phoenics简易案例操作步骤.docx
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phoenics简易案例操作步骤.docx
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phoenics简易案例操作步骤
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TUTORIAL-SimulationofaLabyrinthFlow.
FLAIRTutorial1:
InvestigatinglibrarycaseI203FLAIRTutorial2:
AroomwithtworadiatorsTutorial3Comfortindexinaroom
FLAIRTutorial4:
Fireinaroom
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TUTORIAL-SimulationofaLabyrinthFlow.
Thistutorialshowshowtosetupandrunthesimulationofsteadyturbulentflowofairwithheatexchange.Thegeometryis2-dimensional,of(y-direction)depth1.0m,withtheotherdimensionsshowninthefigure
below:
wherein:
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•
•
•
•
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•INLETisanaperturethroughwhichairat20degreesCentersataprescribedvelocityof0.5m/s,givinganinletReynoldsNumberof15000;OUTLETisafixed-pressureaperture,wherethepressureisheldcloseto0.0Pa,relativetotheexternalpressure;WALL-Wisanadiabaticboundarywall;WALL-Eisanadiabaticboundarywall;IN-PLATEisaninternalplate,theonlyfunctionofwhichistoobstructtheflow;IN-BLOCKisablockofcopper;H-BLOCKisablockofaluminium;L-BLOCKisablockofaluminium,supplieduniformlywith100wattsofelectricalheat.
Preliminaryremarks
1.Thetutorialmustthereforeexplainhowto:
ointroduceobjectscomprisingblocksofdifferentmaterials;
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oprovidethemwithheatsources,ifrequired;
ointroducealsoobjects(inlets,outlets,plates)havingnovolume,whichhoweveraffecttheflowinprescribed
ways;
oprescribethesizesandpositionsofeachobject.
2.Inadditiontophysically-meaningfuldataoftheabovekind,allCFDcodes,andthereforePHOENICSalso,require
non-physicalinputssuchas:
oagridofcomputationalcells;
oinstructionsabouthowmanyiterationstomakeofthetrial-and-errorsolutionprocess;
ohowmuchdatatoprint.
3.Thenon-physicalsettingssuggestedbelowaresuchastomakethecalculationsrapidratherthanaccurate.
4.Othertutorialswillbeprovidedwhichwillenableyoutoexploretheinfluencesofthesettingsonaccuracyandspeedof
calculation.
Startingthetutorial
FirstcloseanywindowswhicharealreadyrunningPHOENICSmodules.
ThenactivatethePHOENICSSatellitemodule,initsVR-Editormode,byeither:
1.clickingonthePHOENICSVRicononthedesktop;or
2.enteringtheRunModulespanelofthePHOENICSCommander,andthenclickingtheVREbutton;or
3.typing'vre'attheCommandprompt.
Yourworkingdirectory,i.e.thefolderinwhichwillappearallthefileswhichthetutorialcreates,willbe,accordingtothemethodwhichyouhaveused:
1./PHOENICS/d_priv1[Youcanchangethis,ifyouwish,byclickingthe'optionsbutton'atthetopofthesatellitepanel;
or
2.thatwhichappearsafter:
setglobdata(cwd)inthefile:
/PHOENICS/d_pc/userpref/pcprefs.[Youcanchangethis,if
youwish,byclickingthe'Customise'buttonofthePHOENICSCommanderTopPage];or
3.thatofthepromptitself.
InPHOENICS-VREditor
•
•WhentheEditorstartsexecution,whatitshowsonthescreenatfirstwilldependonwhathappenstobeinyourworkingdirectory.Youcandisregardthis.[Ifyouseethewords:
'DisplayFromCurrentQ1',clickthetop-rightXsoastoclosethepanel]Makeafreshstartby:
oclickingfirston'File';
othenon'StartNewCase';
othenon'Core';
othenon'OK'toconfirmtheresetting.
Youarenowreadytobegin.•
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Setthedomainsize
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•Clickon'Menu'or'M'(accordingtowhetherthe'Controlpanel'isvisible)[Ifitisnot,youcanmakeitsobyclickingon'View'].Set'SimulationofaLabyrinthFlow'astheTitle.Clickon'Geometry'.
Notethatclickingon'?
'atthetoprightofanypanelandthenonamenubuttonwillprovide'help'.
•
•ChangetheX-DomainSizeto2.0m.Click'OK'toclosetheGridmeshsettingsdialog.
Selecttheworkingfluid
•Clickon'Properties'whichwillelicitapagelikethis:
•Notethat
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othepropertiesarealreadythoseof"Airat20degC,1atm"bydefault.
oTheambient(external)temperatureis20degC,andtheambientpressureis0Parelativeto1atm.
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•Sincethesecorrespondtothepresentcase,thereisnosettingtomake.Clickon'Topmenu'toaccept.
Indicateforwhichvariablessolutionisrequired
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•Clickon'Models'.Leavethe'solutionforvelocitiesandpressure'ON.Clickon'energyequation',andselect'Temperature'.Clickon'OK'.Leavetheturbulencemodelssettingas'KECHEN'.Thisindicatesthatthe'KE'and'EP'(kineticenergyanddissipationrateofturbulence)aretobesolvedbytheCHENmethod.Clickon'Topmenu',thenon'OK'toexittheMainMenu.
Re-sizingthedomain
Thedomainnolongerfitsthescreen;toresize,clickonthepull-downarrownexttothe'R'icononthetoolbar;then'Fittowindow'.
Introducetherequiredobjects
•
•Clickonthe'object-management'button('O'onthetoolbarorontheControlpanel,alsosometimescalled'handset').Thiswilldisplaythe'object-management'windowwithalistofobjectsofwhichonly'DOMAIN'iscurrentlypresent.
