Foam Process Models.

Rao, R. R. ; Mondy, L. L. ; Moffat, H. K. ; Noble, D. R. ; Notz, P. K.

Technical Information Center Oak Ridge Tennessee

关键词: Computational models;    Flow visualization;    Expansion;    Mathematical models;    Finite element methods;   

RP-ID  :  DE2008942055

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

In this report, we summarize our work on developing a production level foam processing computational model suitable for predicting the self-expansion of foam in complex geometries. The model is based on a finite element representation of the equations of motion, with the movement of the free surface represented using the level set method, and has been implemented in SIERRA/ARIA. An empirically based time- and temperature-dependent density model is used to encapsulate the complex physics of foam nucleation and growth in a numerically tractable model. The change in density with time is at the heart of the foam self-expansion as it creates the motion of the foam. This continuum-level model uses an homogenized description of foam, which does not include the gas explicitly. Results from the model are compared to temperature-instrumented flow visualization experiments giving the location of the foam front as a function of time for our EFAR model system.