Gas phase behaviour in environment of fermentation processes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F25%3A00637074" target="_blank" >RIV/67985858:_____/25:00637074 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22340/25:43933541

Výsledek na webu

<a href="https://hdl.handle.net/11104/0368039" target="_blank" >https://hdl.handle.net/11104/0368039</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cherd.2025.05.031" target="_blank" >10.1016/j.cherd.2025.05.031</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Gas phase behaviour in environment of fermentation processes

Popis výsledku v původním jazyce

The residence time distribution of the gas phase has been measured in a stirred tank reactor with three impellers mounted on a common shaft. The gas Peclet number is studied over a wide range of operational (impeller speed, gas flow rate) and geometrical (impeller size, type) conditions. The effects of impeller geometry and fluid properties are clearly described, indicating a critical influence of bubble size distribution on gas macromixing and recirculation. Hydrofoil down-pumping impellers were found to produce the best gas mixing compared to radial or up-pumping axial impellers exhibiting the lowest gas Peclet number. Viscous and non-coalescent batches exhibit a bubble size distribution with a significant proportion of small bubbles contributing to more intense gas mixing and lower Peclet numbers compared to distilled water. Due to the wide range of operating conditions used, the quantities found can be used not only in industrial applications for optimisation or design of stirred tank reactors, but also for more advanced modelling and verification of CFD simulations.

Název v anglickém jazyce

Gas phase behaviour in environment of fermentation processes

Popis výsledku anglicky

The residence time distribution of the gas phase has been measured in a stirred tank reactor with three impellers mounted on a common shaft. The gas Peclet number is studied over a wide range of operational (impeller speed, gas flow rate) and geometrical (impeller size, type) conditions. The effects of impeller geometry and fluid properties are clearly described, indicating a critical influence of bubble size distribution on gas macromixing and recirculation. Hydrofoil down-pumping impellers were found to produce the best gas mixing compared to radial or up-pumping axial impellers exhibiting the lowest gas Peclet number. Viscous and non-coalescent batches exhibit a bubble size distribution with a significant proportion of small bubbles contributing to more intense gas mixing and lower Peclet numbers compared to distilled water. Due to the wide range of operating conditions used, the quantities found can be used not only in industrial applications for optimisation or design of stirred tank reactors, but also for more advanced modelling and verification of CFD simulations.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20402 - Chemical process engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Chemical Engineering Research and Design

ISSN

0263-8762

e-ISSN

1744-3563

Svazek periodika

219

Číslo periodika v rámci svazku

JUL 2025

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

43-51

Kód UT WoS článku

001508995200001

EID výsledku v databázi Scopus

2-s2.0-105007148971