Introduction to Comsol

8/9/2019 Introduction to Comsol

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COMSOL -Remote Connection

,indows user&o launch remote des%top

-&$R&

R1 t2pe mstsc.e4e

Or in Vista

-tart

$ll 5rograms

$ccessories Remote Des%top Connection

se 2our !CC login and password.

6ou will 7e connected remotel2 to !CC machines

ac or #inu4 user

3

terminal-1.chemeng.utah.edu

terminal-2.chemeng.utah.eduterminal-3.chemeng.utah.eduterminal-4.chemeng.utah.edu

terminal-5.chemeng.utah.eduterminal-6.chemeng.utah.eduterminal-7.chemeng.utah.edu

terminal-8.chemeng.utah.eduterminal-9.chemeng.utah.eduterminal-10.chemeng.utah.eduterminal-

Search for the software ou need

on line
http://www.che.utah.edu/wpcms/?page_id=308mailto:[email protected]://www.che.utah.edu/wpcms/?page_id=308


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Connecting with Windows 7

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Connecting from OSX (Tested on 10.8)

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Connecting from Windows XP

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COMSOL!."

www.comsol.com

!ac"ground and a##lications of $%&S%' (ree )e*inar+ http://www.comsol.com/events/webinars/

(ree tutorial $,s

#dated information


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COMSOL Application

You can use COMSOL Multiphysics in many application

areas, just a few examples being:

9 Chemical reactions

9 Diffusion9 lui! !ynamics

9 uel cells an! electrochemistry

9 "ioscience

9 #coustics

9 $lectromagnetics

9 %eophysics
http://www.comsol.com/http://www.comsol.com/events/webinars/http://www.comsol.com/


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COMSOL Application

9 &eat transfer9 Microelectromechanical systems 'M$MS(9 Microwa)e engineering9 Optics

9 *hotonics9 *orous me!ia flow9 +uantum mechanics9 a!io-fre.uency components

9 Semicon!uctor !e)ices9 Structural mechanics9 /ransport phenomena9 0a)e propagation


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The COMSOL Modules

12 #C3DC Mo!ule

42 #coustics Mo!ule

52 Chemical $ngineering Mo!ule

62 $lectrochemistry

72 lui! flow

82 &eat transfer92 *lasma

2 a!io fre.uency

;2 Structural mechanics

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The Chemical Engineering Module

/he Chemical $ngineering Mo!ule presents a powerful way of

mo!eling e.uipment an! processes in chemical engineering2

>t pro)i!es customi=e! interfaces an! formulations for

momentum, mass, an! heat transport couple! with chemical

reactionsfor applications such as:

9 eaction engineering an! !esign

9 &eterogeneous catalysis

9 Separation processes

9 uel cells an! in!ustrial electrolysis

9 *rocess control together with Simulin?


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COMSOL Multiphysics excels in sol)ing systems of couple!

nonlinear *D$sthat can inclu!e:

9 &eat transfer

9 Mass transfer through !iffusion an! con)ection9 lui! !ynamics

9 Chemical reaction ?inetics

9@arying material properties

/he multiphysics capabilities of COMSOL can fully couple an!

simultaneously mo!el flui! flow, massan! heat transport,

an! chemical reactions2


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>nfluid dynamicsyou can mo!el flui! flow throughporous me!ia

or characteri=e flow with the Aa)ier-Sto?es e.uations2

>t is easy to represent chemical reactionsby sourceor sin?terms

in mass an! heat balances2

#ll formulations exist for both Cartesianan! Cylindrical

coor!inates 'for axisymmetric mo!els( as well as for stationary

an! time-!epen!ent cases2


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/he a)ailable application mo!esare:

12 Momentum balances

9 >ncompressible Aa)ier-Sto?es e.uations

9 DarcyBs law9 "rin?man e.uations

9 Aon-Aewtonian flow

9 Aonisothermal an! wea?ly compressible flow

9 /urbulent flow, ?- turbulence mo!el

9 /urbulent flow, ?- turbulence mo!el

9 Multiphase flow


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42 $nergy balances

9 &eat con!uction

9 &eat con)ection an! con!uction

52 Mass balances

9 Diffusion

9 Con)ection an! !iffusion

9 $lectro?inetic flow

9 Maxwell-Stefan !iffusion an! con)ection

9 Aernst-*lanc? transport e.uations


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The Modeling Process

/he mo!eling process in COMSOL consists ofsix main steps:

12 Selecting the appropriate application modein theModel

Navigator2

42 Drawing or importing the mo!elgeometryin the DrawMo!e2

52 Setting up thesubdomaine.uations an! boundarycon!itions

in the *hysics Mo!e2

4. Meshingin the Mesh Mo!e2

5. Solvingin the Sol)e Mo!e2

6. Postprocessingin the *ostprocessing Mo!e2

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1. The Model Navigator

0hen starting COMSOL Multiphysics, you are greete! by the

Model Navigator2 &ere you begin the mo!eling process an!

control all program settings2 >t lets you select space !imension

an! application mo!esto begin wor?ing on a new mo!el, open

an existing mo!el you ha)e alrea!y create!, or open an entry

in the Mo!el Library2

COMSOL Multiphysics pro)i!es an integrate! graphical user

interface where you can buil! an! sol)e mo!els by using

pre!efine! physics mo!es

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. Creating !eometr"

#n important part of the mo!eling process is creating the

geometry2 /he COMSOL Multiphysics user interface contains

a set of C#D toolsfor geometry mo!eling in 1D, 4D, an! 5D2

/he C#D >mport Mo!ulepro)i!es an interface for import of

*arasoli!, S#/ '#C>S(, S/$*, an! >%$S formats2

>n combination with the programming tools, you can e)en use

images an! magnetic resonance imaging 'M>( !ata to create a

geometry2

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A#es and !rid

>n the COMSOL Multiphysics user interface you can set limits

for the mo!el axes an! a!just the gri! lines2 /he gri! an!

axis settingshelp you get just the right )iew to pro!uce a

mo!el geometry2 /o change these settings, use the #xes3%ri!

Settings!ialog box that you open from the Optionsmenu2

You can also set the axis limits with the =oom functions2

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A#es and !rid

/he !efault names for coor!inate systems )ary with the space

!imension:

Mo!els that you open using the space !imensions 1D, 4D,

an! 5D use the Cartesian coor!inates x, y, an! =2

>n 1D axisymmetric geometries the !efault coor!inate is r,

the ra!ial !irection2 /he x-axis represents r2

>n 4D axisymmetric geometries the x-axis represents r, thera!ial !irection, an! the y-axis represents =, the height

coor!inate2

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$. Modeling Ph"sics and E%uations

rom thePhysicsmenu you can specify all the physics an!

e.uations that !efine a mo!el inclu!ing:

9 "oun!ary an! interface con!itions

9 Domain e.uations

9 Material properties

9 >nitial con!itions

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&. Creating Mesh

0hen the geometry is complete an! the parameters are !efine!,

COMSOL Multiphysics automatically meshes the geometry2

&owe)er, you can ta?e charge of the mesh-generation process

through a set of control parameters2

or a 4D geometry the mesh generator partitions the

sub!omains into triangularor .ua!rilateralmesh elements2

Similarly, in 5D the mesh generator partitions the sub!omains

into tetrahe!ral, hexahe!ral, orprismmesh elements2

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'. Solution

Aext comes the solution stage2 &ere COMSOL Multiphysics

comes with a suite of sol)ers for stationary, eigen)alue, an!

time-!epen!entproblems2

or sol)ing linear systems, the software features both !irectan!iterati)esol)ers2 # range of precon!itioners are a)ailable for

the iterati)e sol)ers2 COMSOL sets up sol)er !efaults

appropriate for the chosen application mo!e an! automatically

!etects linearity an! symmetry in the mo!el2

# segregate!sol)erpro)i!es efficient solution schemes for large

multiphysics mo!els, turbulence mo!eling, an! other

challenging applications2

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(. Postprocessing

or postprocessing, COMSOL pro)i!es tools for plotting an!postprocessing any mo!el .uantity or parameter:

9 Surface plots

9 Slice plots

9 >sosurfaces9 Contour plots

9 #rrow plots

9 Streamline plots an! particle tracing

9 Cross-sectional plots

9 #nimations

9 Data !isplay an! interpolation

9 >ntegration on boun!aries an! sub!omains

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)eport !enerator

/o !ocument your mo!els, the COMSOL eport %enerator

pro)i!es a comprehensi)e report of the entire mo!el,

inclu!ing graphics of the geometry, mesh, an! postprocessing

.uantities2

You can print the report !irectly or sa)e it as an &/ML file for

)iewing through a web browser an! further e!iting2

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$omsol &ulti#hsics 4.2

etting Started

&ust *e "nown

/ro#erties of theuidmaterial

%* ectie of the ro*lem

COMSOL -Example

Flow Past theCylinder

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am#le+ (low /ast a $linder- !enchmar" test for$(, algorithms

nstead incom#ressi*le ow

$linder+ % center otherwise stead statesmmetric ow

)a"e formation-nordered eddies

'arge drag on *od

Re2nolds ; 7ased on c2linder diameter

(. -low 'low 7elow Re ; (00" stead2 'low start with this to correct simple errors andmista%es"


