COMSOL Multiphysics™

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sphere3, sphere2 . . . . . . . . . . . . . . . . . . . . . . 392 split . . . . . . . . . . . . . . . . . . . . . . . . . . . 394 square1, square2 . . . . . . . . . . . . . . . . . . . . . . 395 tangent . . . . . . . . . . . . . . . . . . . . . . . . . 397 tetrahedron2, tetrahedron3. . . . . . . . . . . . . . . . . . 399 torus2, torus3 . . . . . . . . . . . . . . . . . . . . . . . 400 xmeshinfo . . . . . . . . . . . . . . . . . . . . . . . . 402 Chapter 2: Diagnostics Error Messages 410 2000–2999 Geometry Modeling . . . . . . . . . . . . . . . . 410 4000–4999 Mesh Generation . . . . . . . . . . . . . . . . . 411 6000–6999 Assembly and Extended Mesh . . . . . . . . . . . . 413 7000—7999 Solvers and Preconditioners. . . . . . . . . . . . . 416 9000–9999 General Errors . . . . . . . . . . . . . . . . . . 419 Solver Error Messages . . . . . . . . . . . . . . . . . . . . 421 Chapter 3: The <strong>COMSOL</strong> Multiphysics Files Overview 426 File Structure . . . . . . . . . . . . . . . . . . . . . . . 426 Records . . . . . . . . . . . . . . . . . . . . . . . . . 427 Terminology. . . . . . . . . . . . . . . . . . . . . . . . 428 Text File Format . . . . . . . . . . . . . . . . . . . . . . 428 Binary File Format . . . . . . . . . . . . . . . . . . . . . 428 Serializable Types 430 Attribute . . . . . . . . . . . . . . . . . . . . . . . . . 431 BezierCurve . . . . . . . . . . . . . . . . . . . . . . . 432 BezierMfd . . . . . . . . . . . . . . . . . . . . . . . . 433 BezierSurf . . . . . . . . . . . . . . . . . . . . . . . . 434 BezierTri . . . . . . . . . . . . . . . . . . . . . . . . . 435 BSplineCurve . . . . . . . . . . . . . . . . . . . . . . . 436 BSplineMfd . . . . . . . . . . . . . . . . . . . . . . . . 437 vi | CONTENTS
BSplineSurf . . . . . . . . . . . . . . . . . . . . . . . . 439 Ellipse . . . . . . . . . . . . . . . . . . . . . . . . . . 440 Geom0 . . . . . . . . . . . . . . . . . . . . . . . . . 442 Geom1 . . . . . . . . . . . . . . . . . . . . . . . . . 443 Geom2 . . . . . . . . . . . . . . . . . . . . . . . . . 444 Geom3 . . . . . . . . . . . . . . . . . . . . . . . . . 446 GeomFile. . . . . . . . . . . . . . . . . . . . . . . . . 447 Manifold . . . . . . . . . . . . . . . . . . . . . . . . . 448 Mesh . . . . . . . . . . . . . . . . . . . . . . . . . . 449 MeshCurve . . . . . . . . . . . . . . . . . . . . . . . . 451 MeshSurf . . . . . . . . . . . . . . . . . . . . . . . . . 452 Plane . . . . . . . . . . . . . . . . . . . . . . . . . . 453 PolChain . . . . . . . . . . . . . . . . . . . . . . . . . 454 Serializable . . . . . . . . . . . . . . . . . . . . . . . . 455 Straight . . . . . . . . . . . . . . . . . . . . . . . . . 456 Transform . . . . . . . . . . . . . . . . . . . . . . . . 457 VectorDouble . . . . . . . . . . . . . . . . . . . . . . . 458 VectorInt. . . . . . . . . . . . . . . . . . . . . . . . . 459 VectorString . . . . . . . . . . . . . . . . . . . . . . . 460 Examples 461 A Mesh with Mixed Element Types . . . . . . . . . . . . . . . 461 A Planar Face . . . . . . . . . . . . . . . . . . . . . . . 465 INDEX 469 CONTENTS | vii
Page 1 and 2: COMSOL Multiphysics COMMAND REFERE
Page 3 and 4: CONTENTS Chapter 1: Command Referen
Page 5 and 6: femplot . . . . . . . . . . . . . .
