Foam process models.

Moffat, Harry K. ; Noble, David R. ; Baer, Thomas A. (Procter & Gamble Co., West Chester, OH) ; Adolf, Douglas Brian ; Rao, Rekha Ranjana ; Mondy, Lisa Ann

关键词: FOAMS;    EXPANSION;    MATHEMATICAL MODELS;    FINITE ELEMENT METHOD;    EQUATIONS OF MOTION;    FLOW VISUALIZATION;    DENSITY Foam-Fluid dynamics.;    Foam-Thermodynamics.;   

DOI  :  10.2172/942055
RP-ID  :  SAND2008-6094
PID  :  OSTI ID: 942055
Others  :  TRN: US200902%%5

学科分类：材料科学（综合）

美国|英语

来源: SciTech Connect

【 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.