Experimental and numerical investigations of natural convection phenomena in a fermentation tank

• Autorzy: Klembt Daniel , Meironke Heiko

Identyfikatory

DOI

10.30464/jmee.2019.3.3.235

• Języki publikacji: EN

Abstrakty

EN

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. The aim of the investigation is to influence the convection flow in certain zones by targeted cooling or heating of the jackets in such a way that a uniform spatial distribution of the yeast over the entire fermentation process is ensured and thus optimal conditions for its metabolic processes are given. Finally, the numerical simulation is validated with the experimental data.

Słowa kluczowe

EN

ultrasonic doppler velocimetry; numerical simulation; natural convection flow

PL

welocymetria dopplerowska; symulacja numeryczna; przepływ konwekcyjny

• Wydawca: Wydawnictwo Uczelniane Politechniki Koszalińskiej
• Czasopismo: Journal of Mechanical and Energy Engineering
• Rocznik: 2019
• Tom: Vol. 3, No 3
• Strony: 235--244
• Opis fizyczny: Bibliogr. 28 poz., rys., tab., wykr.

Twórcy

autor

Klembt Daniel

• Faculty of Mechanical Engineering, Department of Fluid Mechanics and Apparatus Engineering, University of Applied Science Stralsund, Zur Schwedenschanze 15, 18435, Stralsund, Germany

autor

Meironke Heiko

• Faculty of Mechanical Engineering, Department of Fluid Mechanics and Apparatus Engineering, University of Applied Science Stralsund, Zur Schwedenschanze 15, 18435, Stralsund, Germany

Bibliografia

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• 2. Klembt D., Meironke H. (2019). Numerical approaches for the yeast distribution in a fermentation tank. PAMM Proceeding Applied Mathematics Mechanics, e201900116. doi: 10.1002/pamm.201900116, Vienna.
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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).