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Revision 1.32 - (hide annotations) (download)
Mon Mar 24 00:25:31 2008 UTC (16 years, 3 months ago) by jmc
Branch: MAIN
CVS Tags: checkpoint59p
Changes since 1.31: +114 -104 lines
- fix bug in average value of viscAh_W & viscA4_W next to the bottom
  (only used with variable horizontal viscosity and non-hydrostatic).

1 jmc 1.32 C $Header: /u/gcmpack/MITgcm/pkg/mom_common/mom_calc_visc.F,v 1.31 2007/11/14 16:00:33 mlosch 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 jmc 1.32 C viscAhReMax is min value for grid point harmonic Reynolds num
38     C harmonic viscosity>sqrt(2*KE)*L/viscAhReMax
39 baylor 1.5 C
40 jmc 1.32 C viscA4ReMax is min value for grid point biharmonic Reynolds num
41     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 jmc 1.32 C viscC2smag=2.2-4 (Griffies and Hallberg,2000)
61 baylor 1.5 C 0.2-0.9 (Smagorinsky,1993)
62 jmc 1.32 C viscC4smag=2.2-4 (Griffies and Hallberg,2000)
63     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 jmc 1.29 #ifdef ALLOW_NONHYDROSTATIC
99 baylor 1.23 INTEGER kp1
100 jmc 1.29 #endif
101 baylor 1.5 _RL smag2fac, smag4fac
102 baylor 1.17 _RL leith2fac, leith4fac
103     _RL leithD2fac, leithD4fac
104 baylor 1.6 _RL viscAhRe_max, viscA4Re_max
105 jmc 1.15 _RL Alin,grdVrt,grdDiv, keZpt
106 baylor 1.1 _RL recip_dt,L2,L3,L4,L5,L2rdt,L4rdt
107 baylor 1.5 _RL Uscl,U4scl
108 jmc 1.16 _RL divDx(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
109     _RL divDy(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
110 jmc 1.20 _RL vrtDx(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
111     _RL vrtDy(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
112 baylor 1.5 _RL viscAh_ZMax(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
113     _RL viscAh_DMax(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
114     _RL viscA4_ZMax(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
115     _RL viscA4_DMax(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
116     _RL viscAh_ZMin(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
117     _RL viscAh_DMin(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
118     _RL viscA4_ZMin(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
119     _RL viscA4_DMin(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
120     _RL viscAh_ZLth(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
121     _RL viscAh_DLth(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
122     _RL viscA4_ZLth(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
123     _RL viscA4_DLth(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
124     _RL viscAh_ZLthD(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
125     _RL viscAh_DLthD(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
126     _RL viscA4_ZLthD(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
127     _RL viscA4_DLthD(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
128     _RL viscAh_ZSmg(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
129     _RL viscAh_DSmg(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
130     _RL viscA4_ZSmg(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
131     _RL viscA4_DSmg(1-OLx:sNx+OLx,1-OLy:sNy+OLy)
132 jmc 1.32 LOGICAL calcLeith, calcSmag
133 baylor 1.1
134 jmc 1.32 C-- Set flags which are used in this S/R and elsewhere :
135 baylor 1.1 useVariableViscosity=
136     & (viscAhGrid.NE.0.)
137     & .OR.(viscA4Grid.NE.0.)
138     & .OR.(viscC2leith.NE.0.)
139     & .OR.(viscC2leithD.NE.0.)
140     & .OR.(viscC4leith.NE.0.)
141     & .OR.(viscC4leithD.NE.0.)
142     & .OR.(viscC2smag.NE.0.)
143     & .OR.(viscC4smag.NE.0.)
144    
145     harmonic=
146     & (viscAh.NE.0.)
147     & .OR.(viscAhD.NE.0.)
148     & .OR.(viscAhZ.NE.0.)
149     & .OR.(viscAhGrid.NE.0.)
150     & .OR.(viscC2leith.NE.0.)
151     & .OR.(viscC2leithD.NE.0.)
152     & .OR.(viscC2smag.NE.0.)
153    
154     biharmonic=
155     & (viscA4.NE.0.)
156     & .OR.(viscA4D.NE.0.)
157     & .OR.(viscA4Z.NE.0.)
158     & .OR.(viscA4Grid.NE.0.)
