Abstract
This chapter describes an approach to development of a computer program efficient enough to solve large scale fluid flow equations and yet flexible enough to deal with complex geometries. A computer program suitable for large eddy simulation (LES) of complex, industrial, applications and efficient enough on modern, distributed memory parallel computers has been developed. There are many issues, which require more attention in the future work, such as efficient parallel pre-conditioning, more flexible domain decomposition techniques, thorough examination of filers and implementation of more sophisticated models.LES with an unstructured solver is feasible on modern computational platforms and might find it's place in the arsenal of tools applied in industrial research of turbulent flows. Some performance statistics and LES results obtained on the Cray T3E parallel computer are also shown. LES is a well established technique for calculation of turbulent flows. It has been basically used for calculation of turbulent flows in simple canonical geometries. Single-block finite difference or spectral methods were usual methods of choice for LES.
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