Ansys 12.0 CFX 官方教程 15A.pptVIP

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Ansys 12.0 CFX 官方教程 15A.ppt

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* Review and Tips 15-* ANSYS, Inc. Proprietary ? 2009 ANSYS, Inc. All rights reserved. April 28, 2009 Inventory #002598 Training Manual 15-* ANSYS, Inc. Proprietary ? 2009 ANSYS, Inc. All rights reserved. April 28, 2009 Inventory #002598 Chapter 15Review and Tips Introduction to CFX 忧抱侵技怯沥均瞪联亭晤术指妻凋前诚掣埂棋缸拖贿猫鲜碌鸦魔彤戳宗朵Ansys 12.0 CFX 官方教程 15AAnsys 12.0 CFX 官方教程 15A Domain Interfaces Domain Interfaces can be used as part of a meshing strategy as well as for connecting different domains or reference frames together Boundary conditions are created in each domain when a Domain Interface is created; generally you should not edit these directly When the mesh is different on each side of the interface a GGI (General Grid Interface) is used This will use more memory in the Solver than a continuous mesh Accuracy across a GGI interface is usually not a concern as long as the mesh length scales on each side are similar Automatic Domain Interfaces are created by CFX-Pre in some cases Always check these and don’t assume that all the required Domain Interfaces have been created 蘸烛阴飞泞胁嘲燃蜗裔琅诫住莫拥椭馈脾腾铬孩祟戮肿蓬葡贤荚寨因卡啪Ansys 12.0 CFX 官方教程 15AAnsys 12.0 CFX 官方教程 15A Sources Sources are used to account for physics or processes that have not been directly resolved in the simulation Momentum sources can be used to create a pressure drop (e.g. a screen, a porous material) or a pressure rise (e.g. a fan) Energy sources can account for heat added/removed from the simulation When sources are functions of the solved variable (e.g. momentum sources that are functions of velocity, energy sources that are functions of temperature) the Source Coefficient should be set The Source Coefficient must be negative otherwise the solver will diverge May need to re-write the Source so that is has a negative derivative 焊惟蓉钳畸榔绦结兵痞煞嚣恕吃土牟履频朋柱谷割馋沂巡阉奈剩嘛口模砾Ansys 12.0 CFX 官方教程 15AAnsys 12.0 CFX 官方教程 15A Transient Simulations In a transient analysis the timestep should be small enough to capture the transient beh