scholarly journals Two-dimensional AXUV-based radiated power density diagnostics on NSTX-U

2014 ◽  
Vol 85 (11) ◽  
pp. 11D856 ◽  
Author(s):  
I. Faust ◽  
L. Delgado-Aparicio ◽  
R. E. Bell ◽  
K. Tritz ◽  
A. Diallo ◽  
...  
Keyword(s):  
Power Density ◽  
Two Dimensional ◽  
Radiated Power ◽  
Density Diagnostics

scholarly journals Towards explicit regulating-ion-transport: nanochannels with only function-elements at outer-surface

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Qun Ma ◽  
Yu Li ◽  
Rongsheng Wang ◽  
Hongquan Xu ◽  
Qiujiao Du ◽  
...  
Keyword(s):  
Ion Transport ◽  
Numerical Simulations ◽  
Power Density ◽  
Outer Surface ◽  
Internal Resistance ◽  
Porous Membranes ◽  
Two Dimensional ◽  
Ionic Selectivity ◽  
Key Features ◽  
Energy Conversion Devices

AbstractFunction elements (FE) are vital components of nanochannel-systems for artificially regulating ion transport. Conventionally, the FE at inner wall (FEIW) of nanochannel−systems are of concern owing to their recognized effect on the compression of ionic passageways. However, their properties are inexplicit or generally presumed from the properties of the FE at outer surface (FEOS), which will bring potential errors. Here, we show that the FEOS independently regulate ion transport in a nanochannel−system without FEIW. The numerical simulations, assigned the measured parameters of FEOS to the Poisson and Nernst-Planck (PNP) equations, are well fitted with the experiments, indicating the generally explicit regulating-ion-transport accomplished by FEOS without FEIW. Meanwhile, the FEOS fulfill the key features of the pervious nanochannel systems on regulating-ion-transport in osmotic energy conversion devices and biosensors, and show advantages to (1) promote power density through concentrating FE at outer surface, bringing increase of ionic selectivity but no obvious change in internal resistance; (2) accommodate probes or targets with size beyond the diameter of nanochannels. Nanochannel-systems with only FEOS of explicit properties provide a quantitative platform for studying substrate transport phenomena through nanoconfined space, including nanopores, nanochannels, nanopipettes, porous membranes and two-dimensional channels.

Lamellar Porous Vermiculite Membranes for Boosting Nanofluidic Osmotic Energy Conversion

2021 ◽  
Author(s):  
Li Cao ◽  
Hong Wu ◽  
Chunyang Fan ◽  
Zhiming Zhang ◽  
Benbing Shi ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Power Density ◽  
Great Promise ◽  
Two Dimensional ◽  
Nanofluidic Channels ◽  
Salinity Gradients ◽  
Transmembrane Resistance

Lamellar membranes with two-dimensional nanofluidic channels hold great promise in harvesting osmotic energy from salinity gradients. However, the power density is often limited by the high transmembrane resistance primarily caused...

3.8 W/mm RF Power Density for ALD Al2O3-Based Two-Dimensional Hole Gas Diamond MOSFET Operating at Saturation Velocity

2019 ◽  
Vol 40 (2) ◽  
pp. 279-282 ◽  
Author(s):  
Shoichiro Imanishi ◽  
Kiyotaka Horikawa ◽  
Nobutaka Oi ◽  
Satoshi Okubo ◽  
Taisuke Kageura ◽  
...  
Keyword(s):  
Power Density ◽  
Two Dimensional ◽  
Rf Power ◽  
Saturation Velocity

Parametric Study of the Two-Dimensional Keyhole Model for High Power Density Welding Processes

1994 ◽  
Vol 116 (1) ◽  
pp. 209-214 ◽  
Author(s):  
Charn-Jung Kim ◽  
Sangken Kauh ◽  
Sung Tack Ro ◽  
Joon Sik Lee
Keyword(s):  
Power Density ◽  
High Power ◽  
Parametric Study ◽  
Arc Welding ◽  
Electron Beam Welding ◽  
High Power Density ◽  
Two Dimensional ◽  
Position Correction ◽  
Welding Processes ◽  
The Mathematical Model

