The heat and mass transfer of a fermenting multiphase flow using acoustic measurement technology and numerical methods
Klembt D, Meironke H, Delgado A (2021)
Publication Type: Journal article
Publication year: 2021
Journal
Book Volume: 199
Article Number: 117552
DOI: 10.1016/j.applthermaleng.2021.117552
Abstract
This experimental research was performed for the measurement-based detection and numerical simulation of a biological multiphase flow in a fermentation tank. The difficulties of an investigation are the many complex interactions between the different three phases (yeast as solid, carbon dioxide as gas, wort as liquid). One of the main difficulties is, that the natural convection processes are superimposed by rising gas bubbles in a high turbid fluid. Due to the various problems in optical measurement (e.g. PIV, LDA) the measurement is realised with acoustic sensors, so-called transducers. For a detailed understanding of the results of the acoustic measurement and the associated interpretation of the heat and mass transfer, high demands are on the acoustic measurement technology and the subsequent evaluation due to the real multiphase flow. These requirements are further complicated by the combination of several transducers and the targeted conversion of the measurement technology from a 1D acoustic measurement method to a 2D flow field measurement system. Furthermore, it is shown how problems of the acoustic measurement technology, caused by the multiphase flow, can be solved. The systematic investigation and improvement of the measurement technique allows the direct correlation of the measured temperature fields with the flow fields of the acoustic measurement technique. This combination of temperature and velocity allows the heat transfer of the yeast from the inside to the liquid and the cooling from the outside to the liquid to be analysed and investigated in detail. Finally, the influence of the different phases (yeast as solid, carbon dioxide as gas, wort as liquid) is evaluated, visualised and the complex interactions of the phases on heat and mass transfer are explained. In addition to acoustic measurements in the fermentation fluid, numerical simulations are used to provide additional insights into the processes in a fermenter.
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Germany (DE)How to cite
APA:
Klembt, D., Meironke, H., & Delgado, A. (2021). The heat and mass transfer of a fermenting multiphase flow using acoustic measurement technology and numerical methods. Applied Thermal Engineering, 199. https://doi.org/10.1016/j.applthermaleng.2021.117552
MLA:
Klembt, Daniel, Heiko Meironke, and Antonio Delgado. "The heat and mass transfer of a fermenting multiphase flow using acoustic measurement technology and numerical methods." Applied Thermal Engineering 199 (2021).
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