scholarly journals CFD modelling of the flow and reactions in the Olympic Dam flash furnace smelter reaction shaft

2006 ◽  
Vol 30 (11) ◽  
pp. 1310-1325 ◽  
Author(s):  
Christopher B. Solnordal ◽  
Frank R.A. Jorgensen ◽  
Peter T.L. Koh ◽  
Arthur Hunt
Keyword(s):  
Flash Furnace ◽  
Cfd Modelling ◽  
Reaction Shaft ◽  
Olympic Dam

CFD Simulation and Performance Analysis of CJD Burner for Intensified Flash Smelting Process

2012 ◽  
Author(s):  
Zhuo Chen ◽  
Peng Long ◽  
Zhiqiang Sun ◽  
Jun Zhou ◽  
Jiemin Zhou
Keyword(s):  
Cfd Simulation ◽  
Flash Smelting ◽  
Smelting Process ◽  
Flash Furnace ◽  
Discrete Phase Model ◽  
Reaction Shaft ◽  
Technical Problems ◽  
Dust Generation ◽  
Discrete Phase ◽  
And Performance

The flash smelting process has been widely acknowledged as a successful modern pyro-metallurgical technology because of its good production flexibility. In past decades, great efforts have been put on the equipment improvement in order to achieve a highly intensive and efficient flash smelting process. However, along with the increasing of the productivity and the intensification of the process, technical problems such as the un-smelted materials accumulated in the settler and the dust generation ratio going higher are found occurring more frequently than before. All these problems however indicate degeneration in the performance of the central jet distributor (CJD) burner. A study was then made on the combustion and reaction processes in the flash furnace equipped with a CJD burner. A steady-state turbulent model was developed and a discrete phase model was included to investigate the velocity and temperature changes of both the gaseous and particle phases in the reaction shaft. The deviation of the numerical model is estimated to be less than 6%. The simulation results reveal a serious delay in the ignition of concentrate particles after they are fed into the furnace. Minor modification was also made by CFD computation, attempting to improve the particle ignition speed, but it was found not so effective. The main reason for the decreased smelting efficiency is found to be the poor mixing between the gaseous and particle phases under the intensified condition. These appeal for a great improvement in the performance of the CJD burner.

CFD MODELLING AND VALIDATION OF LOSS COEFFICIENTS FOR PENSTOCK BIFURCATIONS IN HYDROPOWER SCHEMES

2018 ◽  
Author(s):  
Kasturi Sukhapure ◽  
Alan Burns ◽  
Tariq Mahmud ◽  
Jake Spooner
Keyword(s):  
Cfd Modelling ◽  
Loss Coefficients

scholarly journals CFD modelling of an animal occupied zone using an anisotropic porous medium model with velocity depended resistance parameters

2021 ◽  
Vol 181 ◽  
pp. 105950
Author(s):  
E. Moustapha Doumbia ◽  
David Janke ◽  
Qianying Yi ◽  
Thomas Amon ◽  
Martin Kriegel ◽  
...  
Keyword(s):  
Porous Medium ◽  
Cfd Modelling ◽  
Medium Model ◽  
Anisotropic Porous Medium ◽  
Porous Medium Model ◽  
Occupied Zone

scholarly journals CFD Modelling of a Hydrogen/Air PEM Fuel Cell with a Serpentine Gas Distributor

Processes ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 564
Author(s):  
Alessandro d’Adamo ◽  
Matteo Riccardi ◽  
Massimo Borghi ◽  
Stefano Fontanesi
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Catalyst Layer ◽  
Active Surface ◽  
Reaction Rates ◽  
Transport Processes ◽  
Proton Exchange ◽  
Sustainable Mobility ◽  
Cfd Modelling ◽  
Gas Distributor

Hydrogen-fueled fuel cells are considered one of the key strategies to tackle the achievement of fully-sustainable mobility. The transportation sector is paying significant attention to the development and industrialization of proton exchange membrane fuel cells (PEMFC) to be introduced alongside batteries, reaching the goal of complete de-carbonization. In this paper a multi-phase, multi-component, and non-isothermal 3D-CFD model is presented to simulate the fluid, heat, and charge transport processes developing inside a hydrogen/air PEMFC with a serpentine-type gas distributor. Model results are compared against experimental data in terms of polarization and power density curves, including an improved formulation of exchange current density at the cathode catalyst layer, improving the simulation results’ accuracy in the activation-dominated region. Then, 3D-CFD fields of reactants’ delivery to the active electrochemical surface, reaction rates, temperature distributions, and liquid water formation are analyzed, and critical aspects of the current design are commented, i.e., the inhomogeneous use of the active surface for reactions, limiting the produced current and inducing gradients in thermal and reaction rate distribution. The study shows how a complete multi-dimensional framework for physical and chemical processes of PEMFC can be used to understand limiting processes and to guide future development.

CFD modelling of supercritical water reforming of glycerol for hydrogen production

2021 ◽  
Author(s):  
Ionela-Dorina Dumbrava ◽  
Calin-Cristian Cormos ◽  
Arpad Imre-Lucaci ◽  
Ana-Maria Cormos
Keyword(s):  
Hydrogen Production ◽  
Supercritical Water ◽  
Cfd Modelling
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