Development of a Model for the Wall Film Formed by Impinging Spray Based on a Fully Explicit Integration Method

2005-24-087

09/11/2005

Event
7th International Conference on Engines for Automobile
Authors Abstract
Content
A wall film model has been implemented in a customized version of KIVA-3 code developed at University of Bologna. Under the hypothesis of `thin laminar flow' the model simulates the dynamics of a liquid wall film generated by impinging sprays. Particular care has been taken in numerical implementation of the model.
The major phenomena taken into account in the present model are: wall film formation by impinging spray; body forces, such as gravity or acceleration of the wall; shear stress at the interface with the gas and no slip condition on the wall; momentum contribution and dynamic pressure generated by the tangential and normal component of the impinging drops; film evaporation by heat exchange with wall and surrounding gas. The model doesn't consider the effect of the wavy film motion and suppose that all the impinging droplets adhere to the film. The governing equations have been integrated in space by using a finite volume approach with a first order upwind differencing scheme and they have been integrated in time with a fully explicit method.
The model is validated using two different test cases reproducing PFI gasoline and DI diesel engine wall film conditions.
Meta TagsDetails
DOI
https://doi.org/10.4271/2005-24-087
Pages
12
Citation
Cazzoli, G., and Forte, C., "Development of a Model for the Wall Film Formed by Impinging Spray Based on a Fully Explicit Integration Method," SAE Technical Paper 2005-24-087, 2005, https://doi.org/10.4271/2005-24-087.
Additional Details
Publisher
Published
Sep 11, 2005
Product Code
2005-24-087
Content Type
Technical Paper
Language
English