Widely tunable (2-6THz) Terahertz vortex source

2018 ◽  
Author(s):  
Katsuhiko Miyamoto ◽  
Kazuki Sano ◽  
Tomohito Yamasaki ◽  
Takahiro Miyakawa ◽  
Takashige Omatsu
Keyword(s):  
Vortex Source

Continuous-wave, singly resonant parametric oscillator-based mid-infrared optical vortex source

2017 ◽  
Vol 42 (18) ◽  
pp. 3674 ◽  
Author(s):  
A. Aadhi ◽  
Varun Sharma ◽  
R. P. Singh ◽  
G. K. Samanta
Keyword(s):  
Continuous Wave ◽  
Optical Vortex ◽  
Parametric Oscillator ◽  
Mid Infrared ◽  
Vortex Source

Application of a Discrete Vortex, Source Distribution Model to Propeller Cavitation

1981 ◽  
Vol 25 (04) ◽  
pp. 264-270
Author(s):  
O. Frydenlund ◽  
B. Persson
Keyword(s):  
Substantial Improvement ◽  
Source Distribution ◽  
Distribution Model ◽  
Propeller Blade ◽  
Discrete Vortex ◽  
Sheet Cavitation ◽  
Linearized Theory ◽  
Vortex Source ◽  
Good Agreement

A linearized theory for the calculation of cavitation on a propeller in homogeneous flow is presented. The method enables a direct solution of the equations describing sheet cavitation on a propeller blade to be obtained without resorting to intermediate solutions of the fully wetted case. Good agreement is found between the computed extent of cavitation and the extent found in model experiments. The method shows a substantial improvement compared with other prediction methods where the determination of the cavity extent is based on the pressure distribution for the noncavitating case. Also shown is a comparison between computed and measured cavity shapes.

scholarly journals Quiet Ionospheric Currents and Earth Conductivity Profile Computed from Quiet-time Geomagnetic Field Changes in the Region of Australia

1987 ◽  
Vol 40 (1) ◽  
pp. 73 ◽  
Author(s):  
Wallace H Campbell ◽  
Edward R Schiffmacher
Keyword(s):  
Geomagnetic Field ◽  
Current System ◽  
Geomagnetic Latitude ◽  
Internal Field ◽  
Quiet Time ◽  
Ionospheric Currents ◽  
Conductivity Profile ◽  
Earth Conductivity ◽  
Quiet Day ◽  
Vortex Source

Equivalent ionospheric source currents representing the quiet-day geomagnetic field variations were established for a half-sector. of the Earth that included Australia. The analysis used a spherical harmonic separation of the external and internal fields for the extremely quiet conditions existing in 1965. Month-by-month behaviour of the current system indicated a clockwise vortex source with a maximum of 12.8xl04 A in January and a minimum of 4.4xl04 A in June. The focus location shifted from about -32�5� geomagnetic latitude in summer to about - 30.0� in winter. The separated external and internal field coefficients were used to estimate the Earth's upper mantle electrical conductivity (J" at a depth d from about 250 to 350 km as (J" =0�00067 exp(O� 012 d) S m - I and from about 350 to 550 km as (J" = 0�0014exp(0�0088d) Sm- I .

Vortex source flowing into vacuum under thermal crisis

2013 ◽  
Vol 58 (7) ◽  
pp. 960-967 ◽  
Author(s):  
A. N. Kucherov
Keyword(s):  
Thermal Crisis ◽  
Vortex Source

Explosive plasma-vortex source of optical emission

2008 ◽  
Vol 34 (1) ◽  
pp. 34-36 ◽  
Author(s):  
S. S. Bulanov ◽  
R. U. Esiev ◽  
M. N. Zharnikov ◽  
A. S. Kamrukov ◽  
I. V. Kozhevnikov ◽  
...  
Keyword(s):  
Optical Emission ◽  
Vortex Source

Mathematical Model of a Circular Lattice of Profiles with a Vortex Source

2017 ◽  
Vol 23 (10) ◽  
pp. 22-28
Author(s):  
V. Makarov ◽  
◽  
V. Potapov ◽  
N. Makarov ◽  
N. Udachina ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Vortex Source
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