity Reynolds Scale
331 jmc 1.15 IF ( viscAhRe_max.GT.0. .AND. KE(i,j).GT.0. ) THEN
332     Uscl=sqrt(KE(i,j)*L2)*viscAhRe_max
333     ELSE
334     Uscl=0.
335     ENDIF
336     IF ( viscA4Re_max.GT.0. .AND. KE(i,j).GT.0. ) THEN
337     U4scl=sqrt(KE(i,j))*L3*viscA4Re_max
338     ELSE
339     U4scl=0.
340     ENDIF
341 baylor 1.5
342 heimbach 1.22 #ifndef ALLOW_AUTODIFF_TAMC
343 baylor 1.5 IF (useFullLeith.and.calcleith) THEN
344 baylor 1.1 C This is the vector magnitude of the vorticity gradient squared
345 jmc 1.20 grdVrt=0.25 _d 0*( (vrtDx(i,j+1)*vrtDx(i,j+1)
346     & + vrtDx(i,j)*vrtDx(i,j) )
347     & + (vrtDy(i+1,j)*vrtDy(i+1,j)
348     & + vrtDy(i,j)*vrtDy(i,j) ) )
349 baylor 1.1
350     C This is the vector magnitude of grad (div.v) squared
351     C Using it in Leith serves to damp instabilities in w.
352 jmc 1.16 grdDiv=0.25 _d 0*( (divDx(i+1,j)*divDx(i+1,j)
353     & + divDx(i,j)*divDx(i,j) )
354     & + (divDy(i,j+1)*divDy(i,j+1)
355     & + divDy(i,j)*divDy(i,j) ) )
356 baylor 1.5
357     viscAh_DLth(i,j)=
358 baylor 1.17 & sqrt(leith2fac*grdVrt+leithD2fac*grdDiv)*L3
359     viscA4_DLth(i,j)=
360     & sqrt(leith4fac*grdVrt+leithD4fac*grdDiv)*L5
361 baylor 1.5 viscAh_DLthd(i,j)=
362 baylor 1.17 & sqrt(leithD2fac*grdDiv)*L3
363     viscA4_DLthd(i,j)=
364     & sqrt(leithD4fac*grdDiv)*L5
365 baylor 1.5 ELSEIF (calcleith) THEN
366 baylor 1.1 C but this approximation will work on cube
367     c (and differs by as much as 4X)
368 jmc 1.20 grdVrt=max( abs(vrtDx(i,j+1)), abs(vrtDx(i,j)) )
369     grdVrt=max( grdVrt, abs(vrtDy(i+1,j)) )
370     grdVrt=max( grdVrt, abs(vrtDy(i,j)) )
371 baylor 1.5
372 jmc 1.20 c This approximation is good to the same order as above...
373 jmc 1.16 grdDiv=max( abs(divDx(i+1,j)), abs(divDx(i,j)) )
374     grdDiv=max( grdDiv, abs(divDy(i,j+1)) )
375     grdDiv=max( grdDiv, abs(divDy(i,j)) )
376 baylor 1.1
377 baylor 1.17 viscAh_Dlth(i,j)=(leith2fac*grdVrt+(leithD2fac*grdDiv))*L3
378     viscA4_Dlth(i,j)=(leith4fac*grdVrt+(leithD4fac*grdDiv))*L5
379     viscAh_DlthD(i,j)=((leithD2fac*grdDiv))*L3
380     viscA4_DlthD(i,j)=((leithD4fac*grdDiv))*L5
381 baylor 1.1 ELSE
382 jmc 1.10 viscAh_Dlth(i,j)=0. _d 0
383     viscA4_Dlth(i,j)=0. _d 0
384     viscAh_DlthD(i,j)=0. _d 0
385     viscA4_DlthD(i,j)=0. _d 0
386 baylor 1.1 ENDIF
387    
388 baylor 1.5 IF (calcsmag) THEN
389     viscAh_DSmg(i,j)=L2
390     & *sqrt(tension(i,j)**2
391 jmc 1.10 & +0.25 _d 0*(strain(i+1, j )**2+strain( i ,j+1)**2
392     & +strain(i , j )**2+strain(i+1,j+1)**2))
393 baylor 1.5 viscA4_DSmg(i,j)=smag4fac*L2*viscAh_DSmg(i,j)
394     viscAh_DSmg(i,j)=smag2fac*viscAh_DSmg(i,j)
395 baylor 1.1 ELSE
