CFX-室内通风研究

Version1.33/23/2007©2007ANSYS,Inc.Allrightsreserved.CFX11.0ANSYS,Inc.ProprietaryInventory#002446W3-1室内通风研究RoomStudy教程3Version1.33/23/2007©2007ANSYS,Inc.Allrightsreserved.Inventory#002446W3-2CFX11.0ANSYS,Inc.ProprietaryWorkshopSupplement问题描述此教程将引导您分析办公室内计算机和工作人员对室内温度分布的影响。Version1.33/23/2007©2007ANSYS,Inc.Allrightsreserved.Inventory#002446W3-3CFX11.0ANSYS,Inc.ProprietaryWorkshopSupplement运行条件•流体类型：AirIdealGas•职员温度：37C•计算机显示器温度：30C•计算机通风孔：0.033kg/s@40C(percomputer)•天花板通风孔：0.225kg/s@21C(pervent)流动运行条件：Version1.33/23/2007©2007ANSYS,Inc.Allrightsreserved.Inventory#002446W3-4CFX11.0ANSYS,Inc.ProprietaryWorkshopSupplementWorkbench中启动CFX1.打开Workbench启动页2.点击AdvancedCFD•CFX-Pre将打开Version1.33/23/2007©2007ANSYS,Inc.Allrightsreserved.Inventory#002446W3-5CFX11.0ANSYS,Inc.ProprietaryWorkshopSupplementCFX-Pre：新的模拟3.CFX-Pre中，在File菜单下启动一个新的模拟4.模拟类型选择General模式Version1.33/23/2007©2007ANSYS,Inc.Allrightsreserved.Inventory#002446W3-6CFX11.0ANSYS,Inc.ProprietaryWorkshopSupplement导入网格1.目录树中右键点击Mesh选择ImportMesh2.选择文件RoomStudy.gtm，点击Open，导入网格第一步是导入已建立的网格Version1.33/23/2007©2007ANSYS,Inc.Allrightsreserved.Inventory#002446W3-7CFX11.0ANSYS,Inc.ProprietaryWorkshopSupplement创建域1.目录树中右键点击DefaultDomain选择Rename2.命名为Room3.目录树中双击Room以编辑域现在来创建一个计算域。Version1.33/23/2007©2007ANSYS,Inc.Allrightsreserved.Inventory#002446W3-8CFX11.0ANSYS,Inc.ProprietaryWorkshopSupplement创建域4.在GeneralOptions键下，设置FluidsLists为AirIdealGas5.设置BuoyancyOption为Buoyant。具体浮力模型设置如下：•GravityXDirn.=0[ms^-1]•GravityYDirn.=0[ms^-1]•GravityZDirn.=-9.81[ms^-1]•Buoy.Ref.Density=1.185[kgm^-3]考虑到由于密度差异所引起的自然对流问题，我们此次模拟启用浮力模型。浮力是密度扰动量的函数，密度扰动量为实际密度和参考密度的差值。由于密度变化非常小，在此使用参考密度可避免舍入误差。参考密度应当为计算域中的流体特征密度。Version1.33/23/2007©2007ANSYS,Inc.Allrightsreserved.Inventory#002446W3-9CFX11.0ANSYS,Inc.ProprietaryWorkshopSupplement创建域6.切换到FluidModels键7.改变HeatTransfer选项为ThermalEnergy8.改变Turbulence选项为ShearStressTransport9.切换到Initialisation键10.钩选DomainInitialisation复选框，再钩选InitialConditions复选框11.设置Temperature选项为AutomaticwithValue。输入温度Temperature＝21[C]Version1.33/23/2007©2007ANSYS,Inc.Allrightsreserved.Inventory#002446W3-10CFX11.0ANSYS,Inc.ProprietaryWorkshopSupplement创建域12.钩选TurbulenceEddyDissipation复选框13.点击Ok，提交设置对于大多数案例，由于求解器会自动计算出一个温度初始条件，所以不需要单独设置域的温度初始条件。然而，如果您输入的值相对于求解器自动计算的初始值更接近最终的解，那么您的求解会更快收敛。Version1.33/23/2007©2007ANSYS,Inc.Allrightsreserved.Inventory#002446W3-11CFX11.0ANSYS,Inc.ProprietaryWorkshopSupplement创建边界条件经过前面两教程的练习，现在您应当已熟悉如何创建边界条件。此模拟中需要创建11个边界条件。我们提供了创建每一个边界条件的设置细节。如果您对创建边界条件还不是很熟悉，请参考前面的教程。1.