01-05-2010, 11:58 PM
INTRODUCTION
The abbreviation CFD stands for computational fluid dynamics. It represents a vast area of numerical analysis in the field of fluidâ„¢s flow phenomena. Headway in the field of CFD simulations is strongly dependent on the development of computer-related technologies and on the advancement of our understanding and solving ordinary and partial differential equations (ODE and PDE). However CFD is much more than just computer and numerical science. Since direct numerical solving of complex flows in real-like conditions requires an overwhelming amount of computational power success in solving such problems is very much dependent on the physical models applied. These can only be derived by having a comprehensive understanding of physical phenomena that are dominant in certain conditions. [1], [8] Why turbulence? Whenever turbulence is present in a certain flow it appears to be the dominant over all other flow phenomena. That is why successful modeling of turbulence greatly increases the quality of numerical simulations. All analytical and semi-analytical solutions to simple flow cases were already known by the end of 1940s. On the other hand there are still many open questions on modeling turbulence and properties of turbulence it-self. No universal turbulence model exists yet. Further more the price tag for our ignorance is immense. That makes the area of CFD modeling also extremely economically attractive.
Presented By;
Jurij SODJA
Mentor: prof. Rudolf PODGORNIK
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http://www-f1.ijs.si/~rudi/sola/Turbulen...in-CFD.pdf
