2008
DOI: 10.1063/1.2825670
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Comparative study of two- and three-dimensional modeling on arc discharge phenomena inside a thermal plasma torch with hollow electrodes

Abstract: A comparative study between two-and three-dimensional ͑2D and 3D͒ modeling is carried out on arc discharge phenomena inside a thermal plasma torch with hollow electrodes, in order to evaluate the effects of arc root configuration characterized by either 2D annular or 3D highly localized attachment on the electrode surface. For this purpose, a more precise 3D transient model has been developed by taking account of 3D arc current distribution and arc root rotation. The 3D simulation results apparently reveal tha… Show more

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Cited by 22 publications
(16 citation statements)
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References 34 publications
(59 reference statements)
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“…In the numerical simulation, the governing fluid equations consisting of mass, momentum, and energy conservation are solved under the steady-state, twodimensional, and axis-symmetric conditions. Although the turbulent thermal plasma is an inherently threedimensional time transient phenomena, a time averaged axis-symmetric modeling on thermal plasma jets have been in good agreement with experimentally measured results [50][51][52]. Since the k-ε turbulence model is widely used for turbulent thermal plasma flow modeling, it is also incorporated to include turbulence effects [53].…”
Section: Numerical Analysis On Thermal Plasma Flowsupporting
confidence: 48%
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“…In the numerical simulation, the governing fluid equations consisting of mass, momentum, and energy conservation are solved under the steady-state, twodimensional, and axis-symmetric conditions. Although the turbulent thermal plasma is an inherently threedimensional time transient phenomena, a time averaged axis-symmetric modeling on thermal plasma jets have been in good agreement with experimentally measured results [50][51][52]. Since the k-ε turbulence model is widely used for turbulent thermal plasma flow modeling, it is also incorporated to include turbulence effects [53].…”
Section: Numerical Analysis On Thermal Plasma Flowsupporting
confidence: 48%
“…(1) plasma characteristics in the arc discharge region of the torch interior are numerically analyzed by using a MHD (magnetohydrodynamics) code which has been developed to simulated thermal plasmas [46][47][48][49][50]. Second, the thermal plasma characteristics inside the decomposition reactor region where a complex thermal flow mixture between plasmas jet and waste gas is formed, can be precisely and stably simulated by using a commercial CFD (computational fluid dynamics) code, FLUENT (ANSYS), which has been widely used for solving complex hydrodynamic flows.…”
Section: Numerical Analysis On Thermal Plasma Flowmentioning
confidence: 99%
“…For the numerical simulation, the governing fluid equations consisting of mass, momentum and energy conservation, were solved under the steady-state, two-dimensional, and axis-symmetric conditions. Although the arc discharge is an inherently three-dimensional time transient phenomena, an axis-symmetric steady-state modeling on thermal plasma jet have been in good agreement with experimentally measured results (7)(8)(9) . Because both the constricted arc column and the enhanced mixing effects of the turbulent flow are responsible for the gradual relaxation of the time transient three-dimensional structures of plasma fields into the steady-state two-dimensional axis-symmetric fields (9) .…”
Section: Numerical Simulation Methodssupporting
confidence: 68%
“…In order to include radiation effects, optically thin plasma with the net emission coefficient in a local thermodynamic equilibrium (LTE) state was assumed (10) . Since the k-ε turbulence model has been widely used for a numerical modeling for the high velocity arc plasma jet, it was also incorporated to include turbulence effects inside the arc heater (4)(5)(6)(7)(8)(9)(10)(11) .…”
Section: Numerical Simulation Methodsmentioning
confidence: 99%
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