159     & .OR.(viscC4leith.NE.0.)
160     & .OR.(viscC4leithD.NE.0.)
161     & .OR.(viscC4smag.NE.0.)
162    
163 jmc 1.32 IF (useVariableViscosity) THEN
164     C---- variable viscosity :
165    
166     IF ((harmonic).AND.(viscAhReMax.NE.0.)) THEN
167     viscAhRe_max=SQRT(2. _d 0)/viscAhReMax
168     ELSE
169     viscAhRe_max=0. _d 0
170     ENDIF
171    
172     IF ((biharmonic).AND.(viscA4ReMax.NE.0.)) THEN
173     viscA4Re_max=0.125 _d 0*SQRT(2. _d 0)/viscA4ReMax
174     ELSE
175     viscA4Re_max=0. _d 0
176     ENDIF
177 baylor 1.5
178 jmc 1.32 calcLeith=
179 baylor 1.5 & (viscC2leith.NE.0.)
180     & .OR.(viscC2leithD.NE.0.)
181     & .OR.(viscC4leith.NE.0.)
182     & .OR.(viscC4leithD.NE.0.)
183    
184 jmc 1.32 calcSmag=
185 baylor 1.5 & (viscC2smag.NE.0.)
186     & .OR.(viscC4smag.NE.0.)
187    
188 jmc 1.32 IF (deltaTmom.NE.0.) THEN
189     recip_dt=1. _d 0/deltaTmom
190     ELSE
191     recip_dt=0. _d 0
192     ENDIF
193 baylor 1.1
194 jmc 1.32 IF (calcSmag) THEN
195 baylor 1.5 smag2fac=(viscC2smag/pi)**2
196 jmc 1.10 smag4fac=0.125 _d 0*(viscC4smag/pi)**2
197 jmc 1.32 ELSE
198 jmc 1.10 smag2fac=0. _d 0
199     smag4fac=0. _d 0
200 jmc 1.32 ENDIF
201 baylor 1.1
202 jmc 1.32 IF (calcLeith) THEN
203 baylor 1.17 IF (useFullLeith) THEN
204 baylor 1.19 leith2fac =(viscC2leith /pi)**6
205 baylor 1.17 leithD2fac=(viscC2leithD/pi)**6
206 baylor 1.19 leith4fac =0.015625 _d 0*(viscC4leith /pi)**6
207 baylor 1.17 leithD4fac=0.015625 _d 0*(viscC4leithD/pi)**6
208     ELSE
209 baylor 1.19 leith2fac =(viscC2leith /pi)**3
210 baylor 1.17 leithD2fac=(viscC2leithD/pi)**3
211 baylor 1.19 leith4fac =0.125 _d 0*(viscC4leith /pi)**3
212     leithD4fac=0.125 _d 0*(viscC4leithD/pi)**3
213 baylor 1.17 ENDIF
214 jmc 1.32 ELSE
215 baylor 1.17 leith2fac=0. _d 0
216     leith4fac=0. _d 0
217     leithD2fac=0. _d 0
218     leithD4fac=0. _d 0
219 jmc 1.32 ENDIF
220 baylor 1.17
221 heimbach 1.21 #ifdef ALLOW_AUTODIFF_TAMC
222 jmc 1.32 IF ( calcLeith .OR. calcSmag ) THEN
223     STOP 'calcLeith or calcSmag not implemented for ADJOINT'
224     ENDIF
225 mlosch 1.24 #endif
226 jmc 1.32 DO j=1-Oly,sNy+Oly
227 heimbach 1.21 DO i=1-Olx,sNx+Olx
228     viscAh_D(i,j)=viscAhD
229     viscAh_Z(i,j)=viscAhZ
230     viscA4_D(i,j)=viscA4D
231     viscA4_Z(i,j)=viscA4Z
232     c
233     visca4_zsmg(i,j) = 0. _d 0
234     viscah_zsmg(i,j) = 0. _d 0
235     c
236     viscAh_Dlth(i,j) = 0. _d 0
237     viscA4_Dlth(i,j) = 0. _d 0
238     viscAh_DlthD(i,j)= 0. _d 0
239     viscA4_DlthD(i,j)= 0. _d 0
240     c
241     viscAh_DSmg(i,j) = 0. _d 0
242     viscA4_DSmg(i,j) = 0. _d 0
243     c
244     viscAh_ZLth(i,j) = 0. _d 0
245     viscA4_ZLth(i,j) = 0. _d 0
246     viscAh_ZLthD(i,j)= 0. _d 0
247     viscA4_ZLthD(i,j)= 0. _d 0
248     ENDDO
249 jmc 1.32 ENDDO
250 jmc 1.16
251 jmc 1.20 C- Initialise to zero gradient of vorticity & divergence:
252 jmc 1.16 DO j=1-Oly,sNy+Oly
253     DO i=1-Olx,sNx+Olx
254     divDx(i,j) = 0.