This study presents a parametric study of the two-dimensional steady-state keyhole model for high power density welding processes. Keyhole formation is common to electron beam welding, laser welding, and plasma arc welding, all of which are important techniques for high-quality, high-precision welding. Computation was performed by adopting a recently developed concept of the position correction and modifying it suitably for the problem of interest. The dimensionless parameters pertaining to the model were identified and the influence of each parameter was investigated separately. Although the mathematical model employed here has been used in previous studies, a thorough investigation successfully revealed new features that have not been previously recognized in the literature.

Two dimensional radiated power diagnostics on Alcator C-Mod

2008 ◽  
Vol 79 (10) ◽  
pp. 10F306 ◽  
Author(s):  
M. L. Reinke ◽  
I. H. Hutchinson
Keyword(s):  
Two Dimensional ◽  
Radiated Power

scholarly journals High output power density from GaN-based two-dimensional nanorod light-emitting diode arrays

2009 ◽  
Vol 94 (14) ◽  
pp. 141111 ◽  
Author(s):  
Ya-Ju Lee ◽  
Shawn-Yu Lin ◽  
Ching-Hua Chiu ◽  
Tien-Chang Lu ◽  
Hao-Chung Kuo ◽  
...  
Keyword(s):  
Power Density ◽  
Output Power ◽  
Light Emitting Diode ◽  
Two Dimensional ◽  
High Output Power ◽  
Light Emitting ◽  
High Output

scholarly journals Stratified Kelvin-Helmholtz turbulence of compressible shear flows

2018 ◽  
Author(s):  
Romit Maulik ◽  
Omer San
Keyword(s):  
Power Density ◽  
Spatial Resolution ◽  
Shear Flows ◽  
Incompressible Flows ◽  
Three Dimensional ◽  
Structure Functions ◽  
Compressible Turbulence ◽  
Power Density Spectrum ◽  
Two Dimensional ◽  
Density Spectrum

Abstract. We study the scaling laws and structure functions of stratified shear flows by performing high-resolution numerical simulations of inviscid compressible turbulence induced by Kelvin-Helmholtz instability. An implicit large eddy simulation approach is adapted to solve our conservation laws for both two-dimensional (with a spatial resolution of 16,3842) and three-dimensional (with a spatial resolution of 5123) configurations utilizing different compressibility characteristics such as shocks. For three-dimensional turbulence, we find that both kinetic energy and density-weighted energy spectra follow the classical Kolmogorov k−5/3 inertial scaling. This phenomenon is observed due to the fact that the power density spectrum of three-dimensional turbulence yields the same k−5/3 scaling. However, we demonstrate that there is a significant difference between these two spectra in two-dimensional turbulence since the power density spectrum flattens to k−1/4. This flattening may be assumed to be a reason for the k−7/3 scaling observed in the two-dimensional density-weight kinetic every spectra for high compressibility as compared to the k−3 scaling traditionally assumed with incompressible flows. Further inquiries are made to validate the statistical behavior of the various configurations studied through the use of second and third order velocity structure functions where it is noticed that scaling behavior differs between the two- and three-dimensional cases wherein only the latter is seen to follow trends from K41 theory.

Bolometer diagnostics for one- and two-dimensional measurements of radiated power on the Large Helical Device

2003 ◽  
Vol 45 (7) ◽  
pp. 1167-1182 ◽  
Author(s):  
B J Peterson ◽  
A Yu Kostrioukov ◽  
N Ashikawa ◽  
Y Liu ◽  
Yuhong Xu ◽  
...  
Keyword(s):  
Two Dimensional ◽  
Radiated Power ◽  
Dimensional Measurements
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