1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
|
!
! CalculiX - A 3-dimensional finite element program
! Copyright (C) 1998-2015 Guido Dhondt
!
! This program is free software; you can redistribute it and/or
! modify it under the terms of the GNU General Public License as
! published by the Free Software Foundation(version 2);
!
!
! This program is distributed in the hope that it will be useful,
! but WITHOUT ANY WARRANTY; without even the implied warranty of
! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
! GNU General Public License for more details.
!
! You should have received a copy of the GNU General Public License
! along with this program; if not, write to the Free Software
! Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
!
! calculate the initial conditions for the gas
! - the initial pressure
! - identifying the chambers and gas pipe nodes
! for gas networks
! - the initial flow
! - calculating the static temperature for gas networks
!
subroutine initialchannel(itg,ieg,ntg,ac,bc,lakon,v,
& ipkon,kon,nflow,ikboun,nboun,prop,ielprop,
& nactdog,ndirboun,nodeboun,xbounact,
& ielmat,ntmat_,shcon,nshcon,physcon,ipiv,nteq,
& rhcon,nrhcon,ipobody,ibody,xbodyact,co,nbody,network,
& iin_abs,vold,set,istep,iit,mi,ineighe,ilboun,ttime,
& time,iaxial)
!
implicit none
!
logical identity,calcinitialpressure,gravity,gaspipe
!
character*8 lakon(*)
character*81 set(*)
!
integer mi(*),ieg(*),nflow,i,j,ntg,ielmat(mi(3),*),ntmat_,id,
& node1,node2,
& nelem,index,nshcon(*),ipkon(*),kon(*),ikboun(*),nboun,idof,
& nodem,idirf(5),nactdog(0:3,*),imat,ielprop(*),id1,id2,
& nodef(5),ndirboun(*),nodeboun(*),itg(*),node,kflag,ipiv(*),
& nrhs,info,idof1,idof2,nteq,nrhcon(*),ipobody(2,*),ibody(3,*),
& nbody,numf,network,iin_abs,icase,index2,index1,nelem1,nelem2,
& node11,node21,node12,node22,istep,iit,ineighe(*),
& ilboun(*),nelemup,k,node2up,ider,iaxial
!
real*8 ac(nteq,nteq), bc(nteq),prop(*),shcon(0:3,ntmat_,*),
& f,df(5),xflow,xbounact(*),v(0:mi(2),*),cp,r,tg1,
& tg2,gastemp,physcon(*),pressmin,dvi,rho,g(3),z1,z2,
& rhcon(0:1,ntmat_,*),co(3,*),xbodyact(7,*),kappa,
& a,Tt,Pt,Ts,pressmax,constant,vold(0:mi(2),*),href,
& ttime,time
!
kflag=1
!
! applying the boundary conditions
!
do j=1,nboun
v(ndirboun(j),nodeboun(j))=xbounact(j)
enddo
!
! determining the initial pressure (not for purely thermal networks)
! and identifying the chamber and gas pipe nodes (only for gas
! networks)
!
if(network.ne.0) then
!
! determining whether pressure initial conditions
! are provided for all nodes
!
pressmin=-1.d0
pressmax=0.d0
constant=1.55d0
do i=1,ntg
node=itg(i)
if(v(2,node).lt.1.d-10) then
v(2,node)=0.d0
else
if(pressmin.lt.0.d0) then
pressmin=v(2,node)
elseif(v(2,node).lt.pressmin) then
pressmin=v(2,node)
endif
!
if(v(2,node).gt.pressmax)then
pressmax=v(2,node)
endif
!
endif
enddo
!
if(pressmin.lt.0.d0) then
write(*,*) '*ERROR in initialgas: minimum initial pressure'
write(*,*) ' is smaller than zero'
call exit(201)
endif
!
! in nodes in which no initial pressure is given v(2,*)
! is replaced by -n, where n is the number of elements the
! node belongs to: allows to find boundary nodes of the
! network
!
gaspipe=.false.
calcinitialpressure=.false.
!
do i=1,nflow
nelem=ieg(i)
index=ipkon(nelem)
node1=kon(index+1)
node2=kon(index+3)
call nident(itg,node1,ntg,id1)
call nident(itg,node2,ntg,id2)
!
if ((((lakon(nelem)(1:5).eq.'DGAPF')
& .or.(lakon(nelem)(1:5).eq.'DGAPI')).and.(iin_abs.eq.0))
& .or.((lakon(nelem)(1:3).eq.'DRE')
& .and.(lakon(nelem)(1:7).ne.'DREWAOR')
& .and.(iin_abs.eq.0))) then
!
