CFD (Computational Fluid Dynamics) One of the fundamental equation in fluid mechanics is Navier-Stokes equation. This equation is generally unsteady and nonlinear. For a very simple geometry and boundary conditions, one can get a simple solution of this equation. However, its exact solution for the general situation is not solved yet (analytically). Moreover, some mathematicians and physicist claim that this equation has non-unique solutions.
For the engineering purposes and as a supportive method, discretized Navier-Stokes equation has been solved with the help of modern computers. There are many advantages of using computers, of course. Since everything is done in the 'virtual' space, one can adjust parameters easily. Most of results are stored in digitized form, so that one can do post-processing according to the purpose. (statistics, animations, snapshots, slow-motions etc.) Moreover, one can easily simulate some virtual states to expand the knowledge of fluid motions, which could have been very hard to implement in the real experiments. Although, CFD cannot solve all the flow problems due to the limitation of computer resources. Nevertheless, CFD has provided priceless insights and practical information. Some people have shown some 'state-of-the-art' plots of fluid motions to expand our mind into the beauty of fluid-physics. Here are some examples : | |
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