Direct Numerical Simulation of Fuel Droplet Collision in Diesel Engines Università di Roma "Tor Vergata"

Format:

Conference/Event

Author/Creator:

Rotondi, Rotondi, author.

Contributor:

Bella, Gino

Conference Name:

7th International Conference on Engines for Automobile (2005-09-11 : Naples, Italy)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Naples, ITALY Consiglio Nazionale delle Ricerche 2005

Summary:

Fuel droplet collision plays an important role in the mixtureformation mechanism in Internal Combustion Engines (ICE), sincethis process significantly modifies the droplet sizes andsubsequent spray development and combustion. But one of the majorproblems in the simulation of the droplet collision process is thatthe criteria employed to determine outcomes of collisions have notbeen assessed for accuracy under diesel spray conditions.The numerical simulation of multiphase flows is a challengingsubject due to the difficulty in the tracking of interfaces, themass conservation of each fluid and the treatment of large densityratio and surface tension.In this paper a fully 3D two-phase Lattice-Boltzmann Method(LBM) is used to perform Direct Numerical Simulation (DNS) ofdroplet collision at diesel-like conditions. The LBM has greatadvantages over conventional methods (e.g., VOF) since it does nottrack interfaces, but can maintain sharp interfaces without anyartificial treatment, and is accurate for the mass conservation ofeach component. The goal of the paper is to demonstrate that thenumerical tool developed can provide a detailed picture of themechanisms that govern the phenomenon, giving information whereexperimental investigations are difficult. This approach cantherefore assist in the development of accurate collision modelsfor practical CFD applications

Notes:

Vendor supplied data

Publisher Number:

2005-24-056

Access Restriction:

Restricted for use by site license