Results 11 to 20 of about 580 (146)

Fluid Dynamic in Bubble Columns with Heat Exchanger Internals [PDF]

Engineering and Technology Journal, 2014
The effects of vertical cooling internals on the gas hydrodynamics was studied in gas-liquid system (bubble columns) for column diameters, 15 and 30 cm in the absence and presence of internals (the % occluded area by internals 5, 10, and 20%).
Burhan Sadeq Abdulrazzaq
doaj   +1 more source

Prediction of Small Bubble Holdups in Bubble Columns Operated with Various Organic Liquids at Both Ambient and Elevated Pressures and Temperatures

Fluids, 2023
This article focuses on the prediction of the small bubble holdups (assuming the existence of two major bubble classes) in two bubble columns (0.289 m in ID and 0.102 m in ID), operated with organic liquids under various conditions (including high ...
Stoyan Nedeltchev
doaj   +1 more source

Investigation of the Gas-Liquid Flow in an Agitated Vessel Equipped with an ASI Impeller by Using Tomography Method [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2020
In this study, the hydrodynamics of the gas dispersion in an aerated vessel equipped with a newly designed impeller (ASI impeller), a combination of the pitched blade turbine and the Scaba impeller was investigated.
Fariba Khalili, Mohammad Reza Jafari Nasr, Farhad Mozaffari, Mohammad Soltanieh   +3 more
doaj   +1 more source

CFD SIMULATION OF BUBBLE COLUMN REACTOR BY INVESTIGATING THE EFFECT OF TRAYS ON OVERALL GAS HOLDUP

The Nucleus, 2020
In the current research work, CFD model has been developed to estimate overall gas holdup for co-current air-water system in a Trayed Bubble Column Reactor (TBCR), operating in bubbly flow regime. The TBCR considered in this study has 19 cm inner diameter and 274 cm length.
Arif Khan, Samrana Sharif, A. N. K. Wardag, I. R. Chughtai, M. H. Al-Dahhan   +4 more
openaire   +1 more source

Hydrodynamics of a self-agitated draft tube airlift reactor [PDF]

Chemical Industry and Chemical Engineering Quarterly, 2014
The main hydrodynamic characteristics of a novel-constructed, self-agitated draft tube airlift reactor (DT-ALR) were investigated. Ten impellers, driven only by the means of gas throughput and induced liquid circulation, were inserted in the ...
Tekić Miodrag N., Šijački Ivana M., Tokić Milenko S., Kojić Predrag S., Petrović Dragan Lj., Lukić Nataša Lj., Popović Svetlana S.   +6 more
doaj   +1 more source

Hydrodynamics and Mass Transfer in a Concentric Internal Jet-Loop Airlift Bioreactor Equipped with a Deflector

Energies, 2021
The gas–liquid hydrodynamics and mass transfer were studied in a concentric tube internal jet-loop airlift reactor with a conical bottom. Comparing with a standard design, the gas separator was equipped with an adjustable deflector placed above the riser.
Radek Šulc, Jan Dymák
doaj   +1 more source

Identification of Local Isotropic Turbulence Conditions in Various Bubble Columns Based on Several Reliable Parameters

Fluids, 2023
Bubble columns (BCs) are widely used in the chemical industry. In many industrial applications, these important gas-liquid contactors operate in a churn-turbulent flow regime.
Stoyan Nedeltchev
doaj   +1 more source

Phases distribution in slurry bubble columns: Insights from single-source computed tomography and gas holdup measurements

, 2023
In this study, a cylindrical stainless-steel column with dimensions of 250 cm in height and 16.2 cm in diameter was employed to investigate how fluid properties influence phase distribution within slurry bubble columns.
Mahmoud M. Taha, Al-Dahhan, Muthanna H., Muthanna H. Al-Dahhan, Shaikh, Ashfaq, Ashfaq Shaikh, Taha, Mahmoud M.   +5 more
core   +1 more source

An Explicit Analytical Solution for Transient Two-Phase Flow in Inclined Fluid Transmission Lines

Fluids, 2021
Due to the complex nonlinearity characteristics, analytical modeling of compressible flow in inclined transmission lines remains a challenge. This paper proposes an analytical model for one-dimensional flow of a two-phase gas-liquid fluid in inclined ...
Taoufik Wassar, Matthew A. Franchek, Hamdi Mnasri, Yingjie Tang   +3 more
doaj   +1 more source

An Assessment of Drag Models in Eulerian–Eulerian CFD Simulation of Gas–Solid Flow Hydrodynamics in Circulating Fluidized Bed Riser

ChemEngineering, 2020
Accurate prediction of the hydrodynamic profile is important for circulating fluidized bed (CFB) reactor design and scale-up. Multiphase computational fluid dynamics (CFD) simulation with interphase momentum exchange is key to accurately predict the gas ...
Mukesh Upadhyay, Ayeon Kim, Heehyang Kim, Dongjun Lim, Hankwon Lim   +4 more
doaj   +1 more source