职员边界条件（WorkersBoundaryCondition）–名称：Workers–边界类型：Wall–位置：humans–传热选项（HeatTransferOption）：Temperature–固定温度（FixedTemperature）：37[C]Version1.33/23/2007©2007ANSYS,Inc.Allrightsreserved.Inventory#002446W3-12CFX11.0ANSYS,Inc.ProprietaryWorkshopSupplement创建边界条件2.通风孔1边界条件（Vent1BoundaryCondition）–名称：Vent1–边界类型：Inlet–位置：vent1–质量与动量选项（MassandMomentumOption）：MassFlowRate–质量流率（MassFlowRate）：0.225[kg/s]–传热选项（HeatTransferOption）：StaticTemperature–静温（StaticTemperature）：21[C]3.通风孔2边界条件（Vent2BoundaryCondition）–名称：Vent2–边界类型：Inlet–位置：vent2–质量与动量选项（MassandMomentumOption）：MassFlowRate–质量流率（MassFlowRate）：0.225[kg/s]–传热选项（HeatTransferOption）：StaticTemperature–静温（StaticTemperature）：21[C]Version1.33/23/2007©2007ANSYS,Inc.Allrightsreserved.Inventory#002446W3-13CFX11.0ANSYS,Inc.ProprietaryWorkshopSupplement创建边界条件4.门（DoorBoundaryCondition）–Name:Door–BoundaryType:Opening–Location:door–MassandMomentumOption:OpeningPres.andDirn–RelativePressure:0[Pa]–HeatTransferOption:OpeningTemperature–OpeningTemperature:21[C]5.显示器（MonitorsBoundaryCondition）–Name:Monitors–BoundaryType:Wall–Location:monitors–HeatTransferOption:Temperature–FixedTemperature:30[C]Version1.33/23/2007©2007ANSYS,Inc.Allrightsreserved.Inventory#002446W3-14CFX11.0ANSYS,Inc.ProprietaryWorkshopSupplement创建边界条件6.计算机1排气孔（Computer1VentBoundaryCondition）–Name:Computer1Vent–BoundaryType:Inlet–Location:computer1Out–MassandMomentumOption:MassFlowRate–MassFlowRate:0.033[kg/s]–HeatTransferOption:StaticTemperature–StaticTemperature:40[C]7.计算机2排气孔（Computer2VentBoundaryCondition）–Name:Computer2Vent–BoundaryType:Inlet–Location:computer2Out–MassandMomentumOption:MassFlowRate–MassFlowRate:0.033[kg/s]–HeatTransferOption:StaticTemperature–StaticTemperature:40[C]Version1.33/23/2007©2007ANSYS,Inc.Allrightsreserved.Inventory#002446W3-15CFX11.0ANSYS,Inc.ProprietaryWorkshopSupplement创建边界条件8.计算机3排气孔（Computer3VentBoundaryCondition）–Name:Computer3Vent–BoundaryType:Inlet–Location:computer3Out–MassandMomentumOption:MassFlowRate–MassFlowRate:0.033[kg/s]–HeatTransferOption:StaticTemperature–StaticTemperature:40[C]9.计算机1进气孔（Computer1IntakeBoundaryCondition）–Name:Computer1Intake–BoundaryType:Outlet–Location:computer1In–MassandMomentumOption:MassFlowRate–MassFlowRate:0.033[kg/s]Version1.33/23/2007©2007ANSYS,Inc.Allrightsreserved.Inventory#002446W3-16CFX11.0ANSYS,Inc.ProprietaryWorkshopSupplement创建边界条件10.计算机2进气孔（Computer2IntakeBoundaryCondition）–Name:Computer2Intake–BoundaryType:Outlet–Location:computer2In–MassandMomentumOption:MassFlowRate–MassFlowRate:0.033[kg/s]11.计算机3进气孔（Computer3IntakeBoundaryC