It is opposite to an experimental investigation by a material model or prototype of the system, such as an aircraft or car model in a wind tunnel.
The role of CFD in this contemporary technological world is crucial. It assists towards the path of global world of Computer Assisted Engineering or CAE that refers to ensemble of simulation tools that support the work of engineer between the initial design phase and the final definition of manufacturing process. The industrial production process uses various software tools for computerization of whole production cycle. Among those tools, the most important are Computer-Assisted Design (CAD), Computer-Assisted Engineering (CAE), and Computer- Assisted Manufacturing (CAM) software. The virtual prototyping environment is made by these CAD/CAE/CAM software systems. (shown in the following figure). In the chart, we can see the different components of a computer-oriented environment used in industry to create or modify the properties of a product. This product also can be a single component such as a cooling jacket in a car engine. In all steps, the related software tools are used in similar ways. Let us see the phases of virtual protype environment for analysis of internal flow of CFD analysis.
1) Definition Phase: The definition phase is the fi...
This phase includes creating and defining the geometry of the system in details. It is the day to day routine responsibility of the designers to build the geometrical model on the computer screen. For CFD simulation task, the CAD definition of the geometry is the unavoidable input.
2) The Simulation & Analysis Phase: This is the next phase which uses the software tools to calculate the physical behavior of the system on the computer. It is known as virtual prototyping which is based on CAE software with several sub branches related to the different physical effects that have to be modeled and simulated during the design process. Among these, the most important are:
i)Computational solid mechanics (CSM) :- This software evaluates the mechanical stresses, deformations, vibrations of the solid part of the system including fatigue and life estimation. It also has modules for conducting thermal analysis of the materials including heat conduction, thermal stresses, and thermal dilation effects.
ii) Computational Fluid Dynamics (CFD):- It refers to the software tools that analyzes the fluid flow including the thermal heat transfer and heat conduction effects in the flow as well as the solid boundaries of the flow domain. For example, CFD software is used in an aircraft engine to analyze the flow in the multistage combination of rotating and fixed blade rows of the compressor and turbine. Then it predicts their performance, analyzes the combustor behavior and the thermal parts to optimize the cooling passages, cavities, labyrinths, seals and similar sub - components. Other simulation area indicates the specialized physical phenomena such as Computational Aero- Acoustics (CAA) and