Experimental and numerical investigations of natural convection phenomena in a fermentation tank
Abstract
In the context of investigations of real multiphase flows, the university has its own 350 litre fermentation tank with comprehensive acoustic flow and temperature measurement technology for the systematically investigation, of the influence of the fermentation activity, distribution of yeast and occurring convection phenomena. Due to the many problems with the optical (e.g. PIV) and acoustic (e.g. UDV) measurement in a real fermenting fluid the numerical simulation was already used in earlier publications. To validate the numerical models, extensive experimental investigations were carried out which show that the flow in the fermenter is caused only by the reaction products of the yeast and the cooling panels and controls the yeast distribution. In this paper, both the numerical (CFD) and the experimental investigations serve as a starting point to influence the yeast distribution. The described convection flow can only temporarily guarantee the uniform distribution of the yeast in the fermenter until the sedimentation of the yeast at the tank bottom (bottom-fermenting yeast) finally begins.
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Author Biographies
Daniel Klembt is a mechanical engineer and is currently completing his doctoral degree (Dr.-Ing.) on real biological multiphase flows at the University Erlangen-Nürnberg. Since 2017 he has been a research assistant at the Department of Fluid Mechanics and Apparatus Engineering at the University of Applied Sciences Stralsund. His scientific interests are in the fields of acoustic velocity profile measurement, optical measurement techniques, numerical simulation and generally the investigation of real multiphase flows. He participated in 5 international and 3 national conferences and presented the results of his work, published more than 10 scientific papers in international and national journals, book chapters and conference reports.
Heiko Meironke received his doctoral degree (Dr.-Ing.) at the University of Rostock in the Faculty of Mechanical Engineering and Shipbuilding Technology, specialising in applied mechanics, and is currently professor at the University of Applied Sciences Stralsund. Since 2009 he is leader of the Department of Fluid Mechanics and Apparatus Engineering at the University of Applied Sciences Stralsund. His scientific interests are the investigation of general fluid mechanics problems, in particular the experimental and numerical investigation of multiphase flows in fermenting fluids. He presented these topics regularly at several national and international conferences and published the results in several conference proceedings and journals.
Copyright (c) 2019 Daniel Klembt, Heiko Meironke
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