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ANSWER

張貼者:2011年4月19日 下午7:41未知的使用者   [ eddie liu 已於 2012年8月9日 上午9:35 更新 ]



ANSWER已經從一個簡單的數學模型流動與傳熱為一體的綜合計算流體力學軟件工具,用於分析範圍廣泛的問題。 它提供了耦合傳輸流體,熱和多種化學種複雜的三維幾何結構。 它能夠模擬的瞬態或穩態行為的層流或紊流可壓縮或不可壓縮流體中的化學反應,燃燒,液體噴劑,液滴燃燒,煙塵的形成和輻射。 它已經從一個簡單的計算機代碼和更少的幾個模塊選擇,一個軟件包和近1000模塊和靈活的設置選項,可以適應幾乎所有的用戶需求。



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開發商:ACRiCFD
原廠網址:http://acricfd.com/software/answer/default.htm
更新日期:2011/05/18
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一般特點:

ANSWER 是高度模塊化,提出了一種通用的接口給用戶。 它提供了一個平台,迅速 ​​與新的物理模型實驗,數值方法,矩陣解算器,等在其鮮明的特點是:

  • 獨特的用法 CFDStudio ,新的集成開發環境,大大縮短了答案:學習曲線
  • 一個強大而又簡單的英語一樣,自記載自由曲面™接口,允許用戶定義一個複雜的問題,一些簡單的命令。
  • 用戶可以定義新的字段變量與任意名稱的飛行 而無需編寫一行代碼 。
  • 任意數量的用戶可以解決新的運輸方程的用戶定義的屬性,來源和邊界條件 ,沒有一個單一行代碼 。
  • 用戶可以實現 任意多步動力學 無需編寫代碼。
  • 用戶可以實現任意複雜的功能,來源,邊界條件,場變量和流體性質和矩陣簡單的類似英語的命令。
  • ANSWER 提供各種各樣的物理子模型的 湍流 和 燃燒。
  • ANSWER 提供其他數值方法和矩陣解算器。
  • ANSWER 是高度模塊化的,可以很容易地集成外部求解,數值方法和問題的具體算法。











General Features:

ANSWER is highly modular and presents a versatile interface to the user. It provides a platform to quickly experiment with new physical models, numerical schemes, matrix solvers, etc. Among its distinctive features are:

  • The exclusive usage of CFDStudio, the new integrated development environment for ANSWER which significantly shortens the learning curve
  • A powerful yet simple English-like, self-documenting FREEFORM™ interface which allows user to define a complex problem with a few simple commands.
  • User can define new field variables with arbitrary names on the fly without writing a single line of code.
  • User can solve arbitrary number of new transport equations with user-defined properties, sources, and boundary conditions without a single line of code.
  • User can implement arbitrary multi-step kinetics without writing code.
  • User can implement arbitrary and complex functions for sources, boundary conditions, field variables and fluid and matrix properties with simple English-like commands.
  • ANSWER provides a wide variety of physical sub-models for turbulence and combustion.
  • ANSWER provides alternative numerical methods and matrix solvers.
  • ANSWER is highly modular and can easily integrate external solvers, numerical methods and problem specific algorithms.

Physics and Computational Features for the Detail-Oriented:

A wide variety of physical models are already implemented in ANSWER.

  • Transient or Steady state
  • Compressible or Incompressible fluid

Turbulence Models:

  • Near wall models:
    • Launder-Sharma
    • Chien
    • So-Sarkar
    • Yeang-Shih
  • Standard k-ε
  • k-ε with RNG
  • Non-linear Quadratic k-ε (Lumley-Shih)
  • Non-linear Cubic k-ε (Lumley-Shih)
  • Differential RSM(Craft-Ince-Launder)
  • LES (Implemented by UCLA/Northrop)
  • Wilcox's k-ω
  • Mentor's blended k-ε-ω
Combustion models:
  • 1,2,3 and 4-Step Hydrocarbon Model
  • 3 or 5-Step Univ. of Washington Hydrocarbon Model
  • User-defined multi-step multi-species reaction systems with/without turbulence limiting
  • Arbitrary 1st, 2nd or 3rd order Arrhenius Kinetics with or without EBU/turbulent limiting
  • Fast-Chemistry assumed PDF
  • Flamelet (Implemented by Prof. Candel for SMECMA)
  • Mass Transport with Unlimited number of Species
Sources:
  • Direct, Mass Injection, Solubility Limited, Radiation or Arrhenius Kinetics
  • Sources that are functions of surface area or volume
  • Functions of timespace or any dependent or user-defined variable
  • Any number and mix of sources for any variable
  • Boundary Conditions: Dirichlet, Neuman, Radiation and other derived types
Heat Transfer:
  • Conjugate heat transfer with embedded solids
  • Sub-models for SprayRadiationRegeneration and other physical phenomena
  • Built-in six-flux radiation model
  • Interface with heat ordinate radiation model
Geometry:
  • Structured or Unstructured Meshes
  • Arbitrary quadrilateral or Hexahedral control volumes
  • Specialized 2D and/or Cylindrical modes
  • Specialized 2D Cylindrical mode with a third swirl velocity component
  • Built-in geometry and meshing for geometrically and topologically simple problems

A brief History...

During the past 25 years, ANSWER has evolved from a simple mathematical model for flow and heat transfer into a comprehensive Computational Fluid Dynamics software tool for analysis of a wide range of problems. It provides for coupled transport of fluid, heat and multiple chemical species in complex three-dimensional geometry. It is able to simulate the transient or steady state behavior of laminar or turbulent flow in compressible or incompressible fluids with chemical reactions, combustion, liquid sprays, droplet burning, soot formation, and radiation. It has grown from a simple computer code with few modules and fewer options to a software package with almost 1000 modules and a versatile set of options that can accommodate almost any user requirements.

ANSWER has been used to analyze problems as diverse as low pressure film deposition, cooling of electronic components, automobile fluid dynamics, ventilation of tunnels, HVAC design optimization, analysis of process tanks, design of ramjets and aircraft engines, and missile launch tube simulations, lubrication of bearings, and performance of high Mach number missiles.

In the process, ANSWER has evolved with the user's needs. At every stage, the flexibility and generality of the software were maintained while options were added to address user requirements. As a result, today ANSWER provides a flexible format that is bound neither to a specific algorithm, nor to a particular methodology. Rather, it provides a framework that facilitates experimentation. The user can change numerical schemes, solution method, matrix inversion algorithms, or any of the physical or mathematical features.

Of all features of ANSWER, two deserve special mention: generality of applications over a diverse range of problems, and ease of use provided by the conversational FREEFORM command language. These have enabled ANSWER to emerge as a leading software in its field of application.

ANSWER™ is distinguished by the diversity of its users. It is being used by commercial, research and educational organizations in 6 countries. Among its users are Aerospatiale (France), Allison Gas Turbine, ASCI, S.A. (Spain), BAe-Sema (U.K.), C.N.I.M. (France), Department of Education (Mexico), GERPY (FRANCE), General Electric Company, James M. Montgomery, Lam Research Corporation, Marquardt Company, National Aeronautical and Space Administration, Renault (France), SNECMA (France), University of California, US Air Force, Watkins-Johnson, WS Atkins (UK), and a number of other commercial organizations. Over 100 publications and project reports on the benchmarking, verification and application of ANSWER™ are currently available.








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