Use of the 'trial and error' principle is still valid in some industries. However, the use of advanced computerised technology to aid in understanding and to minimise costs for product development and design of the plant is a much smarter method. Computational Fluid Dynamics (CFD) awakens ideas, CFD reveals, and CFD prevents mistakes - all at a much lower cost than 'trial and error.' Modern CFD programmes permit the simulation and analysis of flows on the computer. The computer-supported analysis enables examination of the dynamics of flowing media and provides a computer model which represents the examined conditions of an installation. The special strength of CFD simulations lies in the fact that 'trial and error' experiments, which are practicable in reality only with great effort, can be limited by CFD to the most likely solutions of the problem and with a minimum of effort.
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