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Select S#ace ,imension+

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Select &ode+

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,e;ne the #arameters+

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eometr &aterial and !oundar+

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Rectangle 1

1 In the o!el "#il!er win!ow$ ri%ht&clic' o!el 1()eometr* 1 an!

choose +ectan%le.

2 )o to the ,ettin%s win!ow -or +ectan%le.

3 ocate the ,ie section. In the i!th e!it -iel!$ t*pe 2.2.

4 In the ei%ht e!it -iel!$ t*pe 0.4.

Circle 1

1 In the o!el "#il!er win!ow$ ri%ht&clic' )eometr* 1 an! choose ircle.

2 )o to the ,ettin%s win!ow -or ircle.

3 ocate the osition section. In the e!it -iel!$ t*pe 0.2.

4 In the * e!it -iel!$ t*pe 0.2.

5 ocate the ,ie an! ,hape section. In the +a!i#s e!it -iel!$ t*pe 0.05.

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Difference 1

1 +i%ht&clic' )eometr* 1 an! choose i--erence.

2 )o to the ,ettin%s win!ow -or i--erence.

3 ocate the i--erence section. n!er bects to a!!$ clic' ctivate ,election.

4 ,elect the obect r1 onl*.

5 n!er bects to s#btract$ clic' ctivate ,election.

6 ,elect the obect c1 onl*.

7 In the o!el "#il!er win!ow$ ri%ht&clic' )eometr* 1 an! choose "#il! ll.

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M A T E R I A L S

aterial 1

1 In the o!el "#il!er win!ow$ ri%ht&clic' o!el 1(aterials an! choose aterial.

2 )o to the ,ettin%s win!ow -or aterial.

3 ocate the aterial ontents section. In the aterial contents table$ enter the

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Inlet 1

1 In the o!el "#il!er win!ow$ ri%ht&clic' o!el 1(aminar low an! choose Inlet.

2 ,elect "o#n!ar* 1 onl*.

3 )o to the ,ettin%s win!ow -or Inlet.

4 ocate the ;elocit* section. In the 0 e!it -iel!$ t*pe

1&s?=step1>t@1/sA?.

Outlet 11 In the o!el "#il!er win!ow$ ri%ht&clic' aminar low an! choose #tlet.

2 ,elect "o#n!ar* 4 onl*.

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M E S H :1 In the o!el "#il!er win!ow$ clic' o!el 1(esh 1.

2 )o to the ,ettin%s win!ow -or esh.

3 ocate the esh ,ettin%s section. rom the Blement sie list$ select iner.

4 lic' the "#il! ll b#tton.

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Step 1: Time Dependent

1 In the o!el "#il!er win!ow$ epan! the ,t#!* 1 no!e$ then clic' ,tep 1: Cime epen!ent.

2 )o to the ,ettin%s win!ow -or Cime epen!ent.

3 ocate the ,t#!* ,ettin%s section. In the Cimes e!it -iel!$ t*pe ran%e>0$0.2$3.4? ran%e>3.5$0.02$7?.

4 In the o!el "#il!er win!ow$ ri%ht&clic' ,t#!* 1 an! choose ,how e-a#lt ,olver.

5 Bpan! the ,t#!* 1(,olver on-i%#rations no!e

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Solver 11 In the o!el "#il!er win!ow$ epan! the ,t#!* 1(,olver on-i%#rations(,olver 1

no!e$ then clic' Cime&epen!ent ,olver 1.

2 )o to the ,ettin%s win!ow -or Cime&epen!ent ,olver.

3 lic' to epan! the Cime ,teppin% section.

4 rom the ,teps ta'en b* solver list$ select Interme!iate.

5 In the o!el "#il!er win!ow$ ri%ht&clic' ,t#!* 1 an! choose omp#te.

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Solver


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elocit!:

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"re##ure:

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"o#t "roce##ing $"article Tracing%&&&&&&&:

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An! 'ue#tion

Documents

Introduction to Comsol