255     divDy(i,j) = 0.
256 jmc 1.20 vrtDx(i,j) = 0.
257     vrtDy(i,j) = 0.
258 jmc 1.16 ENDDO
259     ENDDO
260 jmc 1.20
261 jmc 1.32 IF (calcLeith) THEN
262 jmc 1.20 C horizontal gradient of horizontal divergence:
263    
264 jmc 1.16 C- gradient in x direction:
265 heimbach 1.26 cph-exch2#ifndef ALLOW_AUTODIFF_TAMC
266 jmc 1.16 IF (useCubedSphereExchange) THEN
267     C to compute d/dx(hDiv), fill corners with appropriate values:
268 jmc 1.27 CALL FILL_CS_CORNER_TR_RL( .TRUE., .FALSE.,
269     & hDiv, bi,bj, myThid )
270 jmc 1.16 ENDIF
271 heimbach 1.26 cph-exch2#endif
272 jmc 1.16 DO j=2-Oly,sNy+Oly-1
273     DO i=2-Olx,sNx+Olx-1
274     divDx(i,j) = (hDiv(i,j)-hDiv(i-1,j))*recip_DXC(i,j,bi,bj)
275     ENDDO
276     ENDDO
277    
278     C- gradient in y direction:
279 heimbach 1.26 cph-exch2#ifndef ALLOW_AUTODIFF_TAMC
280 jmc 1.16 IF (useCubedSphereExchange) THEN
281     C to compute d/dy(hDiv), fill corners with appropriate values:
282 jmc 1.27 CALL FILL_CS_CORNER_TR_RL(.FALSE., .FALSE.,
283     & hDiv, bi,bj, myThid )
284 jmc 1.16 ENDIF
285 heimbach 1.26 cph-exch2#endif
286 jmc 1.16 DO j=2-Oly,sNy+Oly-1
287     DO i=2-Olx,sNx+Olx-1
288     divDy(i,j) = (hDiv(i,j)-hDiv(i,j-1))*recip_DYC(i,j,bi,bj)
289     ENDDO
290     ENDDO
291 jmc 1.20
292     C horizontal gradient of vertical vorticity:
293     C- gradient in x direction:
294     DO j=2-Oly,sNy+Oly
295     DO i=2-Olx,sNx+Olx-1
296     vrtDx(i,j) = (vort3(i+1,j)-vort3(i,j))
297     & *recip_DXG(i,j,bi,bj)
298     & *maskS(i,j,k,bi,bj)
299     ENDDO
300     ENDDO
301     C- gradient in y direction:
302     DO j=2-Oly,sNy+Oly-1
303     DO i=2-Olx,sNx+Olx
304     vrtDy(i,j) = (vort3(i,j+1)-vort3(i,j))
305     & *recip_DYG(i,j,bi,bj)
306     & *maskW(i,j,k,bi,bj)
307     ENDDO
308     ENDDO
309    
310 jmc 1.16 ENDIF
311    
312 baylor 1.1 DO j=2-Oly,sNy+Oly-1
313     DO i=2-Olx,sNx+Olx-1
314     CCCCCCCCCCCCCCC Divergence Point CalculationsCCCCCCCCCCCCCCCCCCCC
315 baylor 1.5
316 jmc 1.32 C These are (powers of) length scales
317 baylor 1.11 IF (useAreaViscLength) THEN
318 jmc 1.12 L2=rA(i,j,bi,bj)
319 mlosch 1.31 L4rdt=0.03125 _d 0*recip_dt*L2**2
320 baylor 1.11 ELSE
321     L2=2. _d 0/((recip_DXF(I,J,bi,bj)**2+recip_DYF(I,J,bi,bj)**2))
322 mlosch 1.31 L4rdt=recip_dt/( 6. _d 0*(recip_DXF(I,J,bi,bj)**4
323     & +recip_DYF(I,J,bi,bj)**4)
324     & +8. _d 0*((recip_DXF(I,J,bi,bj)
325     & *recip_DYF(I,J,bi,bj))**2) )
326 baylor 1.11 ENDIF
327 baylor 1.1 L3=(L2**1.5)
328     L4=(L2**2)
329 mlosch 1.31 L5=(L2*L3)
