Solver Control Settings for the behavior of the CFX-5 solver Maximum number of timesteps Timestep selection Transient timestep control for results output Convergence criteria Order of differencing scheme Advanced Options

CFX-5 mesh generator provides: Automatic mesh generation Unstructured triangular surface mesh generation Tetrahedral/prismatic volume mesh generation There are three modes of volume meshing in CFX-5

Computational Fluid Dynamics (CFD) Simulation of fluid flow, heat transfer and mass transfer processes CFD involves the numerical solution of the governing equations Mass continuity

Main Objective: Build a viable domain (B-rep solids, cutout solids, simple solids) B-rep (Boundary Representation) solids are composed of simple and/or trimmed surfaces Simple (Parametric) solids have cubic topology Multiple solids must connect at whole faces Surface and face congruency and parameterization must be kept in mind or the mesh quality will suffer

Domains represent 3D regions where governing equations are solved Domains can be comprised of more than one solid joined together Domains can also contain internal 3D regions Cutouts- solid obstacles to flow Sub -domains- Fluid sub-domains: volumetric sources/sinks of mass. heat

Create a solid which defines the region of interest. Define the fluid domain in terms of flow region, physical models, and fluid properties. Apply boundary conditions to fluid domain surfaces. Specify an initial guess/condition for the simulation

CEL is an interpreted, declarative language which enables users to enhance simulations without recourse to external fortran routines. It uses mathematical expressions for physical quantities as opposed to using fixed values. Access to CFX-5 internal variables (including solution variables)

Boundary conditions are required to set on all external domain boundaries Initial values/guess are required to set for all calculations Boundary conditions and initial values/guess can be either constants or expressions

(1)熟悉电子表格 Excel的工作界面,掌握 Excel中建立表格以及输入数据的基本方法; (2)学会 Excel中的数据进行一般计算(包括利用函数)

9.1数据的导入和导出 9.2使用DTS设计器