3D simulation of polyurethane foam injection and reacting mold flow in a complex geometry
- 151 Downloads
The aim of the present work is to develop a flow model which can be used to determine the paths of the polyurethane foam in the mold filling process of a refrigerator cabinet so that improvements in the distribution and the size of the venting holes can be achieved without the expensive prototyping and experiments. For this purpose, the multi-component, two-phase chemically reacting flow is described by Navier Stokes and 12 scalar transport equations. The air and the multi-component foam zones are separated by an interface, which moves only with advection since the mass diffusion of species are set zero in the air zone. The inverse density, viscosity and other diffusion coefficients are calculated by a mass fraction weighted average of the corresponding temperature-dependent values of all species. Simulations are performed in a real refrigerator geometry, are able to reveal the problematical zones where air bubbles and voids trapped in the solidified foam are expected to occur. Furthermore, the approach proves itself as a reliable design tool to use in deciding the locations of air vents and sizing the channel dimensions.
This study has been funded by the Turkish Ministry of Industry (SANTEZ 01213.STZ-2012-1). The partial support by Arcelik Inc. is also acknowledged.
- 1.Klempner D, Sendijarevic V (2004) Handbook of polymeric foams and foam technology, 2nd edn. Hanser Publications, CincinnattiGoogle Scholar
- 2.Federation of European Rigid Polyurethane Foam Associations. Report No: 1, Thermal insulation materials made of rigid polyurethane foam (PUR/PIR): Properties – Manufacture, October 2006Google Scholar
- 6.Ozdemir IB, Akar F (2017) Effects of composition and temperature of initial mixture on the formation and properties of polyurethane foam. Adv Polym TechnolGoogle Scholar
- 7.Goods SH, Neuschwanger CL, Henderson C, Skala DM (1997) Mechanical properties and energy absorption characteristics of a polyurethane foam. Technical Paper SAND97–8490Google Scholar
- 8.Maier U, Wirtz H-G, Fietz J, Frahm A, Rüb T (2005) Polyurethane Processing Systems, Bayer Material Science, (24)19:1–12Google Scholar
- 9.Ashida K (2007) Polyurethane and related foams – chemistry and technology. Taylor and Francis, AbingdonGoogle Scholar
- 11.Khazabi M (2015) Investigation of biopolyol spray foam insulation modified with natural fibers. PhD Thesis, Faculty of Forestry, University of TorontoGoogle Scholar
- 27.Kee RJ, Coltrin ME, Glarborg P (2005) Chemically reacting flow: theory and practice. John Wiley and Sons, HobokenGoogle Scholar
- 28.Warnatz J (2002) HOMREA user guide, Steinbeis-Transferzentrum, Simulation Reaktiver Strömungen, HeidelbergGoogle Scholar
- 31.ANSYS FLUENT, Release 6.3, Analysis guide, ANSYS, Inc.Google Scholar