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•
•Youwillnowintroducetheobjectswhichyourequire,one-by-one,givingeachapositionandsize,correspondingtothoseintheabovediagram.Youwillalsointroduce'attributes',forexamplematerial,velocityortemperature,socompletingthedescriptionofthe
situationtobesimulated.
1.IntroducetheH-BLOCKobject
oIntheObject-managementdialog,clickon'Object','New'and'NewObject'.oChangenametoH-BLOCK(whichstandsfor'highblock').oClickon'Size'andsetSIZEofobjectas:
Xsize:
tick'Toend'
Ysize:
tick'Toend'
Zsize:
0.05
oClickon'Place'andsetPositionofobjectas:
Xpos:
0.0
Ypos:
0.0
Zpos:
Tick'Atend'
oClickon'General'.
SelectType:
Blockage(default).
Tochangethematerial,clickon'Attributes',clickon'Types',clickonSOLIDSthen'OK',andthenon'ALUMINIUMat27degC'and'OK';.Clickon'OK'toexittheAttributesmenu,andon'OK'toclosetheObjectSpecificationDialogueBox.oH-BLOCKwillnowappearintheObject-Managementlistofobjects.
2.IntroducetheL-BLOCKobject
oClickon'Object','New'and'NewObject'.oChangenametoL-BLOCK(whichstandsfor'lowblock').oClickon'Size'andsetSIZEofobjectas:
Xsize:
tick'Toend'
Ysize:
tick'Toend'
Zsize:
0.05
oNotethatnopositioncoordinatesneedtobegivenbecausethedefaults(0.0,0.0,0.0)sufficeinthiscase.oClickon'General'.
DefineType:
Blockage(default).
Clickon'Attributes',selectmaterialasALUMINIUMasabove.SetaHEATSOURCEof100W.Clickon'Adiabatic',andselect'FixedheatFlux'.ClickonValueand
enter100.
Clickon'OK'toreturntotheObjectSpecificationDialogueBox,andon'OK'toclosetheObject
DialogueBox.
3.IntroducetheWALL-Eobject
oClickon'Object','New'andNewObject'.oChangenametoWALL-E(whichstandsfor'eastwall').oClickon'Size'andsetSIZEofobjectas:
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Xsize:
0.0
Ysize:
tick'Toend'
Zsize:
tick'Toend'
oClickon'Place'andsetPositionofobjectas:
Xpos:
tick'Atend'
Ypos:
0.0
Zpos:
0.5
oClickon'General'.
DefineType:
Plate.
NotethataPlatediffersfromaBlockageinhavingzerothickness.Clickon'OK'toclosetheObjectSpecificationDialogueBox.
4.IntroducetheWALL-Wobject
oClickon'Object','New'andNewObject'.
oChangenametoWALL-W(whichstandsfor'westwall').
oClickon'Size'andsetSIZEofobjectas:
Xsize:
0.0
Ysize:
tick'Toend'
Zsize:
0.5
oNotethatnopositioncoordinatesneedtobegivenbecausethedefaults(0.0,0.0,0.0)sufficeinthiscase.oClickon'General'.
DefineType:
Plate.
Clickon'OK'toclosetheObjectSpecificationDialogueBox.
5.IntroducetheIN-PLATEobject
oClickon'Object','New'andNewObject'.
oChangenametoIN-PLATE(whichstandsfor'interiorplate').
oClickon'Size'andsetSIZEofobjectas:
Xsize:
0.0
Ysize:
tick'Toend'
Zsize:
0.65
oClickon'Place'andsetPositionofobjectas:
Xpos:
0.5
Ypos:
0.0
Zpos:
0.3
oClickon'General'.
DefineType:
Plate.
Clickon'OK'toclosetheObjectSpecificationDialogueBox.
6.IntroducetheIN-BLOCKobject
oClickon'Object','New'andNewObject'.
oChangenametoIN-BLOCK(whichstandsfor'interiorblock').
oClickon'Size'andsetSIZEofobjectas:
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Xsize:
0.4
Ysize:
tick'Toend'
Zsize:
0.65
oClickon'Place'andsetPositionofobjectas:
Xpos:
1.0
Ypos:
0.0
Zpos:
0.05
oClickon'General'.
DefineType:
Blockage(default).
Clickon'Attributes',thenon'Othermaterials',select'Solids'thenCOPPER.Clickon'OK'toreturntotheObjectDialogueBox,oandon'OK'toclosetheObjectDialogueBox.
7.IntroducetheINLETobject
oClickon'Object','New'andNewObject'.oChangenametoINLET.
oClickon'Size'andsetSIZEofobjectas:
Xsize:
0.0
Ysize:
tick'Toend'
Zsize:
0.45
oClickon'Place'andsetPositionofobjectas:
Xpos:
0.0
Ypos:
0.0
Zpos:
0.5
oClickon'General'.
DefineType:
Inlet.
Clickon'Attributes'andsetthevelocityinX-directionto0.5m/s.Leavethetemperatureat'Ambient',20degreesCfortheinflowingair.Clickon'OK'toclosetheAttributesmenu,andon'OK'intheObjectSpecificationDialogueBox.
8.IntroducetheOUTLETobject
oClickon'Object','New'andNewObject'.oChangenametoOUTLET.
oClickon'Size'andsetSIZEofobjectas:
Xsize:
0.0
Ysize:
tick'Toend'
Zsize:
0.45
oClickon'Place'andsetPositionofobjectas:
Xpos:
tick'Atend'
Ypos:
0.0
Zpos:
0.05
oClickon'General'.
DefineType:
Outlet.
Leavethedefault
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