Application of a nonisentropic full potential method to AGARD standard airfoils

1988 ◽  
Author(s):  
WOODROW WHITLOW, JR.
Keyword(s):  
Potential Method ◽  
Full Potential

First-Principles and Experimental Study on Cu Doped SnO2 Structure

2013 ◽  
Vol 470 ◽  
pp. 35-38 ◽  
Author(s):  
Lin Ting Shan ◽  
De Chun Ba ◽  
Xiao Bo Han
Keyword(s):  
Thin Films ◽  
First Principles ◽  
Annealing Temperature ◽  
Sol Gel ◽  
Rutile Phase ◽  
Potential Method ◽  
Full Potential ◽  
X Ray Diffraction ◽  
Copper Addition ◽  
Linearized Augmented Plane Wave

SnO2 and Cu-SnO2 thin films were fabricated by the sol-gel method. The influence of annealing temperature and copper addition on the morphology and microstructure of the films was studied using X-ray diffraction (XRD) and UV-Visible, respectively. The results show that the tetragonal rutile phase is evidenced by XRD with no other phases observed. The crystallinity of SnO2 and Cu-SnO2 thin films had been improved with the increasing annealing temperature. The grain size decreased after Cu doping. On theoretical, Pure and Cu-SnO2 were calculated by first-principles full potential linearized augmented plane wave ultra-soft pseudo-potential method to investigate band structure.

Inviscid drag prediction for transonic transport wings using a full-potential method

1991 ◽  
Vol 28 (12) ◽  
pp. 869-875 ◽  
Author(s):  
J. van der Vooren ◽  
A. J. van der Wees
Keyword(s):  
Potential Method ◽  
Full Potential ◽  
Drag Prediction

scholarly journals The energy distribution among the positive ions at the cathode the glow discharge through gases

1932 ◽  
Vol 137 (833) ◽  
pp. 662-676 ◽  
Keyword(s):  
Glow Discharge ◽  
Energy Distribution ◽  
Potential Drop ◽  
Potential Method ◽  
Full Potential ◽  
Cathode Fall ◽  
Positive Ions ◽  
Dark Space ◽  
Positive Ion ◽  
Made In

The energy distribution among the positive ions which strike the cathode of the glow-discharge through gases is of some importance in the theory of the phenomenon, and as very little is known about the mean-free-paths of ions in gases it is difficult to make an estimate of this distribution. Attempts have been made in the past to measure this quantity by perforating the cathode and applying retarding potentials to the ions which penetrate through. The positive ion photographs obtained by the parabola method of Sir J. J. Thomson give information concerning the distribution in a strongly abnormal discharge. These last, and observations of the Doppler effect in canal-rays, suggest that there are particles present with energies corresponding with a fall through the full potential drop across the dark-space, while the retarding potential measurements of Von Hippel show a sharp upper limit to the energy at between 0·3 and 0·5 of the total cathode fall. The dark-space stretches over 20 to 100 molecular free-paths, so that if ions are present with the full energy corresponding to the cathode fall they must have relatively long free-paths in the dark-space. We have carried out measurements of the energy distribution among the positive ions which penetrated through a slit in a plane cathode into an evacuated space beyond, by a retarding potential method and by the method of focussing at 127° 17' in an inverse first power electrostatic field.

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