One-Dimensional Fluid Model of Pulse Modulated Radio-Frequency SiH4/N2/O2Discharge

2012 ◽  
Vol 14 (2) ◽  
pp. 107-110
Author(s):  
Yan Wang ◽  
Xiangmei Liu ◽  
Yuanhong Song ◽  
Younian Wang
Keyword(s):  
Radio Frequency ◽  
Fluid Model ◽  
One Dimensional

Modeling of a capacitively coupled radio-frequency methane plasma: Comparison between a one-dimensional and a two-dimensional fluid model

2002 ◽  
Vol 92 (5) ◽  
pp. 2290-2295 ◽  
Author(s):  
D. Herrebout ◽  
A. Bogaerts ◽  
M. Yan ◽  
R. Gijbels ◽  
W. Goedheer ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Fluid Model ◽  
Two Dimensional ◽  
Capacitively Coupled ◽  
One Dimensional

A Physically Based, One-Dimensional Two-Fluid Model for Direct Contact Condensation of Steam Jets Submerged in Subcooled Water

2015 ◽  
Vol 1 (2) ◽  
Author(s):  
David Heinze ◽  
Thomas Schulenberg ◽  
Lars Behnke
Keyword(s):  
Direct Contact ◽  
Two Phase Flow ◽  
Fluid Model ◽  
Interfacial Area ◽  
Phase Flow ◽  
Two Phase ◽  
One Dimensional ◽  
Two Fluid Model ◽  
Contact Condensation ◽  
Two Fluid

A simulation model for the direct contact condensation of steam in subcooled water is presented that allows determination of major parameters of the process, such as the jet penetration length. Entrainment of water by the steam jet is modeled based on the Kelvin–Helmholtz and Rayleigh–Taylor instability theories. Primary atomization due to acceleration of interfacial waves and secondary atomization due to aerodynamic forces account for the initial size of entrained droplets. The resulting steam-water two-phase flow is simulated based on a one-dimensional two-fluid model. An interfacial area transport equation is used to track changes of the interfacial area density due to droplet entrainment and steam condensation. Interfacial heat and mass transfer rates during condensation are calculated using the two-resistance model. The resulting two-phase flow equations constitute a system of ordinary differential equations, which is solved by means of the explicit Runge–Kutta–Fehlberg algorithm. The simulation results are in good qualitative agreement with published experimental data over a wide range of pool temperatures and mass flow rates.

A self-consistent fluid model for radio-frequency discharges in SiH4–H2 compared to experiments

1997 ◽  
Vol 82 (5) ◽  
pp. 2060-2071 ◽  
Author(s):  
G. J. Nienhuis ◽  
W. J. Goedheer ◽  
E. A. G. Hamers ◽  
W. G. J. H. M. van Sark ◽  
J. Bezemer
Keyword(s):  
Radio Frequency ◽  
Fluid Model ◽  
Self Consistent ◽  
Radio Frequency Discharges

scholarly journals Dissipation of turbulence by magnetohydrodynamic shock waves

2015 ◽  
Vol 11 (S315) ◽  
Author(s):  
Andrew Lehmann ◽  
Mark Wardle
Keyword(s):  
Shock Front ◽  
Fluid Model ◽  
Neutral Species ◽  
One Dimensional ◽  
Neutral Gas ◽  
Gas Dynamic ◽  
Magnetohydrodynamic Shock ◽  
Two Fluid Model ◽  
Ion Species ◽  
Two Fluid

AbstractWe characterise steady, one-dimensional fast and slow magnetohydrodynamic (MHD) shocks using a two-fluid model. Fast MHD shocks are magnetically driven, forcing ions to stream through the neutral gas ahead of the shock front. This magnetic precursor heats the gas sufficiently to create a large, warm transition zone where all fluid variables only weakly change in the shock front. In contrast, slow MHD shocks are driven by gas pressure where neutral species collide with ion species in a thin hot slab that closely resembles an ordinary gas dynamic shock.We computed observational diagnostics for fast and slow shocks at velocities vs=2–4 km/s and preshock Hydrogen nuclei densities nH = 102-4 cm−3. We followed the abundances of molecules relevant for a simple oxygen chemistry and include cooling by CO, H2 and H2O. Estimates of intensities of 12CO rotational lines show that high-J lines, above J = 6 → 5, are more strongly excited in slow MHD shocks.

scholarly journals Recombination Parameters in InGaAsSb Epitaxial Layers for Thermophotovoltaic Applications

2003 ◽  
Vol 763 ◽  
Author(s):  
R. J. Kumar ◽  
R. J. Gutmann ◽  
J.M. Borrego ◽  
P. S. Dutta ◽  
C. A. Wang ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Radiative Recombination ◽  
Surface Recombination ◽  
Surface Recombination Velocity ◽  
Recombination Coefficient ◽  
Epitaxial Layers ◽  
Capping Layer ◽  
One Dimensional ◽  
Recombination Velocity

AbstractRadio-frequency (RF) photoreflectance measurements and one-dimensional device simulations have been used to evaluate bulk recombination parameters and surface recombination velocity (SRV) in doubly-capped 0.55-eV p-InGaAsSb epitaxial layers, doped at 2 × 1017 cm-3, for thermophotovoltaic (TPV) applications. Bulk lifetimes of 90 to 100 ns and SRVs of 680 cm/s to 3200 cm/s (depending on the capping layer) are obtained, with higher doping and higher bandgap capping layers most effective in reducing SRV. RF photoreflectance measurements and one-dimensional device simulations are compatible with a radiative recombination coefficient (B) of 3 × 10-11 cm3/s and Auger coefficient (C) of 1 × 10-28 cm6/s.

An Upwind Numerical Method for a Hyperbolic One-Dimensional Two-Fluid Model

2011 ◽  
Author(s):  
Youn-Gyu Jung ◽  
Moon-Sun Chung ◽  
Sung-Jae Yi
Keyword(s):  
Numerical Method ◽  
Fluid Model ◽  
Equation System ◽  
Benchmark Problems ◽  
Two Phase ◽  
One Dimensional ◽  
Flow Problems ◽  
Complete Set ◽  
Two Fluid Model ◽  
Two Fluid

This study discusses on the implementation of an upwind method for a one-dimensional two-fluid model including the surface tension effect in the momentum equations. This model consists of a complete set of six equations including two-mass, two-momentum, and two-internal energy conservation equations having all real eigenvalues. Based on this equation system with upwind numerical method, the present authors first make a pilot code and then solve some benchmark problems to verify whether this model and numerical method is able to properly solve some fundamental one-dimensional two-phase flow problems or not.

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