330 baylor 1.5
331 jmc 1.10 L2rdt=0.25 _d 0*recip_dt*L2
332 baylor 1.5
333     C Velocity Reynolds Scale
334 jmc 1.15 IF ( viscAhRe_max.GT.0. .AND. KE(i,j).GT.0. ) THEN
335 jmc 1.32 Uscl=SQRT(KE(i,j)*L2)*viscAhRe_max
336 jmc 1.15 ELSE
337     Uscl=0.
338     ENDIF
339     IF ( viscA4Re_max.GT.0. .AND. KE(i,j).GT.0. ) THEN
340 jmc 1.32 U4scl=SQRT(KE(i,j))*L3*viscA4Re_max
341 jmc 1.15 ELSE
342     U4scl=0.
343     ENDIF
344 baylor 1.5
345 heimbach 1.22 #ifndef ALLOW_AUTODIFF_TAMC
346 jmc 1.32 IF (useFullLeith.AND.calcLeith) THEN
347 baylor 1.1 C This is the vector magnitude of the vorticity gradient squared
348 jmc 1.20 grdVrt=0.25 _d 0*( (vrtDx(i,j+1)*vrtDx(i,j+1)
349     & + vrtDx(i,j)*vrtDx(i,j) )
350     & + (vrtDy(i+1,j)*vrtDy(i+1,j)
351     & + vrtDy(i,j)*vrtDy(i,j) ) )
352 baylor 1.1
353     C This is the vector magnitude of grad (div.v) squared
354     C Using it in Leith serves to damp instabilities in w.
355 jmc 1.16 grdDiv=0.25 _d 0*( (divDx(i+1,j)*divDx(i+1,j)
356     & + divDx(i,j)*divDx(i,j) )
357     & + (divDy(i,j+1)*divDy(i,j+1)
358     & + divDy(i,j)*divDy(i,j) ) )
359 baylor 1.5
360     viscAh_DLth(i,j)=
361 jmc 1.32 & SQRT(leith2fac*grdVrt+leithD2fac*grdDiv)*L3
362 baylor 1.17 viscA4_DLth(i,j)=
363 jmc 1.32 & SQRT(leith4fac*grdVrt+leithD4fac*grdDiv)*L5
364 baylor 1.5 viscAh_DLthd(i,j)=
365 jmc 1.32 & SQRT(leithD2fac*grdDiv)*L3
366 baylor 1.17 viscA4_DLthd(i,j)=
367 jmc 1.32 & SQRT(leithD4fac*grdDiv)*L5
368     ELSEIF (calcLeith) THEN
369 baylor 1.1 C but this approximation will work on cube
370     c (and differs by as much as 4X)
371 jmc 1.32 grdVrt=MAX( ABS(vrtDx(i,j+1)), ABS(vrtDx(i,j)) )
372     grdVrt=MAX( grdVrt, ABS(vrtDy(i+1,j)) )
373     grdVrt=MAX( grdVrt, ABS(vrtDy(i,j)) )
374 baylor 1.5
375 jmc 1.20 c This approximation is good to the same order as above...
