Steps in Model Creation - build wireframe using points, curves, surfaces and solids. - define constraints for solids with area mismatch. - define boundary conditions (inlet, outlet, walls). - mesh all surfaces

The initial tolerance is important for geometry construction and grid construction. The preferred method to set the tolerance is to work from the Preferences pull down menu and select Global

build/import geometry create multi-block structures create patches mesh the geometry create a CFX-4 geo file

The geometry is a set of hexahedral solids which have a logical representation. Each block in the geometry is called a ‘solid’. Each solid in the geometry can represent a fluid, porous or solid region

Simplify the problem - Simplify geometry > Ignore features that do not affect the flow > Use as many blocks as possible to set the geometry > Make blocks meet at complete faces

Introductory Training (Dec 1999) Post-Processing Visualizer - graphic objects - cameras. Regions. Scalar fields. ACL Parameters

AEATECHNOLOGY ENGINEERING SOFTWARE Performing a CFD Analysis Define the problem Geometry Domain in which the governing equations will be solved and solutions obtained

Obtain hands on experience with CFX-4 Familiarity with the software and documentation. Pre-Processing - Concept of geometry and multi-block- creation Boundary condition specification

一、边界条件 二、物理现象 三、流体属性，诸如密度、粘度等

9.1 防火墙的基础知识 9.2 防火墙的基本技术原理及其配置 9.3 防火墙的主要性能指标