Abstract
The literature model studied in this article describes bubble formation and growth in a highly viscous polymer liquid with support of a gaseous matter dispersed under pressure before foaming. The foam growth is induced by the application of vacuum and mass transport of volatile components dissolved in the polymer liquid. Based on this literature model, aeration processes are calculated for intermediate viscosity and low viscosity biological systems, as they are of interest for biomatter foams, in particular for food foams in industrial processes. At the end of this article, the numerical results are presented and discussed.
Highlights
Foams are of essential importance in nature and in a wide range of technical fields that deal with matter of biological origin such as biotechnology as well as food production and beverage industry
The literature model studied in this article describes bubble formation and growth in a highly viscous polymer liquid with support of a gaseous matter dispersed under pressure before foaming
Based on this literature model, aeration processes are calculated for intermediate viscosity and low viscosity biological systems, as they are of interest for biomatter foams, in particular for food foams in industrial processes
Summary
Foams are of essential importance in nature and in a wide range of technical fields that deal with matter of biological origin such as biotechnology as well as food production and beverage industry. There are several methods to incorporate bubbles within the biomatter structures: mixing, steam generation, gas injection, vacuum expansion and fermentation to name the most important procedures [1]. Recent experimental studies [2]-[7] have established relationships between process parameters and dispersion characteristics. There is still a lack of mathematically well-founded physical models that describe bubble formation and behavior in biomatter adequately. Nonnenmacher and Schütz [8] [9] [10] developed models to calculate foaming processes of polymer liquids in a static degassing system, which is supported by a gas dispersed into the polymer liquid under pressure before foaming.
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