376 jmc 1.32 grdDiv=MAX( ABS(divDx(i+1,j)), ABS(divDx(i,j)) )
377     grdDiv=MAX( grdDiv, ABS(divDy(i,j+1)) )
378     grdDiv=MAX( grdDiv, ABS(divDy(i,j)) )
379 baylor 1.1
380 baylor 1.17 viscAh_Dlth(i,j)=(leith2fac*grdVrt+(leithD2fac*grdDiv))*L3
381     viscA4_Dlth(i,j)=(leith4fac*grdVrt+(leithD4fac*grdDiv))*L5
382     viscAh_DlthD(i,j)=((leithD2fac*grdDiv))*L3
383     viscA4_DlthD(i,j)=((leithD4fac*grdDiv))*L5
384 baylor 1.1 ELSE
385 jmc 1.10 viscAh_Dlth(i,j)=0. _d 0
386     viscA4_Dlth(i,j)=0. _d 0
387     viscAh_DlthD(i,j)=0. _d 0
388     viscA4_DlthD(i,j)=0. _d 0
389 baylor 1.1 ENDIF
390    
391 jmc 1.32 IF (calcSmag) THEN
392 baylor 1.5 viscAh_DSmg(i,j)=L2
393 jmc 1.32 & *SQRT(tension(i,j)**2
394 jmc 1.10 & +0.25 _d 0*(strain(i+1, j )**2+strain( i ,j+1)**2
395     & +strain(i , j )**2+strain(i+1,j+1)**2))
396 baylor 1.5 viscA4_DSmg(i,j)=smag4fac*L2*viscAh_DSmg(i,j)
397     viscAh_DSmg(i,j)=smag2fac*viscAh_DSmg(i,j)
398 baylor 1.1 ELSE
399 jmc 1.10 viscAh_DSmg(i,j)=0. _d 0
400     viscA4_DSmg(i,j)=0. _d 0
401 baylor 1.1 ENDIF
402 heimbach 1.22 #endif /* ALLOW_AUTODIFF_TAMC */
403 baylor 1.1
404     C Harmonic on Div.u points
405 baylor 1.5 Alin=viscAhD+viscAhGrid*L2rdt
406     & +viscAh_DLth(i,j)+viscAh_DSmg(i,j)
407 jmc 1.32 viscAh_DMin(i,j)=MAX(viscAhGridMin*L2rdt,Uscl)
408     viscAh_D(i,j)=MAX(viscAh_DMin(i,j),Alin)
409     viscAh_DMax(i,j)=MIN(viscAhGridMax*L2rdt,viscAhMax)
410     viscAh_D(i,j)=MIN(viscAh_DMax(i,j),viscAh_D(i,j))
411 baylor 1.1
412     C BiHarmonic on Div.u points
413 baylor 1.5 Alin=viscA4D+viscA4Grid*L4rdt
414     & +viscA4_DLth(i,j)+viscA4_DSmg(i,j)
415 jmc 1.32 viscA4_DMin(i,j)=MAX(viscA4GridMin*L4rdt,U4scl)
416     viscA4_D(i,j)=MAX(viscA4_DMin(i,j),Alin)
417     viscA4_DMax(i,j)=MIN(viscA4GridMax*L4rdt,viscA4Max)
418     viscA4_D(i,j)=MIN(viscA4_DMax(i,j),viscA4_D(i,j))
419 baylor 1.1
420 jmc 1.27 #ifdef ALLOW_NONHYDROSTATIC
421 jmc 1.32 C-- Pass Viscosities to calc_gw, if constant, not necessary
422 baylor 1.23
423     kp1 = MIN(k+1,Nr)
424    
425 jmc 1.32 IF ( k.EQ.1 ) THEN
426     C Prepare for next level (next call)
427 baylor 1.23 viscAh_W(i,j,kp1,bi,bj)=0.5*viscAh_D(i,j)
428     viscA4_W(i,j,kp1,bi,bj)=0.5*viscA4_D(i,j)
429    
430 jmc 1.32 C These values dont get used
431 jmc 1.27 viscAh_W(i,j,k,bi,bj)=viscAh_D(i,j)
432 baylor 1.23 viscA4_W(i,j,k,bi,bj)=viscA4_D(i,j)
433 jmc 1.32
434     ELSEIF ( k.EQ.Nr ) THEN
435     viscAh_W(i,j,k,bi,bj)=viscAh_W(i,j,k,bi,bj)+0.5*viscAh_D(i,j)
436     viscA4_W(i,j,k,bi,bj)=viscA4_W(i,j,k,bi,bj)+0.5*viscA4_D(i,j)
437    
438     ELSE
439     C Prepare for next level (next call)
440 baylor 1.23 viscAh_W(i,j,kp1,bi,bj)=0.5*viscAh_D(i,j)
441     viscA4_W(i,j,kp1,bi,bj)=0.5*viscA4_D(i,j)
442    
443 jmc 1.32 C Note that previous call of this function has already added half.