! In the case of a element of type GASPIPE or RESTRICTOR
! (except TYPE= RESTRICTOR WALL ORIFICE)
! the number of pipes connected to node 1 and 2
! are computed and stored in ineighe(id1)
! respectively ineighe(id2)
!
gaspipe=.true.
if(node1.ne.0) then
if (ineighe(id1).ge.0) then
!
if(node2.ne.0)then
ineighe(id1)=ineighe(id1)+1
endif
endif
endif
if(node2.ne.0) then
if (ineighe(id2).ge.0) then
if(node1.ne.0) then
ineighe(id2)=ineighe(id2)+1
endif
endif
endif
else
if(iin_abs.eq.0) then
!
! for all other elements (different from GASPIPE or
! RESTRICTOR), including RESTRICTOR WALL ORIFICE
! ineighe(idi)=-1
! which means that they are connected to chambers
! i.e. static and total values are equal
!
if (node1.ne.0) then
ineighe(id1)=-1
endif
if(node2.ne.0) then
ineighe(id2)=-1
endif
endif
endif
!
if((node1.eq.0).or.(node2.eq.0)) cycle
if(v(2,node1).lt.1.d-10) then
v(2,node1)=v(2,node1)-1.d0
calcinitialpressure=.true.
endif
if(v(2,node2).lt.1.d-10) then
v(2,node2)=v(2,node2)-1.d0
calcinitialpressure=.true.
endif
enddo
!
! for each end node i: if ineighe(i)<0: chamber
! else: ineighe(i)=number of pipe connections
!
else
!
! identifying the chamber nodes for purely thermal
! gas networks (needed to determine the static
! temperature which is used for the material properties)
!
do i=1,nflow
nelem=ieg(i)
if((lakon(nelem)(2:3).eq.'LP').or.
& (lakon(nelem)(2:3).eq.'LI')) cycle
index=ipkon(nelem)
node1=kon(index+1)
node2=kon(index+3)
if(node1.ne.0) then
call nident(itg,node1,ntg,id1)
ineighe(id1)=-1
endif
if(node2.ne.0) then
call nident(itg,node2,ntg,id2)
ineighe(id2)=-1
endif
enddo
endif
!
! temperature initial conditions
!
do i=1,ntg
node=itg(i)
if (nactdog(0,node).eq.0) cycle
if (v(0,node)+physcon(1).lt.1.d-10) then
write(*,*)
& '*WARNING in initialgas : the initial temperature for n
&ode',node
write(*,*)
& 'is O Kelvin or less; the default is taken (293 K)'
write(*,*)
v(0,node)=293.d0+physcon(1)
endif
enddo
!
! initialisation of bc
!
do i=1,nteq
bc(i)=0.d0
enddo
!
! determining the initial mass flow in those nodes for which no
! flux boundary conditions are defined
! liquid channels are treated separately
!
if(network.ne.0)then
!
! calculate the initial mass flow
!
! check whether the mass flow is given as a boundary condition
!
do j=1,nflow
nelem=ieg(j)
index=ipkon(nelem)
nodem=kon(index+2)
if(nactdog(1,nodem).eq.0) then
idof=8*(nodem-1)+1
call nident(ikboun,idof,nboun,id)
if(id.gt.0) then
if(ikboun(id).eq.idof) then
xflow=xbounact(ilboun(id))
if(dabs(xflow).gt.1.d-30) exit
endif
endif
endif
enddo
!
if(dabs(xflow).gt.1.d-30) then
!
! if nonzero: set all mass flow to this value
!
do j=1,nflow
nelem=ieg(j)
index=ipkon(nelem)
nodem=kon(index+2)
if(nactdog(1,nodem).ne.0) v(1,nodem)=xflow
enddo
else
!
! calculate the mass flow: look for a sluice gate or weir
!
do j=1,nflow
nelem=ieg(j)
if((lakon(nelem)(6:7).ne.'SG').and.
& (lakon(nelem)(6:7).ne.'WE')) cycle
index=ipkon(nelem)
node1=kon(index+1)
node2=kon(index+3)
if((node1.eq.0).or.(node2.eq.0)) cycle
nodem=kon(index+2)
!
! determine the gravity vector
!
gravity=.false.
do k=1,3
g(k)=0.d0
enddo
if(nbody.gt.0) then
index=nelem
do
k=ipobody(1,index)
if(k.eq.0) exit
if(ibody(1,k).eq.2) then
g(1)=g(1)+xbodyact(1,k)*xbodyact(2,k)
g(2)=g(2)+xbodyact(1,k)*xbodyact(3,k)
g(3)=g(3)+xbodyact(1,k)*xbodyact(4,k)
gravity=.true.
endif
index=ipobody(2,index)
if(index.eq.0) exit
enddo
endif
if(.not.gravity) then
write(*,*)'*ERROR in initialgas: no gravity vector'
write(*,*) ' was defined for liquid element',
& nelem
call exit(201)
endif
!
