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1、Exampleonusingcommercialsoftware“ICEMCFD5.1”FlowaroundacircularcylinderY.F.LinTwoDimensionalproblemsFlowaroundacircularcylinderProblemDescriptionAirflowsacrossacylinderwiththeuniformvelocity0.003m/sinthewindtunnel.Thelengthofthewindtunnel(fluiddomain)has25mlong
2、and10mheight.Thediameterofcylinderis1m.Wall(SideA)InletOutlet5DCylinderWall(SideB)Fluiddomain5D20DAssumptionandBoundaryConditions:1.2dimensionalproblems2.Steadystatecondition3.Theuniformflowvelocity4.NoHeattransfer5.Neglectthegravitationalforce6.Constantairdens
3、ityPre-processingstageInthisstage,weimplementthe“ICEMCFD”toperformthepre-processingwork.Thebasicstepsasfollow:1.Establishgeometrymodel2.Blocktheparts3.GenerationtheOgrid4.Meshthemodelandcheckqualityofmesh5.Extrudethemesh6.ResettheBC’s(boundaryconditions)7.Outpu
4、ttoCFX5.7.1CreatingGeometry1.OpenICEMCFDDoubleClickthe“ICEMCFD”Icon,afterwards,youcanseetheinterfaceoftheICEMCFD.OpenFile>NewProject…:Setthenamewith“cylinder_2d”,andClick“Save”2.CreatingGeometry:A.PointsClickbutton“CreatePoint”andthenclickbutton“ExplicitCoordin
5、ates”SetthepointsinCartesiancoordinatesystem(X,Y,Z)with(X=0,Y=0,Z=0)respectively.Click“Apply”buttonandseethescreen:apointiscreatedAtreewidgetcanbeseenatleftofthescreen(A)and(B)Thesamemethodcreatesotherpoints:X=0;Y=0.5,-0.5X=-5;Y=5,-5X=20;Y=5,-5Y=0;X=0.5,-0.5A.D
6、rawline(curve)Firstofallseethetreewidget,openModel>Geometry>PointsbyrightbuttonSelectShowPointNamesandyoucanseethenameofeachpointlikethefigureshowed.NowyoucancreatecurvesClickbutton“Create/ModifyCurve”Clickbutton“CreateCurve”Note:theleftcorneroftheblackscreen:S
7、electlocationswithleftbutton,middle=done,right=cancelSelectpointsbyusingleftbuttonofthemouse.ChangethenameofthePartwith“INLET”:SelectPONITS.05andPOINTS.06withleftbutton(A),Anddrawalinewithmiddlebutton“done”(B)andtheINLETpartiscreatedinthetreewidget.Thesamesteps
8、drawthecurvesnamed“OUTLET,SIDEA,SIDEB”withthePOINTS.07andPOINTS.08,POINTS.06andPOINTS.07,POINTS.05andPOINTS.08respectively.WewillseethelineandthetreewidgetDrawthecylinderCli