Page 7: postarrow . . . . . . . . . . . . .
Page 11 and 12: 1 Command Reference 1
Page 13 and 14: elpconstr on page 99 elplastic on p
Page 15 and 16: mirror on page 301 move on page 302
Page 17 and 18: Commands Grouped by Function User I
Page 19 and 20: Geometry Objects FUNCTION block2 bl
Page 21 and 22: Mesh Functions FUNCTION femmesh flc
Page 23 and 24: Postprocessing Functions FUNCTION m
Page 25 and 26: FUNCTION elmapextr elmesh elode elp
Page 27 and 28: FUNCTION PURPOSE REPLACEMENT flsdt
Page 29 and 30: In FEMLAB 3.0, all FEMLAB 2.3 Eleme
Page 31 and 32: adaption TABLE 1-1: VALID PROPERTY/
Page 33 and 34: adaption Convergence Control No mor
Page 35 and 36: adaption fem.bnd.ind = [1 1 2 2 2 2
Page 37 and 38: adaption The Coefficient residual c
Page 39 and 40: assemble Purpose assemble Assemble
Page 41 and 42: assemble matrix contribution (from
Page 43 and 44: assemble In FEMLAB 2.3, the size of
Page 45 and 46: asseminit TABLE 1-3: VALID PROPERTY
Page 47 and 48: lock2, block3 Purpose block2, block
Page 49 and 50: chamfer Purpose chamfer Create flat
Page 51 and 52: circ1, circ2 Purpose circ1, circ2 C
Page 53 and 54: comsol Purpose comsol Start the COM
Page 55 and 56: cone2, cone3 Cone objects have the
Page 57 and 58: curve2, curve3 The coercion functio
Page 59 and 60:
cylinder2, cylinder3 TABLE 1-13: CY
Page 61 and 62:
econe2, econe3 Purpose econe2, econ
Page 63 and 64:
elcconstr Purpose elcconstr Define
Page 65 and 66:
elcontact Purpose elcontact Define
Page 67 and 68:
elcontact See Also elmapextr 57
Page 69 and 70:
elcplextr transformation is used as
Page 71 and 72:
elcplgenint Purpose elcplgenint Def
Page 73 and 74:
elcplproj Purpose elcplproj Define
Page 75 and 76:
elcplproj map1.dg = '1'; map1.dv =
Page 77 and 78:
elcplscalar el.elem = 'elcplscalar'
Page 79 and 80:
elempty Purpose elempty Define some
Page 81 and 82:
elempty clear el; el.elem = 'elempt
Page 83 and 84:
elepspec Examples Given a single-ge
Page 85 and 86:
eleqc Make sure that the integratio
Page 87 and 88:
eleqw fem.elem = [fem.elem {el}]; f
Page 89 and 90:
elgeom Purpose elgeom Define geomet
Page 91 and 92:
elgpspec elgpspec can be added in t
Page 93 and 94:
elinline el.dexpr = {'1/(2*sqrt(a)+
Page 95 and 96:
elinterp el.elem = 'elinterp'; el.n
Page 97 and 98:
elirradiation Purpose elirradiation
Page 99 and 100:
ellip1, ellip2 Purpose ellip1, elli
Page 101 and 102:
ellipsoid2, ellipsoid3 Purpose elli
Page 103 and 104:
elmapextr Purpose elmapextr Define
Page 105 and 106:
elmapextr fem.sol = femeig(fem,'nei
Page 107 and 108:
elode Purpose elode Define global s
Page 109 and 110:
elpconstr Purpose elpconstr Define
Page 111 and 112:
elplastic Purpose elplastic Define
Page 113 and 114:
elpric Purpose elpric Define variab
Page 115 and 116:
elsconstr vector. The normal compon
Page 117 and 118:
elshape TABLE 1-20: BASIC MESH ELEM
Page 119 and 120:
elshell_arg2 Purpose elshell_arg2 C
Page 121 and 122:
elshell_arg2 Postprocessing variabl
Page 123 and 124:
elvar Purpose elvar Define expressi
Page 125 and 126:
extrude Purpose extrude Extrude a 2
Page 127 and 128:
face3 Purpose face3 Create 3D surfa
Page 129 and 130:
femdiff Purpose femdiff Symbolicall
Page 131 and 132:
femeig Purpose femeig Solve eigenva
Page 133 and 134:
femeig where Ω is the L-shaped mem
Page 135 and 136:
femlin KN T N 0 U - U 0 Λ = L M ,
Page 137 and 138:
femlin nullfun and symmetric can be
Page 139 and 140:
femmesh Purpose femmesh Create a me
Page 141 and 142:
femmesh Tetrahedral element (tet):
Page 143 and 144:
femmesh FACE (EDGE NODES) FACE MID
Page 145 and 146:
femnlin Purpose femnlin Solve nonli
Page 147 and 148:
femnlin components fixed, the augme
Page 149 and 150:
femnlin The property Rstep sets a r
Page 151 and 152:
femplot PROPERTY VALUE DEFAULT DESC
Page 153 and 154:
femsim The names of the input varia
Page 155 and 156:
femsim Most of the FEMLAB 2.3 data
Page 157 and 158:
femsol Example Create a solution ob
Page 159 and 160:
femsolver TABLE 1-30: COMMON SOLVER
Page 161 and 162:
femsolver PROBE PLOT PARAMETERS Pro
Page 163 and 164:
femsolver Equations” on page 440
Page 165 and 166:
femsolver TABLE 1-33: DIRECT LINEAR
Page 167 and 168:
femsolver TABLE 1-34: ITERATIVE LIN
Page 169 and 170:
femsolver scalar Shapechg, and the
Page 171 and 172:
femsolver TABLE 1-36: OBSOLETE PROP
Page 173 and 174:
femstate with the property State=on
Page 175 and 176:
femstatic dependent and if these ma
Page 177 and 178:
femtime Purpose femtime Solve time-
Page 179 and 180:
femtime initial values are consiste
Page 181 and 182:
femtime Cautionary In structural me
Page 183 and 184:
femwave and then transforms the PDE
Page 185 and 186:
femwave Weak coefficients are cell
Page 187 and 188:
fillet Purpose fillet Create circul
Page 189 and 190:
flcontour2mesh Purpose flcontour2me
Page 191 and 192:
flform Purpose flform Convert betwe
Page 193 and 194:
flim2curve Purpose flim2curve Creat
Page 195 and 196:
flload Purpose flload Load a COMSOL
Page 197 and 198:
flmesh2spline figure meshplot(msh)
Page 199 and 200:
flnull Purpose flnull Compute null
Page 201 and 202:
flreport Purpose flreport Globally
Page 203 and 204:
flsmhs, flsmsign, fldsmhs, fldsmsig
Page 205 and 206:
gencyl2, gencyl3 s2 = gencyl2(...)
Page 207 and 208:
geom0, geom1, geom2, geom3 edge is
Page 209 and 210:
geom0, geom1, geom2, geom3 See Also
Page 211 and 212:
geomanalyze % Circle moving through
Page 213 and 214:
geomarrayr The input argument g1, g
Page 215 and 216:
geomcomp Purpose geomcomp Analyze g
Page 217 and 218:
geomcsg g = geomcsg(sl,pl,...) deco
Page 219 and 220:
geomcsg TABLE 1-57: GEOMETRY MODEL
Page 221 and 222:
geomdel Purpose geomdel Delete poin
Page 223 and 224:
geomedit Purpose geomedit Edit geom
Page 225 and 226:
geomfile Purpose geomfile Geometry
Page 227 and 228:
geomfile clear fem fem.geom = 'card
Page 229 and 230:
geomgetwrkpln respect to the face.