396 jmc 1.10 viscAh_DSmg(i,j)=0. _d 0
397     viscA4_DSmg(i,j)=0. _d 0
398 baylor 1.1 ENDIF
399 heimbach 1.22 #endif /* ALLOW_AUTODIFF_TAMC */
400 baylor 1.1
401     C Harmonic on Div.u points
402 baylor 1.5 Alin=viscAhD+viscAhGrid*L2rdt
403     & +viscAh_DLth(i,j)+viscAh_DSmg(i,j)
404     viscAh_DMin(i,j)=max(viscAhGridMin*L2rdt,Uscl)
405     viscAh_D(i,j)=max(viscAh_DMin(i,j),Alin)
406     viscAh_DMax(i,j)=min(viscAhGridMax*L2rdt,viscAhMax)
407     viscAh_D(i,j)=min(viscAh_DMax(i,j),viscAh_D(i,j))
408 baylor 1.1
409     C BiHarmonic on Div.u points
410 baylor 1.5 Alin=viscA4D+viscA4Grid*L4rdt
411     & +viscA4_DLth(i,j)+viscA4_DSmg(i,j)
412     viscA4_DMin(i,j)=max(viscA4GridMin*L4rdt,U4scl)
413     viscA4_D(i,j)=max(viscA4_DMin(i,j),Alin)
414     viscA4_DMax(i,j)=min(viscA4GridMax*L4rdt,viscA4Max)
415     viscA4_D(i,j)=min(viscA4_DMax(i,j),viscA4_D(i,j))
416 baylor 1.1
417 jmc 1.27 #ifdef ALLOW_NONHYDROSTATIC
418 baylor 1.23 C /* Pass Viscosities to calc_gw, if constant, not necessary */
419    
420     kp1 = MIN(k+1,Nr)
421    
422     if (k .eq. 1) then
423     viscAh_W(i,j,kp1,bi,bj)=0.5*viscAh_D(i,j)
424     viscA4_W(i,j,kp1,bi,bj)=0.5*viscA4_D(i,j)
425    
426 jmc 1.27 C /* These values dont get used */
427     viscAh_W(i,j,k,bi,bj)=viscAh_D(i,j)
428 baylor 1.23 viscA4_W(i,j,k,bi,bj)=viscA4_D(i,j)
429     else
430     C Note that previous call of this function has already added half.
431     viscAh_W(i,j,kp1,bi,bj)=0.5*viscAh_D(i,j)
432     viscA4_W(i,j,kp1,bi,bj)=0.5*viscA4_D(i,j)
433    
434     viscAh_W(i,j,k,bi,bj)=viscAh_W(i,j,k,bi,bj)+0.5*viscAh_D(i,j)
435     viscA4_W(i,j,k,bi,bj)=viscA4_W(i,j,k,bi,bj)+0.5*viscA4_D(i,j)
436     endif
437     #endif /* ALLOW_NONHYDROSTATIC */
438    
439 baylor 1.1 CCCCCCCCCCCCC Vorticity Point CalculationsCCCCCCCCCCCCCCCCCC
440     C These are (powers of) length scales
441 baylor 1.11 IF (useAreaViscLength) THEN
442 jmc 1.12 L2=rAz(i,j,bi,bj)
443 mlosch 1.28 L4rdt=0.125 _d 0*recip_dt*rAz(i,j,bi,bj)**2
444 baylor 1.11 ELSE
445 jmc 1.12 L2=2. _d 0/((recip_DXV(I,J,bi,bj)**2+recip_DYU(I,J,bi,bj)**2))
446 mlosch 1.28 L4rdt=recip_dt/
447     & ( 6. _d 0*(recip_DXV(I,J,bi,bj)**4+recip_DYU(I,J,bi,bj)**4)
448     & +8. _d 0*((recip_DXV(I,J,bi,bj)*recip_DYU(I,J,bi,bj))**2))
449 baylor 1.11 ENDIF
450    
451 baylor 1.1 L3=(L2**1.5)
452     L4=(L2**2)
453 mlosch 1.28 L5=(L2*L3)
454 baylor 1.5
455 jmc 1.10 L2rdt=0.25 _d 0*recip_dt*L2
456 baylor 1.5
457 jmc 1.15 C Velocity Reynolds Scale (Pb here at CS-grid corners !)
458     IF ( viscAhRe_max.GT.0. .OR. viscA4Re_max.GT.0. ) THEN
459     keZpt=0.25 _d 0*( (KE(i,j)+KE(i-1,j-1))
460     & +(KE(i-1,j)+KE(i,j-1)) )
