Community Research and Development Information Service - CORDIS

Methodology for imposing boundary conditions in engine CFD simulations

The objective of CSIC under this contract was to develop a methodology to impose turbulent boundary conditions in the inlet of an engine simulation, as well as the necessary tools to implement the method in one of the large eddy simulation codes used by the partners (AVBP).

The chosen method consists in generating an artificial homogeneous isotropic turbulent field and modulate the amplitude of fluctuations to adapt to the desired average inlet conditions as needed at run time. A non-reflecting boundary condition method is also used to avoid numerical or physical waves to be reflected in the inlet of the domain.

This methodology represents a significant reduction in computational expenses (both in memory and time) as compared to the methods in which a large computational domain or an additional concurrent simulation is needed to include transition to turbulence. It is not limited to combustion systems, but can be of interest to the wide computational fluid dynamics community.

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Consejo Superior de Investigaciones Científicas
LITEC María de Luna, 10
50018 Zaragoza
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