Multidimensional Modeling of Advanced Diesel Combustion System by Parallel Chemistry Istituto Motori - CNR

Format:

Conference/Event

Author/Creator:

Belardini, P., author.

Conference Name:

SAE 2005 World Congress & Exhibition (2005-04-11 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2005

Summary:

In the present paper the combustion process in a modern second generation Common Rail Diesel engine for light duty application is experimentally and numerically investigated. An improved version of the KIVA3V-Release 2 code was used for the simulations.To model the combustion process, a detailed kinetic scheme involving 57 species and 290 equations, based on the n-heptane combustion, was used, interfacing the KIVA3V code with the CHEMKIN-II chemistry package. The full set of equations is concurrently solved in each computational cell by different solvers with the final aim of obtaining a locally adaptative code: local choices are undertaken in terms of time steps as well as in terms of the employed solvers. To reduce computational time, the code was parallelized: this parallelization is mainly focused on the chemical subroutines, considering that they are responsible for more than the 95% of the computing. Due to the spatial in-homogeneous characteristics of diesel combustion, the grid partitioning is a key point for efficient computation. Therefore, different grid partitioning criteria were used and analyzed in terms of "divide and conquer" advantages and load balancing issues. The performance analysis suggests that a random partitioning criterion is useful to smooth the grid in-homogeneities over the processes

Notes:

Vendor supplied data

Publisher Number:

2005-01-0201

Access Restriction:

Restricted for use by site license