fluent课程设计论文

1、计算流体动力学 院 姓 学 课程论文 系：能源与化工系 名： 号： 提交日期: 前处理利用GAMBIT建立计算模型 创建坐标网格图 Display Grid Coordinate Sys |ic_svs.1 F Visibility B I ffl I B I 田 I 41 I Plane XZ Axis * X V Z offset Maximum Minimum XYjJiane X Values 350 a Delete I 360 1 370 Unselect | 3S0 390 Delete All| 40C J 7 Update list | Increment Valwe: Op

2、 tions; Snaf) Grid:* Lines y Points dose 图1网格显示设置对话框 图2网格显示设置对话框 Apply I Reset ir . fe 1 $ 图3创建节点 第2步由节点创建直线 (1) 隐藏坐标网格 图4创建直线的节点 图5创建直线对话框 Apply I Reset 图6 创建直线 (2) 由节点连成直线(边界线) create Straight Edge Vertices I Type:* Real y Virtual 叫；上匸竺_二！JP Label ose 第3步创建小管嘴 (1) 创建小管嘴入口边节点 Move / Copy Vertices V

3、ertices Pick _i I 卜ertex4 # Move * copyp Op eratian: * Translatey Rot ala V Reflect乂 Scale Coordinate Sys. |：c_s/.1 Global Local J：的 X： po *=輒1 r: IT 斗 R Type 匚 arts naxinun uolume 53): total uolume (n3): Face area statistics: nininun face area Cr2) : 4-*97102e+000 naxinum face area (n2): 1.257327e+

4、a01 Checking Checking Checking Checking Checking Checking Checking Checking Checking Checking Checking Checking Checking Checking Checking Checking Checking Checking Done. number number thread number OF node弓 per of faces peF pointers. OF cells per cell, cell. face. face cells- bridge faces. right-h

5、anded cells. face handedness. elenent typm consistency. boundary type; face pairs- periodic boundaries, node count. nosolup cell count, nosolue Fdce count. face children, cell childr&n. storage. 图25读入网格文件的信息反馈 (4) 网格信息 Grid Size LeuelCellsFacesModesPartitions 02295 092811 图26网格信息 (5) 平滑网格 Smooth Smo

6、oth/Swa p Grid Swap Info Method skewness Number Swapped a Number Visited 407 Minimum Skewness Number of Iterations Smooth Swa p Close Help | 图27平滑与交换网格对话框 1 cell zone, S face zones- No nodes noued, smoothing conplEtg_ Don?. Number faces suapped： Q Nunb&r faces uisited: U07 图28光滑与交换网格 (6) 确定长度单位 Scal

7、e Grid Scale Factors Unit Conversion X D,al Grid Was Created In |cm Change Length Units Domain Extents Xmtn (cnk| fe Xmax (cm| Ymin (cm q Ymax (cm| 阿 ScAle UnecAle Claae Hiilp I 图29长度单位设置对话框 (7) 显示网格 图30显示网格对话框 第3步设置流体的物理属性 图31 管道网格图 建立求解模型 (1)设置求解器 Soiver Salver G Segregated L Coupled Formulation 存

8、 Implicil 厂 Explicit Space V 20 L Axisymmclric Ayiymmelrlc Swirl 广JD Tiirie Stcatiy I 厂 Unslcsdy Velocity Formulation W Afasalutr 厂 Relallve Gradient Option & Ccll-Osscd 厂 Mndc-Qustd Porous Formulation 存 Supcrlicial Vdowty 厂 Physicul Vclncily OK I Cane训Help | 图32 求解器设置对话框 (2)选择湍流模型 r (T r r r r Visc

9、ous Model Model Inviscid Laminar Spalflrt-Allmaras (1 eqn| k-epsilon |2 eqn k-omega (2 eqn) Reynolds Stress 5 eqn| OK Cancell I Help 图33湍流模型选择对话框 Vrous Mcxiel Uodel r r r 広 r r Laminar pakrl-Allmara? |1 eqn h-cpsilvn |E rqn k-arnega 2 cqn AcynOtde &trc3t f5 eqn| tc-r|ivilvii Mu del 左 Slflndard nc J

10、Ufier-Dtflneil FuncUeng Tinbl口rt Yi占B右雌 J Ncar-Wall rrcalmcnl 矣別勺NbfOW汕 Fuoclicn$ 厂 Nan-Equilibrium WjII FunclionE 厂 Enhanced Wall Trealmenl PK II nl I H邮 H 图34湍流模型设置对话框 (3)选择能量方程 EriErgy Energy Energy Equation OK Cancel I Help I 图35能量方程设置对话框 Name Iwdter Materials Maicrial Type I fluid Chemical Form

