A general review of the current development of mechanically agitated vessels

M Jaszczur, A Młynarczykowska - Processes, 2020 - mdpi.com
The mixing process in a mechanically agitated vessel is a widespread phenomenon which
plays an important role among industrial processes. In that process, one of the crucial …

Gas dispersion in non-Newtonian fluids with mechanically agitated systems: A review

P Lins Barros, F Ein-Mozaffari, A Lohi - Processes, 2022 - mdpi.com
Gas dispersion in non-Newtonian fluids is encountered in a broad range of chemical,
biochemical, and food industries. Mechanically agitated vessels are commonly employed in …

CFD simulations of gas–liquid–solid stirred reactor: Prediction of critical impeller speed for solid suspension

BN Murthy, RS Ghadge, JB Joshi - Chemical Engineering Science, 2007 - Elsevier
In this work, simulations have been performed for three phase stirred dispersions using
computational fluid dynamics model (CFD). The effects of tank diameter, impeller diameter …

Analysis of power consumption for gas dispersion in non-Newtonian fluids with a coaxial mixer: New correlations for Reynolds and power numbers

M Jamshidzadeh, A Kazemzadeh… - Chemical Engineering …, 2020 - Elsevier
Coaxial mixers are efficient in mixing of highly viscous fluids. The main objective of this study
was to assess the power consumption for the gas dispersion in carboxymethyl cellulose …

Local and overall gas holdup in an aerated coaxial mixing system containing a non‐Newtonian fluid

M Jamshidzadeh, F Ein‐Mozaffari, A Lohi - AIChE Journal, 2020 - Wiley Online Library
Gas dispersion in non‐Newtonian fluids is a challenging task due to the formation of large
cavities behind the impeller blades, which leads to the generation of very large bubbles. In …

New insights into the gas dispersion and mass transfer in shear-thinning fluids inside an aerated coaxial mixer via analysis of flow hydrodynamics and shear …

A Rahimzadeh, F Ein-Mozaffari… - Industrial & Engineering …, 2022 - ACS Publications
The performance of an agitated bioreactor is hampered by an intense shear environment
and low mass-transfer coefficient (k L a). The gas hold-up, k L a, and shear environment …

Intensified gas-liquid mixing in bioreactors equipped with a dual coaxial mixer containing biopolymer solutions

F Sharifi, E Behzadfar, F Ein-Mozaffari - Chemical Engineering Research …, 2023 - Elsevier
One of the significant challenges in the efficient operation of bioreactors is uniform gas
dispersion in very viscous non-Newtonian fluids because of the complex rheology exhibited …

Investigations on hydrodynamics and mass transfer in gas–liquid stirred reactor using computational fluid dynamics

P Ranganathan, S Sivaraman - Chemical engineering science, 2011 - Elsevier
In this work, the hydrodynamics and mass transfer in a gas–liquid dual turbine stirred tank
reactor are investigated using multiphase computational fluid dynamics coupled with …

Investigation of power consumption, torque fluctuation, and local gas hold-up in coaxial mixers containing a shear-thinning fluid: Experimental and numerical …

A Rahimzadeh, F Ein-Mozaffari, A Lohi - Chemical Engineering and …, 2022 - Elsevier
The performance of a coaxial bioreactor in the intensification of gas dispersion in shear-
thinning fluids in terms of the power consumption of the central and anchor impellers, torque …

Investigation of the detrimental effect of the rotational speed on gas holdup in non-Newtonian fluids with Scaba-anchor coaxial mixer: A paradigm shift in gas-liquid …

S Jegatheeswaran, F Ein-Mozaffari - Chemical Engineering Journal, 2020 - Elsevier
Our research findings challenge the paradigm that a high rotational speed of impellers can
intensify the gas dispersion. Interestingly, we observed the deterioration in the gas holdup at …