COMSOL Multiphysics™

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hexahedron2, hexahedron3 Purpose hexahedron2, hexahedron3 Create bilinear hexahedron geometry object. Syntax Description h2 = hexahedron2(p) h3 = hexahedron3(p) h3 = hexahedron3(p) creates a solid hexahedron object with corners in the 3D coordinates given by the eight columns of p. hexahedron3 is a subclass of solid3. h2 = hexahedron2(p) creates a surface hexahedron object with corners in the 3D coordinates given by the eight columns of p. hexahedron3 is a subclass of face3. For a hexahedron approximately aligned to the coordinate planes, the points in p are ordered as follows. The first four points and the last four points projected down to the (x,y)-plane defines two negatively oriented quadrangles. The corresponding plane for the second quadrangle must lie above the plane of the first quadrant in the z-direction. Generally oriented hexahedra have the points of p ordered in a similar way, except for a rigid transformation of the defining point set. The default value of p is p=[0 0 1 1 0 0 1 1; 0 1 1 0 0 1 1 0; 0 0 0 0 1 1 1 1] The 3D geometry object properties are available. The properties can be accessed using the syntax get(object,property). See geom3 for details. Example The following command generates a solid hexahedron object. h3 = hexahedron3([0 0 1 1 0 0 1 1;... 0 0.8 1 0 0 1 1.2 0;... 0 0.1 0 0.2 1 1 2 1]); See Also face3, geom0, geom1, geom2, geom3 242 | CHAPTER 1: COMMAND REFERENCE
line1, line2 Purpose line1, line2 Create polygons. Syntax Description c = line1(x,y) s = line2(x,y) s = line2(x,y) creates a 2D solid object s in the form of an solid polygon with vertices given by the vectors x and y. c = line1(x,y) creates a 2D curve object c in the form of an open polygon with vertices given by the vectors x and y. Examples The commands below create an open regular n-gon (n=11) and plot it. n = 11 xy = exp(i*2*pi*linspace(0,1-1/n,n)); l = line1(real(xy),imag(xy)); geomplot(l) See Also arc1, arc2, circ1, circ2, ellip1, ellip2, geomcsg, poly1, poly2 243
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COMSOL Multiphysics COMMAND REFERE
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CONTENTS Chapter 1: Command Referen
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femplot . . . . . . . . . . . . . .
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postarrow . . . . . . . . . . . . .
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BSplineSurf . . . . . . . . . . . .
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1 Command Reference 1
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elpconstr on page 99 elplastic on p
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mirror on page 301 move on page 302
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Commands Grouped by Function User I
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Geometry Objects FUNCTION block2 bl
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Mesh Functions FUNCTION femmesh flc
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Postprocessing Functions FUNCTION m
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FUNCTION elmapextr elmesh elode elp
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FUNCTION PURPOSE REPLACEMENT flsdt
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In FEMLAB 3.0, all FEMLAB 2.3 Eleme
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adaption TABLE 1-1: VALID PROPERTY/
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adaption Convergence Control No mor
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adaption fem.bnd.ind = [1 1 2 2 2 2
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adaption The Coefficient residual c
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assemble Purpose assemble Assemble
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assemble matrix contribution (from
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assemble In FEMLAB 2.3, the size of
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asseminit TABLE 1-3: VALID PROPERTY
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lock2, block3 Purpose block2, block
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chamfer Purpose chamfer Create flat
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circ1, circ2 Purpose circ1, circ2 C
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comsol Purpose comsol Start the COM
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cone2, cone3 Cone objects have the
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curve2, curve3 The coercion functio
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cylinder2, cylinder3 TABLE 1-13: CY
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econe2, econe3 Purpose econe2, econ
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elcconstr Purpose elcconstr Define
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elcontact Purpose elcontact Define
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elcontact See Also elmapextr 57
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elcplextr transformation is used as
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elcplgenint Purpose elcplgenint Def
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elcplproj Purpose elcplproj Define
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elcplproj map1.dg = '1'; map1.dv =
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elcplscalar el.elem = 'elcplscalar'
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elempty Purpose elempty Define some
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elempty clear el; el.elem = 'elempt
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elepspec Examples Given a single-ge
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eleqc Make sure that the integratio
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eleqw fem.elem = [fem.elem {el}]; f
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elgeom Purpose elgeom Define geomet
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elgpspec elgpspec can be added in t
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elinline el.dexpr = {'1/(2*sqrt(a)+
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elinterp el.elem = 'elinterp'; el.n
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elirradiation Purpose elirradiation
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ellip1, ellip2 Purpose ellip1, elli
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ellipsoid2, ellipsoid3 Purpose elli
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elmapextr Purpose elmapextr Define
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elmapextr fem.sol = femeig(fem,'nei
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elode Purpose elode Define global s
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elpconstr Purpose elpconstr Define
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elplastic Purpose elplastic Define
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elpric Purpose elpric Define variab
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elsconstr vector. The normal compon
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elshape TABLE 1-20: BASIC MESH ELEM
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elshell_arg2 Purpose elshell_arg2 C
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elshell_arg2 Postprocessing variabl
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elvar Purpose elvar Define expressi
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extrude Purpose extrude Extrude a 2
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face3 Purpose face3 Create 3D surfa
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femdiff Purpose femdiff Symbolicall
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femeig Purpose femeig Solve eigenva
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femeig where Ω is the L-shaped mem
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femlin KN T N 0 U - U 0 Λ = L M ,
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femlin nullfun and symmetric can be
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femmesh Purpose femmesh Create a me
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femmesh Tetrahedral element (tet):
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femmesh FACE (EDGE NODES) FACE MID
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femnlin Purpose femnlin Solve nonli
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femnlin components fixed, the augme
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femnlin The property Rstep sets a r
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femplot PROPERTY VALUE DEFAULT DESC
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femsim The names of the input varia
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femsim Most of the FEMLAB 2.3 data
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femsol Example Create a solution ob
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femsolver TABLE 1-30: COMMON SOLVER
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femsolver PROBE PLOT PARAMETERS Pro
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femsolver Equations” on page 440
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femsolver TABLE 1-33: DIRECT LINEAR