461     IF ( keZpt.GT.0. ) THEN
462     Uscl = sqrt(keZpt*L2)*viscAhRe_max
463     U4scl= sqrt(keZpt)*L3*viscA4Re_max
464     ELSE
465     Uscl =0.
466     U4scl=0.
467     ENDIF
468     ELSE
469     Uscl =0.
470     U4scl=0.
471     ENDIF
472 baylor 1.1
473 heimbach 1.22 #ifndef ALLOW_AUTODIFF_TAMC
474 baylor 1.1 C This is the vector magnitude of the vorticity gradient squared
475 baylor 1.5 IF (useFullLeith.and.calcleith) THEN
476 jmc 1.20 grdVrt=0.25 _d 0*( (vrtDx(i-1,j)*vrtDx(i-1,j)
477     & + vrtDx(i,j)*vrtDx(i,j) )
478     & + (vrtDy(i,j-1)*vrtDy(i,j-1)
479     & + vrtDy(i,j)*vrtDy(i,j) ) )
480 baylor 1.1
481     C This is the vector magnitude of grad(div.v) squared
482 jmc 1.16 grdDiv=0.25 _d 0*( (divDx(i,j-1)*divDx(i,j-1)
483     & + divDx(i,j)*divDx(i,j) )
484     & + (divDy(i-1,j)*divDy(i-1,j)
485     & + divDy(i,j)*divDy(i,j) ) )
486 baylor 1.5
487     viscAh_ZLth(i,j)=
488 baylor 1.17 & sqrt(leith2fac*grdVrt+leithD2fac*grdDiv)*L3
489     viscA4_ZLth(i,j)=
490     & sqrt(leith4fac*grdVrt+leithD4fac*grdDiv)*L5
491 baylor 1.5 viscAh_ZLthD(i,j)=
492 baylor 1.17 & sqrt(leithD2fac*grdDiv)*L3
493     viscA4_ZLthD(i,j)=
494     & sqrt(leithD4fac*grdDiv)*L5
495 baylor 1.5
496     ELSEIF (calcleith) THEN
497 baylor 1.1 C but this approximation will work on cube (and differs by 4X)
498 jmc 1.20 grdVrt=max( abs(vrtDx(i-1,j)), abs(vrtDx(i,j)) )
499     grdVrt=max( grdVrt, abs(vrtDy(i,j-1)) )
500     grdVrt=max( grdVrt, abs(vrtDy(i,j)) )
501 baylor 1.5
502 jmc 1.16 grdDiv=max( abs(divDx(i,j)), abs(divDx(i,j-1)) )
503     grdDiv=max( grdDiv, abs(divDy(i,j)) )
504     grdDiv=max( grdDiv, abs(divDy(i-1,j)) )
505 baylor 1.5
506 baylor 1.17 viscAh_ZLth(i,j)=(leith2fac*grdVrt+(leithD2fac*grdDiv))*L3
507     viscA4_ZLth(i,j)=(leith4fac*grdVrt+(leithD4fac*grdDiv))*L5
508     viscAh_ZLthD(i,j)=(leithD2fac*grdDiv)*L3
509     viscA4_ZLthD(i,j)=(leithD4fac*grdDiv)*L5
510 baylor 1.1 ELSE
511 jmc 1.10 viscAh_ZLth(i,j)=0. _d 0
512     viscA4_ZLth(i,j)=0. _d 0
513     viscAh_ZLthD(i,j)=0. _d 0
514     viscA4_ZLthD(i,j)=0. _d 0
515 baylor 1.1 ENDIF
516    
517 baylor 1.5 IF (calcsmag) THEN
518     viscAh_ZSmg(i,j)=L2
519     & *sqrt(strain(i,j)**2
520 jmc 1.10 & +0.25 _d 0*(tension( i , j )**2+tension( i ,j-1)**2
521     & +tension(i-1, j )**2+tension(i-1,j-1)**2))
522 baylor 1.5 viscA4_ZSmg(i,j)=smag4fac*L2*viscAh_ZSmg(i,j)
523     viscAh_ZSmg(i,j)=smag2fac*viscAh_ZSmg(i,j)
524 baylor 1.1 ENDIF
525 heimbach 1.22 #endif /* ALLOW_AUTODIFF_TAMC */
526 baylor 1.1
527     C Harmonic on Zeta points
528 baylor 1.5 Alin=viscAhZ+viscAhGrid*L2rdt
529     & +viscAh_ZLth(i,j)+viscAh_ZSmg(i,j)
530     viscAh_ZMin(i,j)=max(viscAhGridMin*L2rdt,Uscl)
531     viscAh_Z(i,j)=max(viscAh_ZMin(i,j),Alin)
532     viscAh_ZMax(i,j)=min(viscAhGridMax*L2rdt,viscAhMax)
533     viscAh_Z(i,j)=min(viscAh_ZMax(i,j),viscAh_Z(i,j))
534    
535     C BiHarmonic on Zeta points