444 baylor 1.23 viscAh_W(i,j,k,bi,bj)=viscAh_W(i,j,k,bi,bj)+0.5*viscAh_D(i,j)
445     viscA4_W(i,j,k,bi,bj)=viscA4_W(i,j,k,bi,bj)+0.5*viscA4_D(i,j)
446 jmc 1.32
447     ENDIF
448 baylor 1.23 #endif /* ALLOW_NONHYDROSTATIC */
449    
450 baylor 1.1 CCCCCCCCCCCCC Vorticity Point CalculationsCCCCCCCCCCCCCCCCCC
451 jmc 1.32 C These are (powers of) length scales
452 baylor 1.11 IF (useAreaViscLength) THEN
453 jmc 1.12 L2=rAz(i,j,bi,bj)
454 mlosch 1.31 L4rdt=0.125 _d 0*recip_dt*rAz(i,j,bi,bj)**2
455 baylor 1.11 ELSE
456 jmc 1.12 L2=2. _d 0/((recip_DXV(I,J,bi,bj)**2+recip_DYU(I,J,bi,bj)**2))
457 mlosch 1.31 L4rdt=recip_dt/
458     & ( 6. _d 0*(recip_DXV(I,J,bi,bj)**4+recip_DYU(I,J,bi,bj)**4)
459     & +8. _d 0*((recip_DXV(I,J,bi,bj)*recip_DYU(I,J,bi,bj))**2))
460 baylor 1.11 ENDIF
461    
462 baylor 1.1 L3=(L2**1.5)
463     L4=(L2**2)
464 mlosch 1.31 L5=(L2*L3)
465 baylor 1.5
466 jmc 1.10 L2rdt=0.25 _d 0*recip_dt*L2
467 baylor 1.5
468 jmc 1.15 C Velocity Reynolds Scale (Pb here at CS-grid corners !)
469     IF ( viscAhRe_max.GT.0. .OR. viscA4Re_max.GT.0. ) THEN
470     keZpt=0.25 _d 0*( (KE(i,j)+KE(i-1,j-1))
471     & +(KE(i-1,j)+KE(i,j-1)) )
472     IF ( keZpt.GT.0. ) THEN
473 jmc 1.32 Uscl = SQRT(keZpt*L2)*viscAhRe_max
474     U4scl= SQRT(keZpt)*L3*viscA4Re_max
475 jmc 1.15 ELSE
476     Uscl =0.
477     U4scl=0.
478     ENDIF
479     ELSE
480     Uscl =0.
481     U4scl=0.
482     ENDIF
483 baylor 1.1
484 heimbach 1.22 #ifndef ALLOW_AUTODIFF_TAMC
485 baylor 1.1 C This is the vector magnitude of the vorticity gradient squared
486 jmc 1.32 IF (useFullLeith.AND.calcLeith) THEN
487 jmc 1.20 grdVrt=0.25 _d 0*( (vrtDx(i-1,j)*vrtDx(i-1,j)
488     & + vrtDx(i,j)*vrtDx(i,j) )
489     & + (vrtDy(i,j-1)*vrtDy(i,j-1)
490     & + vrtDy(i,j)*vrtDy(i,j) ) )
491 baylor 1.1
492     C This is the vector magnitude of grad(div.v) squared
493 jmc 1.16 grdDiv=0.25 _d 0*( (divDx(i,j-1)*divDx(i,j-1)
494     & + divDx(i,j)*divDx(i,j) )
495     & + (divDy(i-1,j)*divDy(i-1,j)
496     & + divDy(i,j)*divDy(i,j) ) )
497 baylor 1.5
498     viscAh_ZLth(i,j)=
499 jmc 1.32 & SQRT(leith2fac*grdVrt+leithD2fac*grdDiv)*L3
500 baylor 1.17 viscA4_ZLth(i,j)=
501 jmc 1.32 & SQRT(leith4fac*grdVrt+leithD4fac*grdDiv)*L5
502 baylor 1.5 viscAh_ZLthD(i,j)=
503 jmc 1.32 & SQRT(leithD2fac*grdDiv)*L3
504 baylor 1.17 viscA4_ZLthD(i,j)=
