Computation of Ion Drag Force and Charge on a Static Spherical Dust Grain in RF Plasma

2008 ◽  
Author(s):  
V. R. Ikkurthi ◽  
K. Matyash ◽  
R. Schneider ◽  
A. Melzer ◽  
José Tito Mendonça ◽  
...  
Keyword(s):  
Drag Force ◽  
Rf Plasma ◽  
Dust Grain

Ion drag force on a dust grain in a weakly ionized collisional plasma

2013 ◽  
Vol 20 (1) ◽  
pp. 013701 ◽  
Author(s):  
I. L. Semenov ◽  
A. G. Zagorodny ◽  
I. V. Krivtsun
Keyword(s):  
Drag Force ◽  
Collisional Plasma ◽  
Weakly Ionized ◽  
Dust Grain

Computation of ion drag force on a static spherical dust grain immersed in rf discharges

2009 ◽  
Vol 16 (4) ◽  
pp. 043703 ◽  
Author(s):  
V. R. Ikkurthi ◽  
K. Matyash ◽  
A. Melzer ◽  
R. Schneider
Keyword(s):  
Drag Force ◽  
Rf Discharges ◽  
Dust Grain

On the drag force on non-spherical dust grain

2010 ◽  
Vol 77 (2) ◽  
pp. 271-276 ◽  
Author(s):  
S. I. KRASHENINNIKOV ◽  
D. A. MENDIS
Keyword(s):  
Flow Velocity ◽  
Drag Force ◽  
Plasma Flow ◽  
Dust Grain ◽  
Grain Dynamics

AbstractIt is shown that the direction of the drag force imposed on non-spherical grain by plasma flow is not necessarily aligned with the flow velocity. The implications of this fact for a grain dynamics are discussed.

Characterization of homoepitaxial diamond films by Electron microscopy

1991 ◽  
Vol 49 ◽  
pp. 880-881
Author(s):  
D.P. Malta ◽  
S.A. Willard ◽  
R.A. Rudder ◽  
G.C. Hudson ◽  
J.B. Posthill ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Surface Defects ◽  
Substrate Surface ◽  
Diamond Films ◽  
Chemical Vapor ◽  
Polycrystalline Diamond ◽  
Large Degree ◽  
Rf Plasma ◽  
Semiconducting Diamond

Semiconducting diamond films have the potential for use as a material in which to build active electronic devices capable of operating at high temperatures or in high radiation environments. A major goal of current device-related diamond research is to achieve a high quality epitaxial film on an inexpensive, readily available, non-native substrate. One step in the process of achieving this goal is understanding the nucleation and growth processes of diamond films on diamond substrates. Electron microscopy has already proven invaluable for assessing polycrystalline diamond films grown on nonnative surfaces.The quality of the grown diamond film depends on several factors, one of which is the quality of the diamond substrate. Substrates commercially available today have often been found to have scratched surfaces resulting from the polishing process (Fig. 1a). Electron beam-induced current (EBIC) imaging shows that electrically active sub-surface defects can be present to a large degree (Fig. 1c). Growth of homoepitaxial diamond films by rf plasma-enhanced chemical vapor deposition (PECVD) has been found to planarize the scratched substrate surface (Fig. 1b).

Experimental Study of Flow Control Over a Standard Road Vehicle Using Plasma Actuator

2020 ◽  
Vol 22 (4) ◽  
pp. 1047-1060
Author(s):  
S. Shadmani ◽  
S. M. Mousavi Nainiyan ◽  
R. Ghasemiasl ◽  
M. Mirzaei ◽  
S. G. Pouryoussefi
Keyword(s):  
Flow Control ◽  
Pressure Distribution ◽  
Drag Force ◽  
Separated Flow ◽  
Plasma Actuator ◽  
Road Vehicle ◽  
Slant Angle ◽  
Total Drag ◽  
Slant Surface ◽  
Ahmed Body

AbstractAhmed Body is a standard and simplified shape of a road vehicle that's rear part has an important role in flow structure and it's drag force. In this paper flow control around the Ahmed body with the rear slant angle of 25° studied by using the plasma actuator system situated in middle of the rear slant surface. Experiments conducted in a wind tunnel in two free stream velocities of U = 10m/s and U = 20m/s using steady and unsteady excitations. Pressure distribution and total drag force were measured and smoke flow visualization carried out in this study. The results showed that at U = 10m/s using plasma actuator suppress the separated flow over the rear slant slightly and be effective on pressure distribution. Also, total drag force reduces in steady and unsteady excitations for 3.65% and 2.44%, respectively. At U = 20m/s, using plasma actuator had no serious effect on the pressure distribution and total drag force.

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