Page 231 and 232:
geomgroup Examples See Also [g pair
Page 233 and 234:
geomimport TABLE 1-64: VALID PROPER
Page 235 and 236:
geominfo Out specifies the geometry
Page 237 and 238:
geominfo DD = reshape(ff2{m}(im1,im
Page 239 and 240:
geominfo The following commands, se
Page 241 and 242:
geomobject Purpose geomobject Creat
Page 243 and 244:
geomplot design philosophy has been
Page 245 and 246:
geomplot 2D Example Start by creati
Page 247 and 248:
geomposition Purpose geomposition P
Page 249 and 250:
geomspline p agree to within 1000*e
Page 251 and 252:
getparts Purpose getparts Extract p
Page 253 and 254:
line1, line2 Purpose line1, line2 C
Page 255 and 256:
loft gl{2} and so on. It is require
Page 257 and 258:
loft See Also extrude, geomgetwrkpl
Page 259 and 260:
mesh2geom fem.mesh=meshinit(rect2);
Page 261 and 262:
meshcaseadd The mesh case generatio
Page 263 and 264:
meshdel Purpose meshdel Delete elem
Page 265 and 266:
meshembed Purpose meshembed Embed a
Page 267 and 268:
meshenrich TABLE 1-4: VALID PROPERT
Page 269 and 270:
meshexport Purpose meshexport Expor
Page 271 and 272:
meshextrude Purpose meshextrude Ext
Page 273 and 274:
meshimport Purpose meshimport Impor
Page 275 and 276:
meshimport sum of the coordinates o
Page 277 and 278:
meshinit TABLE 1-8: VALID PROPERTY/
Page 279 and 280:
meshinit TABLE 1-8: VALID PROPERTY/
Page 281 and 282:
meshinit TABLE 1-10: MESH PARAMETER
Page 283 and 284:
meshinit The properties xscale, ysc
Page 285 and 286:
meshintegrate Purpose meshintegrate
Page 287 and 288:
meshmap Purpose meshmap Create mapp
Page 289 and 290:
meshmap HAUTO SCALE FACTOR 3 0.55 4
Page 291 and 292:
meshplot Purpose meshplot Plot mesh
Page 293 and 294:
meshplot TABLE 1-11: VALID PROPERTY
Page 295 and 296:
meshplot The bound property group c
Page 297 and 298:
meshplot See Also femmesh, geomplot
Page 299 and 300:
meshqual Purpose meshqual Mesh qual
Page 301 and 302:
meshrefine Purpose meshrefine Refin
Page 303 and 304:
meshrevolve Purpose meshrevolve Rev
Page 305 and 306:
meshsmooth Purpose meshsmooth Smoot
Page 307 and 308:
meshsweep Purpose meshsweep Create
Page 309 and 310:
meshsweep • There can only be one
Page 311 and 312:
mirror Purpose mirror Reflect geome
Page 313 and 314:
multiphysics Purpose multiphysics M
Page 315 and 316:
multiphysics The table below descri
Page 317 and 318:
multiphysics which domain group in
Page 319 and 320:
multiphysics Elements of fem1.***.(
Page 321 and 322:
multiphysics Fem.***.init is constr
Page 323 and 324:
pde2geom Purpose pde2geom Convert a
Page 325 and 326:
point1, point2, point3 Purpose poin
Page 327 and 328:
poisson Purpose poisson Fast soluti
Page 329 and 330:
poly1, poly2 Purpose poly1, poly2 C
Page 331 and 332:
postarrow postarrow Purpose Shortha
Page 333 and 334:
postcont postcont Purpose Shorthand
Page 335 and 336:
postcoord fem.xmesh = meshextend(fe
Page 337 and 338:
postcrossplot points for the differ
Page 339 and 340:
postcrossplot TABLE 1-24: VALID PRO
Page 341 and 342:
postcrossplot postcrossplot(fem,2,6
Page 343 and 344:
posteval Purpose posteval Evaluate
Page 345 and 346:
posteval Solnum is provided, the so
Page 347 and 348:
postflow postflow Purpose Shorthand
Page 349 and 350:
postglobaleval % Evaluate 'r+f' and
Page 351 and 352:
postglobalplot If Outtype is 'handl
Page 353 and 354:
postint Purpose postint Integrate e
Page 355 and 356:
postinterp Purpose postinterp Evalu
Page 357 and 358:
postinterp The property Phase is de
Page 359 and 360:
postlin postlin Purpose Shorthand c
Page 361 and 362:
postmin Purpose postmin Compute min
Page 363 and 364:
postmovie TABLE 1-30: VALID PROPERT
Page 365 and 366:
postplot TABLE 1-31: VALID PROPERTY
Page 367 and 368:
Page 369 and 370:
Page 371 and 372:
Page 373 and 374:
Page 375 and 376:
postplot associated to each point o
Page 377 and 378:
postplot fem.equ.c = 1; fem.equ.f =
Page 379 and 380:
postprincbnd postprincbnd Purpose S
Page 381 and 382:
postsurf postsurf Purpose Shorthand
Page 383 and 384:
pyramid2, pyramid3 Purpose pyramid2
Page 385 and 386:
ect1, rect2 Purpose rect1, rect2 Cr
Page 387 and 388:
evolve Purpose revolve Revolve a 2D
Page 389 and 390:
otate e1 = ellip2(0,0,1,3); e2 = ro
Page 391 and 392:
sharg_2_5 Purpose sharg_2_5 Create
Page 393 and 394:
shcurl Purpose shcurl Create a vect
Page 395 and 396:
shdisc Purpose shdisc Create a disc
Page 397 and 398:
shgp Purpose shgp Create a Gauss-po
Page 399 and 400:
shlag Purpose shlag Create a Lagran
Page 401 and 402:
solid0, solid1, solid2, solid3 The
Page 403 and 404:
sphere3, sphere2 the evaluation con
Page 405 and 406:
square1, square2 Purpose square1, s
Page 407 and 408:
tangent Purpose tangent Create a ta
Page 409 and 410:
tetrahedron2, tetrahedron3 Purpose
Page 411 and 412:
torus2, torus3 TABLE 1-49: TORUS OB
Page 413 and 414:
xmeshinfo is requested for. The pro
Page 415 and 416:
xmeshinfo TABLE 1-52: NODES STRUCT
Page 417 and 418:
xmeshinfo dofs.coords(:,30) % alter
Page 419 and 420:
2 Diagnostics This chapter contains
Page 421 and 422:
TABLE 2-2: GEOMETRY MODELING ERROR
Page 423 and 424:
6000-6999 Assembly and Extended Mes
Page 425 and 426:
TABLE 2-4: ASSEMBLY AND EXTENDED ME
Page 427 and 428:
TABLE 2-5: SOLVER ERROR MESSAGES ER
Page 429 and 430:
9000-9999 General Errors TABLE 2-6:
Page 431 and 432:
Solver Error Messages These error m
Page 433 and 434:
TABLE 2-7: SOLVER ERROR MESSAGES IN
Page 435 and 436:
3 The COMSOL Multiphysics Files Thi
Page 437 and 438:
2 m1 ######## Types 1 # number of t
Page 439 and 440:
To load and save COMSOL Multiphysic
Page 441 and 442:
Attribute Attribute Supported Versi
Page 443 and 444:
BezierMfd BezierMfd Supported Versi
Page 445 and 446:
BezierTri BezierTri Supported Versi
Page 447 and 448:
BSplineMfd BSplineMfd Supported Ver
Page 449 and 450:
BSplineSurf BSplineSurf Supported V
Page 451 and 452:
Ellipse 0 # reverse 2 0 # major axi
Page 453 and 454:
Geom1 Geom1 Supported Versions 1 Su
Page 455 and 456:
Geom2 0 0 1 1 2.2999999999999998 1
Page 457 and 458:
GeomFile GeomFile Supported Version
Page 459 and 460:
Mesh Mesh Supported Versions 1 Subt
Page 461 and 462:
MeshCurve MeshCurve Supported Versi
Page 463 and 464:
Plane Plane Supported Versions 1 Su
Page 465 and 466:
Serializable Serializable Supported
Page 467 and 468:
Transform Transform Supported Versi
Page 469 and 470:
VectorInt Supported Versions Vector
Page 471 and 472:
Examples To illustrate the use of t
Page 473 and 474:
410 506 409 528 762 760 831 859 525
Page 475 and 476:
7 ... 5 5 5 224 # number of up/down
Page 477 and 478:
# Faces # up down mfd tol 0 0 1 NAN
Page 479 and 480:
INDEX 1D geometry object 196 3D mes
Page 481 and 482:
flmesh2spline 186 flngdof 188, 191
Page 483 and 484:
second fundamental matrices 226 ser
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