505 jmc 1.32 & SQRT(leithD4fac*grdDiv)*L5
506 baylor 1.5
507 jmc 1.32 ELSEIF (calcLeith) THEN
508 baylor 1.1 C but this approximation will work on cube (and differs by 4X)
509 jmc 1.32 grdVrt=MAX( ABS(vrtDx(i-1,j)), ABS(vrtDx(i,j)) )
510     grdVrt=MAX( grdVrt, ABS(vrtDy(i,j-1)) )
511     grdVrt=MAX( grdVrt, ABS(vrtDy(i,j)) )
512    
513     grdDiv=MAX( ABS(divDx(i,j)), ABS(divDx(i,j-1)) )
514     grdDiv=MAX( grdDiv, ABS(divDy(i,j)) )
515     grdDiv=MAX( grdDiv, ABS(divDy(i-1,j)) )
516 baylor 1.5
517 baylor 1.17 viscAh_ZLth(i,j)=(leith2fac*grdVrt+(leithD2fac*grdDiv))*L3
518     viscA4_ZLth(i,j)=(leith4fac*grdVrt+(leithD4fac*grdDiv))*L5
519     viscAh_ZLthD(i,j)=(leithD2fac*grdDiv)*L3
520     viscA4_ZLthD(i,j)=(leithD4fac*grdDiv)*L5
521 baylor 1.1 ELSE
522 jmc 1.10 viscAh_ZLth(i,j)=0. _d 0
523     viscA4_ZLth(i,j)=0. _d 0
524     viscAh_ZLthD(i,j)=0. _d 0
525     viscA4_ZLthD(i,j)=0. _d 0
526 baylor 1.1 ENDIF
527    
528 jmc 1.32 IF (calcSmag) THEN
529 baylor 1.5 viscAh_ZSmg(i,j)=L2
530 jmc 1.32 & *SQRT(strain(i,j)**2
531 jmc 1.10 & +0.25 _d 0*(tension( i , j )**2+tension( i ,j-1)**2
532     & +tension(i-1, j )**2+tension(i-1,j-1)**2))
533 baylor 1.5 viscA4_ZSmg(i,j)=smag4fac*L2*viscAh_ZSmg(i,j)
534     viscAh_ZSmg(i,j)=smag2fac*viscAh_ZSmg(i,j)
535 baylor 1.1 ENDIF
536 heimbach 1.22 #endif /* ALLOW_AUTODIFF_TAMC */
537 baylor 1.1
538     C Harmonic on Zeta points
539 baylor 1.5 Alin=viscAhZ+viscAhGrid*L2rdt
540     & +viscAh_ZLth(i,j)+viscAh_ZSmg(i,j)
541 jmc 1.32 viscAh_ZMin(i,j)=MAX(viscAhGridMin*L2rdt,Uscl)
542     viscAh_Z(i,j)=MAX(viscAh_ZMin(i,j),Alin)
543     viscAh_ZMax(i,j)=MIN(viscAhGridMax*L2rdt,viscAhMax)
544     viscAh_Z(i,j)=MIN(viscAh_ZMax(i,j),viscAh_Z(i,j))
545 baylor 1.5
546     C BiHarmonic on Zeta points
547     Alin=viscA4Z+viscA4Grid*L4rdt
548     & +viscA4_ZLth(i,j)+viscA4_ZSmg(i,j)
549 jmc 1.32 viscA4_ZMin(i,j)=MAX(viscA4GridMin*L4rdt,U4scl)
550     viscA4_Z(i,j)=MAX(viscA4_ZMin(i,j),Alin)
551     viscA4_ZMax(i,j)=MIN(viscA4GridMax*L4rdt,viscA4Max)
552     viscA4_Z(i,j)=MIN(viscA4_ZMax(i,j),viscA4_Z(i,j))
553 baylor 1.1 ENDDO
554     ENDDO
555 jmc 1.32
556 baylor 1.1 ELSE
557 jmc 1.32 C---- use constant viscosity (useVariableViscosity=F):
558    
559 baylor 1.1 DO j=1-Oly,sNy+Oly
560     DO i=1-Olx,sNx+Olx
561     viscAh_D(i,j)=viscAhD