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femsolver TABLE 1-34: ITERATIVE LIN
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femsolver scalar Shapechg, and the
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femsolver TABLE 1-36: OBSOLETE PROP
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femstate with the property State=on
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femstatic dependent and if these ma
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femtime Purpose femtime Solve time-
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femtime initial values are consiste
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femtime Cautionary In structural me
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femwave and then transforms the PDE
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femwave Weak coefficients are cell
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fillet Purpose fillet Create circul
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flcontour2mesh Purpose flcontour2me
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flform Purpose flform Convert betwe
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flim2curve Purpose flim2curve Creat
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flload Purpose flload Load a COMSOL
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flmesh2spline figure meshplot(msh)
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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: getparts Purpose getparts Extract p
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
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meshrevolve Purpose meshrevolve Rev
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meshsmooth Purpose meshsmooth Smoot
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meshsweep Purpose meshsweep Create
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meshsweep • There can only be one
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mirror Purpose mirror Reflect geome
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multiphysics Purpose multiphysics M
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multiphysics The table below descri
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multiphysics which domain group in
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multiphysics Elements of fem1.***.(
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multiphysics Fem.***.init is constr
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pde2geom Purpose pde2geom Convert a
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point1, point2, point3 Purpose poin
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poisson Purpose poisson Fast soluti
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poly1, poly2 Purpose poly1, poly2 C
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postarrow postarrow Purpose Shortha
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postcont postcont Purpose Shorthand
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postcoord fem.xmesh = meshextend(fe
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postcrossplot points for the differ
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postcrossplot TABLE 1-24: VALID PRO
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postcrossplot postcrossplot(fem,2,6
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posteval Purpose posteval Evaluate
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posteval Solnum is provided, the so
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postflow postflow Purpose Shorthand
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postglobaleval % Evaluate 'r+f' and
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postglobalplot If Outtype is 'handl
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postint Purpose postint Integrate e
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postinterp Purpose postinterp Evalu
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postinterp The property Phase is de
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postlin postlin Purpose Shorthand c
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postmin Purpose postmin Compute min
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postmovie TABLE 1-30: VALID PROPERT
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postplot TABLE 1-31: VALID PROPERTY
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postplot associated to each point o
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postplot fem.equ.c = 1; fem.equ.f =
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postprincbnd postprincbnd Purpose S
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postsurf postsurf Purpose Shorthand
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pyramid2, pyramid3 Purpose pyramid2
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ect1, rect2 Purpose rect1, rect2 Cr
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evolve Purpose revolve Revolve a 2D
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otate e1 = ellip2(0,0,1,3); e2 = ro
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sharg_2_5 Purpose sharg_2_5 Create
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shcurl Purpose shcurl Create a vect
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shdisc Purpose shdisc Create a disc
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shgp Purpose shgp Create a Gauss-po
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shlag Purpose shlag Create a Lagran
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solid0, solid1, solid2, solid3 The
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sphere3, sphere2 the evaluation con
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square1, square2 Purpose square1, s
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tangent Purpose tangent Create a ta
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tetrahedron2, tetrahedron3 Purpose
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torus2, torus3 TABLE 1-49: TORUS OB
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xmeshinfo is requested for. The pro
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xmeshinfo TABLE 1-52: NODES STRUCT
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xmeshinfo dofs.coords(:,30) % alter
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2 Diagnostics This chapter contains
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TABLE 2-2: GEOMETRY MODELING ERROR
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6000-6999 Assembly and Extended Mes
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TABLE 2-4: ASSEMBLY AND EXTENDED ME
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TABLE 2-5: SOLVER ERROR MESSAGES ER
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9000-9999 General Errors TABLE 2-6:
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Solver Error Messages These error m
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TABLE 2-7: SOLVER ERROR MESSAGES IN
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3 The COMSOL Multiphysics Files Thi
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2 m1 ######## Types 1 # number of t
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To load and save COMSOL Multiphysic
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Attribute Attribute Supported Versi
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BezierMfd BezierMfd Supported Versi
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BezierTri BezierTri Supported Versi
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BSplineMfd BSplineMfd Supported Ver
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BSplineSurf BSplineSurf Supported V
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Ellipse 0 # reverse 2 0 # major axi
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Geom1 Geom1 Supported Versions 1 Su
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Geom2 0 0 1 1 2.2999999999999998 1
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GeomFile GeomFile Supported Version
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Mesh Mesh Supported Versions 1 Subt
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MeshCurve MeshCurve Supported Versi
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Plane Plane Supported Versions 1 Su
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Serializable Serializable Supported
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Transform Transform Supported Versi
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VectorInt Supported Versions Vector
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Examples To illustrate the use of t
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410 506 409 528 762 760 831 859 525
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7 ... 5 5 5 224 # number of up/down
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# Faces # up down mfd tol 0 0 1 NAN
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INDEX 1D geometry object 196 3D mes
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flmesh2spline 186 flngdof 188, 191
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second fundamental matrices 226 ser
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