tg1=v(0,node1)
tg2=v(0,node2)
gastemp=(tg1+tg2)/2.d0
imat=ielmat(1,nelem)
call materialdata_tg(imat,ntmat_,gastemp,shcon,nshcon,
& cp,r,dvi,rhcon,nrhcon,rho)
!
call flux(node1,node2,nodem,nelem,lakon,kon,ipkon,
& nactdog,identity,ielprop,prop,kflag,v,xflow,f,
& nodef,idirf,df,cp,r,rho,physcon,g,co,dvi,numf,
& vold,set,shcon,nshcon,rhcon,nrhcon,ntmat_,mi,ider,
& ttime,time,iaxial)
!
if(dabs(xflow).gt.1.d-30) exit
enddo
!
if(dabs(xflow).gt.1.d-30) then
!
! if nonzero: set all mass flow to this value
!
do j=1,nflow
nelem=ieg(j)
index=ipkon(nelem)
nodem=kon(index+2)
if(nactdog(1,nodem).ne.0) v(1,nodem)=xflow
enddo
else
write(*,*) '*ERROR in initialgas: initial mass flow'
write(*,*) ' cannot be determined'
call exit(201)
endif
endif
!
! calculate the depth
!
if(calcinitialpressure) then
!
! determine the streamdown depth for sluice gates,
! weirs and discontinuous slopes
!
do j=1,nflow
nelem=ieg(j)
if((lakon(nelem)(6:7).ne.'SG').and.
& (lakon(nelem)(6:7).ne.'WE').and.
& (lakon(nelem)(6:7).ne.'DS')) cycle
index=ipkon(nelem)
node1=kon(index+1)
node2=kon(index+3)
if((node1.eq.0).or.(node2.eq.0)) cycle
nodem=kon(index+2)
!
! determine the gravity vector
!
gravity=.false.
do k=1,3
g(k)=0.d0
enddo
if(nbody.gt.0) then
index=nelem
do
k=ipobody(1,index)
if(k.eq.0) exit
if(ibody(1,k).eq.2) then
g(1)=g(1)+xbodyact(1,k)*xbodyact(2,k)
g(2)=g(2)+xbodyact(1,k)*xbodyact(3,k)
g(3)=g(3)+xbodyact(1,k)*xbodyact(4,k)
gravity=.true.
endif
index=ipobody(2,index)
if(index.eq.0) exit
enddo
endif
if(.not.gravity) then
write(*,*)'*ERROR in initialgas: no gravity vector'
write(*,*) ' was defined for liquid element',
& nelem
call exit(201)
endif
!
tg1=v(0,node1)
tg2=v(0,node2)
gastemp=(tg1+tg2)/2.d0
imat=ielmat(1,nelem)
call materialdata_tg(imat,ntmat_,gastemp,shcon,nshcon,
& cp,r,dvi,rhcon,nrhcon,rho)
!
call flux(node1,node2,nodem,nelem,lakon,kon,ipkon,
& nactdog,identity,ielprop,prop,kflag,v,xflow,f,
& nodef,idirf,df,cp,r,rho,physcon,g,co,dvi,numf,
& vold,set,shcon,nshcon,rhcon,nrhcon,ntmat_,mi,ider,
& ttime,time,iaxial)
!
enddo
!
! for all other elements the depth is taken to be
! 0.9 of the depth in the downstream node of the
! streamup reference element
!
do j=1,nflow
nelem=ieg(j)
if((lakon(nelem)(6:7).eq.'SG').or.
& (lakon(nelem)(6:7).eq.'WE').or.
& (lakon(nelem)(6:7).eq.'DS')) cycle
!
index=ipkon(nelem)
node1=kon(index+1)
node2=kon(index+3)
if((node1.eq.0).or.(node2.eq.0)) cycle
!
index=ielprop(nelem)
nelemup=nint(prop(index+6))
node2up=kon(ipkon(nelemup)+3)
href=0.9d0*v(2,node2up)
if(nactdog(2,node1).ne.0)
& v(2,node1)=href
if(nactdog(2,node2).ne.0)
& v(2,node2)=href
enddo
!
! reapplying the boundary conditions (the depth of the
! sluice gate may have changed if it exceeded the critical
! value
!
do j=1,nboun
v(ndirboun(j),nodeboun(j))=xbounact(j)
enddo
endif
!
! calculating the static temperature for nodes belonging to gas pipes
! and restrictors (except RESTRICTOR WALL ORIFICE)
!
endif
!
! for chambers the static temperature equals the total
! temperature
!
do i=1,ntg
if(ineighe(i).eq.-1) v(3,itg(i))=v(0,itg(i))
enddo
!
return
end
|