562     viscAh_Z(i,j)=viscAhZ
563     viscA4_D(i,j)=viscA4D
564     viscA4_Z(i,j)=viscA4Z
565     ENDDO
566     ENDDO
567 jmc 1.32
568     C---- variable/constant viscosity : end if/else block
569 baylor 1.1 ENDIF
570    
571     #ifdef ALLOW_DIAGNOSTICS
572     IF (useDiagnostics) THEN
573     CALL DIAGNOSTICS_FILL(viscAh_D,'VISCAHD ',k,1,2,bi,bj,myThid)
574     CALL DIAGNOSTICS_FILL(viscA4_D,'VISCA4D ',k,1,2,bi,bj,myThid)
575     CALL DIAGNOSTICS_FILL(viscAh_Z,'VISCAHZ ',k,1,2,bi,bj,myThid)
576     CALL DIAGNOSTICS_FILL(viscA4_Z,'VISCA4Z ',k,1,2,bi,bj,myThid)
577 baylor 1.5
578     CALL DIAGNOSTICS_FILL(viscAh_DMax,'VAHDMAX ',k,1,2,bi,bj,myThid)
579     CALL DIAGNOSTICS_FILL(viscA4_DMax,'VA4DMAX ',k,1,2,bi,bj,myThid)
580     CALL DIAGNOSTICS_FILL(viscAh_ZMax,'VAHZMAX ',k,1,2,bi,bj,myThid)
581     CALL DIAGNOSTICS_FILL(viscA4_ZMax,'VA4ZMAX ',k,1,2,bi,bj,myThid)
582    
583     CALL DIAGNOSTICS_FILL(viscAh_DMin,'VAHDMIN ',k,1,2,bi,bj,myThid)
584     CALL DIAGNOSTICS_FILL(viscA4_DMin,'VA4DMIN ',k,1,2,bi,bj,myThid)
585     CALL DIAGNOSTICS_FILL(viscAh_ZMin,'VAHZMIN ',k,1,2,bi,bj,myThid)
586     CALL DIAGNOSTICS_FILL(viscA4_ZMin,'VA4ZMIN ',k,1,2,bi,bj,myThid)
587    
588     CALL DIAGNOSTICS_FILL(viscAh_DLth,'VAHDLTH ',k,1,2,bi,bj,myThid)
589     CALL DIAGNOSTICS_FILL(viscA4_DLth,'VA4DLTH ',k,1,2,bi,bj,myThid)
590     CALL DIAGNOSTICS_FILL(viscAh_ZLth,'VAHZLTH ',k,1,2,bi,bj,myThid)
591     CALL DIAGNOSTICS_FILL(viscA4_ZLth,'VA4ZLTH ',k,1,2,bi,bj,myThid)
592    
593 baylor 1.7 CALL DIAGNOSTICS_FILL(viscAh_DLthD,'VAHDLTHD'
594 baylor 1.8 & ,k,1,2,bi,bj,myThid)
595 baylor 1.7 CALL DIAGNOSTICS_FILL(viscA4_DLthD,'VA4DLTHD'
596 baylor 1.8 & ,k,1,2,bi,bj,myThid)
597 baylor 1.7 CALL DIAGNOSTICS_FILL(viscAh_ZLthD,'VAHZLTHD'
598 baylor 1.8 & ,k,1,2,bi,bj,myThid)
599 baylor 1.7 CALL DIAGNOSTICS_FILL(viscA4_ZLthD,'VA4ZLTHD'
600 baylor 1.8 & ,k,1,2,bi,bj,myThid)
601 baylor 1.5
602     CALL DIAGNOSTICS_FILL(viscAh_DSmg,'VAHDSMAG',k,1,2,bi,bj,myThid)
603     CALL DIAGNOSTICS_FILL(viscA4_DSmg,'VA4DSMAG',k,1,2,bi,bj,myThid)
604     CALL DIAGNOSTICS_FILL(viscAh_ZSmg,'VAHZSMAG',k,1,2,bi,bj,myThid)
605     CALL DIAGNOSTICS_FILL(viscA4_ZSmg,'VA4ZSMAG',k,1,2,bi,bj,myThid)
606 baylor 1.1 ENDIF
607     #endif
608    
609     RETURN
610     END
611 baylor 1.5

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