11、ula Fluent Ruid Maicnals Order Mate Hals By r Name ChrmicflI Formula Fluent Dalabse. LlpHjre User-Defined Databaee. none Prop crIicB Cp U/to M enn吕1曷nl J I Edit 19Ue con slam+ dh”， constant J I Fdit. |s.6 conslnl I I Edi 爲” Density 炖恤刖 Thermal Conductivity fw/m-k) Vi&cusity (kg/m-sj o,nei ChangeCrea

12、te Delete Close Help 图36流体材料设置对话框 设置边界条件 Boundary Conditions ID Idelault-irleriDi fluid ikjid solid inlet 1 inler2 Dullel w/all Zone Type Sel I Cop” I Close | Help 图37边界条件设置对话框 (1)设置工作流体为水 Fluid 图39 速度边界1设置对话框 water Edit. Zone Name fluid Material Name Source Terms Fixed Values Porous Zone LaminarZon

13、e Motion Source Terms | Fixed Values | Porous Zone | Reaction Rotation-Axis Origin Y (cm 0 Motion Type Siationary OK Cancel I Help | 图38流体设置对话框 (2)设置冷水入口速度边界条件 Velocity Inlet Zone Name inlet 1 Velocity Specification Method Magnitude, Normal to Boundary Reference Frame Absolute I constant constant Ve

14、locity Magnitude (mfs) 3.2 Ternperature (k) 293 Turbulence Specification Method Intensity and Hydraulic Diameter Turbulence Intensity (%) 5 Hydraulic Diameter (cm)戶耳 OK Cancel Help (3)用同样方法对inlet_2进行设置 Velocity InletX Zone Name inlet 2 Velocity SpEuific玳inn Method Magnilude Normal to Boundary Refere

15、nce Frsme Absolute Velocity Magnitude (m/s) a.2 constant Ternperaturu k) 293 constant Turbulence Specification Method intensity and Hydraulic Diameter Turbulence Intensity %) 5 Hydraulic Diameter (cm) 20( OK Cancel Help I 图40速度边界2设置对话框 (4)为出流口设置压力出流边界条件 Pressure Outlet Zone Name outlet constant cons

16、lant Gauge Pressure pascal q Backflow Total Temperature (k qb Backflow Direction Specification Method Normal to Boundary Turbulence Specification Method intensity and Hydraulic Diameter Backflow Turbulence Intensity |%| 5 Backflow Hydraulic Diameter (cm)乔 厂 Target mass-flow rate OK Cancel Help 图41压力

17、出流边界条件设置对话框 (5)设置壁面边界 X 3 Zone Name ualll Adjacent Cell Zone Fluid Thermal | DPM | Momentum Speties | Radiation UDS I Granular | Thermal Condillons r r c c Heat Flux Temp erature Convection Radialion Mlixed Material Name aluminum Heal Flux Wall Thickness cm 2B0 Heat Generation Rate |岬mJ |g Edit*” I

18、constant I con slant Zone Name wall2 Adjacenl Cell Zone Fluid Thermal | DPM Momentum Species Radialion | UDS | Granular Thermal ConditionE r (! r r r Heat Flux Tem peraturc Convedion Radiation Mixed Tcmpcraturc (k)丽 Wall Thickness (cm) o Heat Generation Rate (w/ni3) o constant constant Material Name

19、 aluminum Edit OK Cancel 图43壁面边界2设置对话框 WallX Zone Name |uall3 Adjacent Cell Zone Material Name dFuminum 耳 Edil. fluid Thermal DPM 1 Momentum | Speciee | Radiation | UDS 1 Granubr | Thermal CanditionE Heal Flux 广 Temperature 广 Canvcction 厂 Radiation 厂 Mixed Heal Flux (w/in2) s 1 constant J Wall Ihtck

20、ness |crTi| 0 Heat Generation Rate e |cDnelant T 图45壁面边界4设置对话框 QK I CancEl I Help 图44 壁面边界3设置对话框 wail Zone Name 毋 alia fluid Thermal DPM | MomEnlum | Speclefi | Radiation | UDS Thermal Conditions Heal Flux 广 Temperature 厂 Convection 厂 Radiation Mixed Heat Flux fw/mZ Wall Thickness (cm) Heat Generali

21、on Rate fw/m3J Adjacent Cell Zone I Granular | 0 0 0 Malerial Name conslanl conslanl Edit,. aluminum OK Cancel Help X Wall 图47求解控制设置对话框 Zone Name uall5 Adjacent Cell Zcne Fluid Thermal DPM | Momentum | Species 1 Radiation J UDS j Granular j Heat Generation Rate constanl Temperature (k) Wall Thicknes

