Screen effects on field emission from an array of one-dimensional nanostructures grown on silicon substrates: A simulation study using classical transport model

2007 ◽  
Vol 25 (2) ◽  
pp. 497 ◽  
Author(s):  
Yung-Chiang Lan ◽  
MingXun Yan ◽  
Wen-Jen Liu
Keyword(s):  
Field Emission ◽  
Simulation Study ◽  
Transport Model ◽  
Silicon Substrates ◽  
One Dimensional ◽  
Classical Transport ◽  
One Dimensional Nanostructures

scholarly journals Band-gap dependence of field emission from one-dimensional nanostructures grown onn-type andp-type silicon substrates

2003 ◽  
Vol 68 (12) ◽  
Author(s):  
C. S. Chang ◽  
S. Chattopadhyay ◽  
L. C. Chen ◽  
K. H. Chen ◽  
C. W. Chen ◽  
...  
Keyword(s):  
Band Gap ◽  
Field Emission ◽  
Silicon Substrates ◽  
One Dimensional ◽  
Type Silicon ◽  
One Dimensional Nanostructures

Correlation between Resistance and Field Emission Performance of Individual ZnO One-Dimensional Nanostructures

ACS Nano ◽  
2008 ◽  
Vol 2 (10) ◽  
pp. 2015-2022 ◽  
Author(s):  
Juncong She ◽  
Zhiming Xiao ◽  
Yuhua Yang ◽  
Shaozhi Deng ◽  
Jun Chen ◽  
...  
Keyword(s):  
Field Emission ◽  
One Dimensional ◽  
Emission Performance ◽  
Field Emission Performance ◽  
One Dimensional Nanostructures

One-dimensional Nanostructures for Photocatalytic Organic Synthesis

2015 ◽  
Vol 19 (6) ◽  
pp. 484-497 ◽  
Author(s):  
Chuang Han ◽  
Siqi Liu ◽  
Zi-Rong Tang ◽  
Yi-Jun Xu
Keyword(s):  
Organic Synthesis ◽  
One Dimensional ◽  
One Dimensional Nanostructures

scholarly journals Interaction of equivalence ratio fluctuations and flow fluctuations in acoustically forced swirl flames

2021 ◽  
pp. 175682772110155
Author(s):  
Vincent Kather ◽  
Finn Lückoff ◽  
Christian O. Paschereit ◽  
Kilian Oberleithner
Keyword(s):  
Equivalence Ratio ◽  
Transfer Functions ◽  
Transport Model ◽  
Mode Conversion ◽  
Fuel Injector ◽  
One Dimensional ◽  
Flow Fluctuations ◽  
Non Linear ◽  
Non Local ◽  
Acoustic Forcing

The generation and turbulent transport of temporal equivalence ratio fluctuations in a swirl combustor are experimentally investigated and compared to a one-dimensional transport model. These fluctuations are generated by acoustic perturbations at the fuel injector and play a crucial role in the feedback loop leading to thermoacoustic instabilities. The focus of this investigation lies on the interplay between fuel fluctuations and coherent vortical structures that are both affected by the acoustic forcing. To this end, optical diagnostics are applied inside the mixing duct and in the combustion chamber, housing a turbulent swirl flame. The flame was acoustically perturbed to obtain phase-averaged spatially resolved flow and equivalence ratio fluctuations, which allow the determination of flux-based local and global mixing transfer functions. Measurements show that the mode-conversion model that predicts the generation of equivalence ratio fluctuations at the injector holds for linear acoustic forcing amplitudes, but it fails for non-linear amplitudes. The global (radially integrated) transport of fuel fluctuations from the injector to the flame is reasonably well approximated by a one-dimensional transport model with an effective diffusivity that accounts for turbulent diffusion and dispersion. This approach however, fails to recover critical details of the mixing transfer function, which is caused by non-local interaction of flow and fuel fluctuations. This effect becomes even more pronounced for non-linear forcing amplitudes where strong coherent fluctuations induce a non-trivial frequency dependence of the mixing process. The mechanisms resolved in this study suggest that non-local interference of fuel fluctuations and coherent flow fluctuations is significant for the transport of global equivalence ratio fluctuations at linear acoustic amplitudes and crucial for non-linear amplitudes. To improve future predictions and facilitate a satisfactory modelling, a non-local, two-dimensional approach is necessary.

scholarly journals Subdiffusive Reaction Model of Molecular Species in Liquid Layers: Fractional Reaction-Telegraph Approach

2021 ◽  
Vol 5 (2) ◽  
pp. 51
Author(s):  
Ashraf M. Tawfik ◽  
Mohamed Mokhtar Hefny
Keyword(s):  
Molecular Species ◽  
Transport Model ◽  
Mean Square Displacement ◽  
Telegraph Equation ◽  
Reaction Model ◽  
Simulation Techniques ◽  
Experimental Works ◽  
The Mean ◽  
Classical Transport ◽  
Fractional Reaction

In recent years, different experimental works with molecular simulation techniques have been developed to study the transport of plasma-generated reactive species in liquid layers. Here, we improve the classical transport model that describes the molecular species movement in liquid layers via considering the fractional reaction–telegraph equation. We have considered the fractional equation to describe a non-Brownian motion of molecular species in a liquid layer, which have different diffusivities. The analytical solution of the fractional reaction–telegraph equation, which is defined in terms of the Caputo fractional derivative, is obtained by using the Laplace–Fourier technique. The profiles of species density with the mean square displacement are discussed in each case for different values of the time-fractional order and relaxation time.

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