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

Sandia National Laboratories

关键词: Foam-Fluid Dynamics.;    Foam-Thermodynamics.;    36 Materials Science;    Expansion;    Mathematical Models;   

DOI  :  10.2172/942055
RP-ID  :  SAND2008-6094
RP-ID  :  AC04-94AL85000
RP-ID  :  942055

美国|英语

来源: UNT Digital 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.