22、s (cm) |cDn3tBn1 Thermal Conditions Heal Flux 席 Temperature L Convection 厂 Radiation u Mixed Material Name laluminum QK I Cancel | HiHp | 图46 壁面边界5设置对话框 第5步迭代求解 (1)设置求解控制参数 EquaHana Solution Controls 亘I旦 UndenRclaxalton Factors Pressure 0.3 Density 5 Body Forces 斤 Momentum 0.7 Pressure-Velocity Coup

23、lling Discretization SIMPLE Pressure standard Momentum first Order Upwind Turbulente Kinetic Energy First Order Upwind Turbulence Dissipation Rate First Order Upwmd OK Default Cancel Htip (2)流场初始化 Solution InitializationX inlet_2 席 Relative to Cell Zone 厂 Absolute Initial Values Gauge Pressure pasca

24、l) X Velocity (m/s) 0 Q Compute From Reference Frame -0_2 Turbulence Kinetic Energy ni2/s2) Init Reset Appldl Close 图48流场初始化对话框 (3) 设置残差监测器 Residual Monitors Qp tiions Storage Plotting R Print 臣 Plot Met ations 10QO Window fo Normalization Iterations ioqq 厂 Normalize Scale Axes Curves. Residual cont

25、inuity x-uelocit| p-uelocity energy 0.001 PI 0.001 卡I |o.aoi 1e-06 而I 0.Q01 CheckConve rgence Monitor Convergence Criterion OK Plot I Renorm Cancel I Help 图49残差监测器设置对话框 (4) 设置监视器 Surface MonitorsX Surface Monitors H Plot Print Write jmonitor-l r 厂 |nionitor-2 r 厂 r |nionitor-3 r r 厂 Imonitor-li 厂 r

26、r Name Iteration Iteration Iteration deration OK Cancel | Hkl|)| Define. Define Define. I 图50表面监视器设置对话框 Define Surface Monitor X 图51表面监视器定义对话框 (5)保存文件(201241102132.caS (6)开始迭代计算 图52迭代参数设置对话框 Residuate continuity x-velocity y-velodty sntrgy k epsilon Ib-KH U4W 1-02 Ifi-OS ID 13 15 ie 20 Iterations 图5

27、3 残差监测曲线 Monilore mofiitor-1 235.1900 Area Weighted Avera 29S.UCD 29S.120D 295.1CWD 235.Q340 295.04flD 295.0MD Ite raftion 图54 出口平均温度监测曲线 (7) 放大截面温度监测曲线 Axes - Surface Monitor Plot Axis Number Format Major Rules flaal foreground Label Precision J/eight Log Minimum Cnlnr Auto Range 厂 Major Rules dair

28、k gray J 厂 Minor Rules Maximum Weiyihl |295,16| P Qp lions Range Minor Rules Apply Close I Help I 图55轴向曲线放大设置对话框 (8) 调整残差临界值 X Residual Monitors Options 臣 Print 17 Plot Storage Plotting Herat! ons 1000 Window 0 Normallization Iterations 1 QQO 厂 Normalize 两 Scale Axes. I Curves Residual CheckConverge

29、nce * Monitor Convergence Criterion continuity ie-06 |x-uelocity y-uelocity energy OK Plot Re norm I Cancel Help I 图56调整残差收敛临界值 (9) 进一步迭代计算 Monilcirs manitaf-l 3S5.17M q 25.1300 - Area - Weighted Average 抻$1250 - 1 295.10 T 1 1 52 53 Iteration 图57 出口平均温度曲线 (10)保存 data 文件(201241102132.dat) 第6步 显示计算结果

30、 Contours Options Contours of Filled Velocity. Node Values r ir Global Range Auto Range Clip :o nanye Draw Profiles Draw Grid 20 丄 1 斗 J Levels Setup Surface Name 卩attern Match 图58 Velocity Magnitude p 卩上时了65 Surfaces default-interior A inle(_1 inlet_2 outlet wain 7 Surface Types =Jd axis A clip-sur

31、f ex haust-fan fan V Win (fn/s) Di占pl曲y I Compute I Close I Help | 绘制云图设置对话框 (1)利用不同颜色显示速度分布云图 3.24eOO 3.4le-0O 3.0?91-00 2 7304-00 2邸沪QCi 2 空e+E 2.219*00 2.046*00 1.ST6*00 1.70s*00 1騁計曲 1 see-oo 19尹00 1.03s*00 e .53601 B 81401 5 11&-01 2.S08*00 0 3.4101 1.70e-01 图59 速度分布云图 (2)显示速度矢量场 Vectors Options Node Vai les Global Range Auto Range I Ip it I? Rdr ije Auto