536     Alin=viscA4Z+viscA4Grid*L4rdt
537     & +viscA4_ZLth(i,j)+viscA4_ZSmg(i,j)
538     viscA4_ZMin(i,j)=max(viscA4GridMin*L4rdt,U4scl)
539     viscA4_Z(i,j)=max(viscA4_ZMin(i,j),Alin)
540     viscA4_ZMax(i,j)=min(viscA4GridMax*L4rdt,viscA4Max)
541     viscA4_Z(i,j)=min(viscA4_ZMax(i,j),viscA4_Z(i,j))
542 baylor 1.1 ENDDO
543     ENDDO
544     ELSE
545     DO j=1-Oly,sNy+Oly
546     DO i=1-Olx,sNx+Olx
547     viscAh_D(i,j)=viscAhD
548     viscAh_Z(i,j)=viscAhZ
549     viscA4_D(i,j)=viscA4D
550     viscA4_Z(i,j)=viscA4Z
551     ENDDO
552     ENDDO
553     ENDIF
554    
555     #ifdef ALLOW_DIAGNOSTICS
556     IF (useDiagnostics) THEN
557     CALL DIAGNOSTICS_FILL(viscAh_D,'VISCAHD ',k,1,2,bi,bj,myThid)
558     CALL DIAGNOSTICS_FILL(viscA4_D,'VISCA4D ',k,1,2,bi,bj,myThid)
559     CALL DIAGNOSTICS_FILL(viscAh_Z,'VISCAHZ ',k,1,2,bi,bj,myThid)
560     CALL DIAGNOSTICS_FILL(viscA4_Z,'VISCA4Z ',k,1,2,bi,bj,myThid)
561 baylor 1.23 #ifdef ALLOW_NONHYDROSTATIC
562     CALL DIAGNOSTICS_FILL(viscAh_W,'VISCAHW ',k,1,2,bi,bj,myThid)
563     CALL DIAGNOSTICS_FILL(viscA4_W,'VISCA4W ',k,1,2,bi,bj,myThid)
564     #endif
565 baylor 1.5
566     CALL DIAGNOSTICS_FILL(viscAh_DMax,'VAHDMAX ',k,1,2,bi,bj,myThid)
567     CALL DIAGNOSTICS_FILL(viscA4_DMax,'VA4DMAX ',k,1,2,bi,bj,myThid)
568     CALL DIAGNOSTICS_FILL(viscAh_ZMax,'VAHZMAX ',k,1,2,bi,bj,myThid)
569     CALL DIAGNOSTICS_FILL(viscA4_ZMax,'VA4ZMAX ',k,1,2,bi,bj,myThid)
570    
571     CALL DIAGNOSTICS_FILL(viscAh_DMin,'VAHDMIN ',k,1,2,bi,bj,myThid)
572     CALL DIAGNOSTICS_FILL(viscA4_DMin,'VA4DMIN ',k,1,2,bi,bj,myThid)
573     CALL DIAGNOSTICS_FILL(viscAh_ZMin,'VAHZMIN ',k,1,2,bi,bj,myThid)
574     CALL DIAGNOSTICS_FILL(viscA4_ZMin,'VA4ZMIN ',k,1,2,bi,bj,myThid)
575    
576     CALL DIAGNOSTICS_FILL(viscAh_DLth,'VAHDLTH ',k,1,2,bi,bj,myThid)
577     CALL DIAGNOSTICS_FILL(viscA4_DLth,'VA4DLTH ',k,1,2,bi,bj,myThid)
578     CALL DIAGNOSTICS_FILL(viscAh_ZLth,'VAHZLTH ',k,1,2,bi,bj,myThid)
579     CALL DIAGNOSTICS_FILL(viscA4_ZLth,'VA4ZLTH ',k,1,2,bi,bj,myThid)
580    
581 baylor 1.7 CALL DIAGNOSTICS_FILL(viscAh_DLthD,'VAHDLTHD'
582 baylor 1.8 & ,k,1,2,bi,bj,myThid)
583 baylor 1.7 CALL DIAGNOSTICS_FILL(viscA4_DLthD,'VA4DLTHD'
584 baylor 1.8 & ,k,1,2,bi,bj,myThid)
585 baylor 1.7 CALL DIAGNOSTICS_FILL(viscAh_ZLthD,'VAHZLTHD'
586 baylor 1.8 & ,k,1,2,bi,bj,myThid)
587 baylor 1.7 CALL DIAGNOSTICS_FILL(viscA4_ZLthD,'VA4ZLTHD'
588 baylor 1.8 & ,k,1,2,bi,bj,myThid)
589 baylor 1.5
590     CALL DIAGNOSTICS_FILL(viscAh_DSmg,'VAHDSMAG',k,1,2,bi,bj,myThid)
591     CALL DIAGNOSTICS_FILL(viscA4_DSmg,'VA4DSMAG',k,1,2,bi,bj,myThid)
592     CALL DIAGNOSTICS_FILL(viscAh_ZSmg,'VAHZSMAG',k,1,2,bi,bj,myThid)
593     CALL DIAGNOSTICS_FILL(viscA4_ZSmg,'VA4ZSMAG',k,1,2,bi,bj,myThid)
594 baylor 1.1 ENDIF
595     #endif
596    
597     RETURN
598     END
599 baylor 1.5

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