National Repository of Grey Literature 14 records found  1 - 10next  jump to record: Search took 0.00 seconds. 
Volumetric Mass Transfer Coefficient and Gas Holdup in Solution of Electrolyte in Different Flow Regimes in Bubble Column
Fialová, Marie ; Orvalho, Sandra ; Zedníková, Mária ; Drahoš, Jiří ; Růžička, Marek
Volumetric mass transfer coefficient, kLaL and gas holdup, εG were measured in distilled water and in solutions of Na2SO4 (both coalescent solutions and solutions with suppressed coalescence), under homogeneous and heterogeneous bubbling conditions in bubble column. Dynamic pressure step method was used for kLaL measurement. The gas holdup, εG was measured by the bed expansion method.
Effect of Coalescence on Gas Holdup and Volumetric Mass Transfer Coefficient in Bubble Column
Fialová, Marie ; Orvalho, Sandra ; Zedníková, Mária ; Růžička, Marek ; Drahoš, Jiří
This contribution deals with effect of coalescence on gas holdup and volumetric mass transfer coefficient in bubble column.
Interpretace CFD generovaných oscilací svazku bublin pro analýzu provozu bioreaktoru typu bublaná kolona
Fialová, Marie ; Staykov, P. ; Vlaev, S. D.
The aim of this study is to generate the unsteady flow behaviour of a bubble column bioreactor and to interpret its flow conditions in terms of oxygen availability in bioreactor performance analysis.
Použití metody ideálního a neideálního tlakového skoku pro kLa měření a vliv přídavku elektrolytu na zádrž plynu a kLa v probublávané koloně
Fialová, Marie ; Orvalho, Sandra ; Zedníková, Mária ; Růžička, Marek ; Drahoš, Jiří
The dependences of the volumetric liquid-side mass transfer coefficient, kLa and the gas holdup on gas superficial velocities (0.01-0.20 m s-1) in coalescent and non-coalescent media are presented. The effect of coalescence on kLa values and gas holdup in heterogeneous bubbling regime is discussed. The empirical relations for limiting dependences of kLa and gas holdup values for electrolyte addition in bubble column obtained from experimental data are presented.
Aplikace dynamické tlakové metody pro kLa měření v bublaných kolonách
Orvalho, S. ; Fialová, Marie ; Zedníková, Mária ; Drahoš, Jiří ; Růžička, Marek
Experiments were performed in a cylindrical bubble column 0.19 m in diameter and 4 m in height. Metal perforated plate with a constant free plate area 0.2 % and holes with diameters 0.5 mm was used for gas distribution. Air was used as gas phase, water and non-coalescent 0.5 M solution of sodium sulphate (Na2SO4) as liquid phases. The kLa values obtained using air in coalescent and non-coalescent batch are discussed. For the homogeneous regime an empirical correlation between kLaL and gas holdup ?G was found.
Lokální charakterizace tokového pole v bublané koloně generované pomocí CFD
Fialová, Marie ; Staykov, P. ; Vlaev, S.D.
This study is aimed at 3-D simulation of bubble column using commercial CFD code Fluent and generating experimental local gas hold-up distribution profiles at different bed height positions, comparing these profiles with model solutions and demonstrating the flow field variation (vector plots for air and liquid movement) obtained by CFD modeling. Overall gas volume fraction values predicted by the CFD simulation were matched to measured values and showed comparable. CFD modeling was found to describe satisfactorily bubble bed formation in the bubble column operating with water and low viscosity solution.
Effect of Liquid Phase Viscosity and Type of Gas Distributor on Gas Phase Mixing in Bubble Column Reactor
Fialová, Marie
Results of experiments proved essential effect of liquid phase viscosity and type of gas phase distributor on gas phase mixing in bubble column.
Effect of Gas Distributor and Column Geometry on Bubbling Regimes and Gas Holdup in Bubble Column Reactors
Fialová, Marie ; Zahradník, Jindřich ; Růžička, Marek ; Drahoš, Jiří ; Řezníčková, J.
This article deals with effect of gas distributor and column geometry on bubbling regimes and gas holdup in bubble column reactors.

National Repository of Grey Literature : 14 records found   1 - 10next  jump to record:
See also: similar author names
22 FIALOVÁ, Markéta
11 FIALOVÁ, Martina
9 FIALOVÁ, Michaela
1 FIALOVÁ, Miloslava
2 FIALOVÁ, Miroslava
4 Fialová, Magdaléna
2 Fialová, Marcela
1 Fialová, Margita
22 Fialová, Markéta
11 Fialová, Martina
9 Fialová, Michaela
2 Fialová, Michala
1 Fialová, Milena
2 Fialová, Miroslava
8 Fialová, Monika
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