Finite element modeling of the lost foam casting process tackling back‐pressure effects
International Journal of Numerical Methods for Heat & Fluid Flow
ISSN: 0961-5539
Article publication date: 1 July 2006
Abstract
Purpose
To develop a numerical methodology to simulate the lost foam casting (LFC), including the gas back‐pressure effects.
Design/methodology/approach
Back‐pressure effects are due to the interactions of many physical processes. The strategy proposed herein tries to model all these processes within a simple formula. The main characteristic of the model consists of assuming that the back‐pressure is a known function of the external parameters (coating, temperature, gravity, etc.) that affects directly the heat transfer coefficient from the metal to the foam. The general framework of the simulation is a finite element model based on an arbitrary Lagrangian Eulerian (ALE) approach and the use of level set function to capture the metal front advance.
Findings
After experimental tunings, the model provides a way to include the back‐pressure effects in a simple way.
Research limitations/implications
The method is not completely predictive in the sense that a priori tuning is necessary to calibrate the model.
Practical implications
Provides more realistic results than classical models.
Originality/value
The paper proposes a theoretical framework of a finite element method for the simulation of LFC process. The method uses an ALE method on a fixed mesh and a level‐set function to capture metal front advance. It proposes an original formula for the heat transfer coefficient that enables one to include back‐pressure effects.
Keywords
Citation
Houzeaux, G. and Codina, R. (2006), "Finite element modeling of the lost foam casting process tackling back‐pressure effects", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 16 No. 5, pp. 573-589. https://doi.org/10.1108/09615530610669111
Publisher
:Emerald Group Publishing Limited
Copyright © 2006, Emerald Group Publishing Limited