scholarly journals Theoretical studies of shock dynamics in two-dimensional structures V. Microscopic constraints on shock-induced signals

1982 ◽  
Author(s):  
A. M. Karo ◽  
F. E. Walker ◽  
W. G. Cunningham ◽  
J. R. Hardy
Keyword(s):  
Theoretical Studies ◽  
Two Dimensional ◽  
Shock Dynamics

scholarly journals Piezoelectric property comparison of two-dimensional ZnO nanostructures for energy harvesting devices

RSC Advances ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 3363-3370
Author(s):  
Ang Yang ◽  
Yu Qiu ◽  
Dechao Yang ◽  
Kehong Lin ◽  
Shiying Guo
Keyword(s):  
Energy Harvesting ◽  
Piezoelectric Property ◽  
Piezoelectric Effect ◽  
Theoretical Studies ◽  
Two Dimensional ◽  
Zno Nanostructures ◽  
Energy Harvesting Devices ◽  
Experimental And Theoretical Studies

In this paper, experimental and theoretical studies of the piezoelectric effect of two-dimensional ZnO nanostructures, including straight nanosheets (SNSs) and curved nanosheets (CNSs) are conducted.

scholarly journals Shock dynamics in periodic two-dimensional composites

2020 ◽  
Author(s):  
Lauren L. Poole ◽  
Manny Gonzales ◽  
Abdel R. Moustafa ◽  
Austin R. C. Gerlt ◽  
Zachary C. Cordero
Keyword(s):  
Two Dimensional ◽  
Shock Dynamics

Steady detonation propagation in a circular arc: a Detonation Shock Dynamics model

2016 ◽  
Vol 807 ◽  
pp. 87-134 ◽  
Author(s):  
Mark Short ◽  
James J. Quirk ◽  
Chad D. Meyer ◽  
Carlos Chiquete
Keyword(s):  
Surface Wave ◽  
Angular Speed ◽  
Order Correction ◽  
Two Dimensional ◽  
Normal Surface ◽  
Circular Arc ◽  
First Order ◽  
Shock Dynamics ◽  
First Order Correction ◽  
Steady Detonation

We study the physics of steady detonation wave propagation in a two-dimensional circular arc via a Detonation Shock Dynamics (DSD) surface evolution model. The dependence of the surface angular speed and surface spatial structure on the inner arc radius ($R_{i}$), the arc thickness ($R_{e}-R_{i}$, where $R_{e}$ is the outer arc radius) and the degree of confinement on the inner and outer arc is examined. We first analyse the results for a linear $D_{n}$–$\unicode[STIX]{x1D705}$ model, in which the normal surface velocity $D_{n}=D_{CJ}(1-B\unicode[STIX]{x1D705})$, where $D_{CJ}$ is the planar Chapman–Jouguet velocity, $\unicode[STIX]{x1D705}$ is the total surface curvature and $B$ is a length scale representative of a reaction zone thickness. An asymptotic analysis assuming the ratio $B/R_{i}\ll 1$ is conducted for this model and reveals a complex surface structure as a function of the radial variation from the inner to the outer arc. For sufficiently thin arcs, where $(R_{e}-R_{i})/R_{i}=O(B/R_{i})$, the angular speed of the surface depends on the inner arc radius, the arc thickness and the inner and outer arc confinement. For thicker arcs, where $(R_{e}-R_{i})/R_{i}=O(1)$, the angular speed does not depend on the outer arc radius or the outer arc confinement to the order calculated. It is found that the leading-order angular speed depends only on $D_{CJ}$ and $R_{i}$, and corresponds to a Huygens limit (zero curvature) propagation model where $D_{n}=D_{CJ}$, assuming a constant angular speed and perfect confinement on the inner arc surface. Having the normal surface speed depend on curvature requires the insertion of a boundary layer structure near the inner arc surface. This is driven by an increase in the magnitude of the surface wave curvature as the inner arc surface is approached that is needed to meet the confinement condition on the inner arc surface. For weak inner arc confinement, the surface wave spatial variation with the radial coordinate is described by a triple-deck structure. The first-order correction to the angular speed brings in a dependence on the surface curvature through the parameter $B$, while the influence of the inner arc confinement on the angular velocity only appears in the second-order correction. For stronger inner arc confinement, the surface wave structure is described by a two-layer solution, where the effect of the confinement on the angular speed is promoted to the first-order correction. We also compare the steady-state arc solution for a PBX 9502 DSD model to an experimental two-dimensional arc geometry validation test.

scholarly journals Theoretical studies of the phase transition in the anisotropic two-dimensional square spin lattice

2004 ◽  
Vol 70 (9) ◽  
Author(s):  
Mohamad Al Hajj ◽  
Nathalie Guihéry ◽  
Jean-Paul Malrieu ◽  
Peter Wind
Keyword(s):  
Phase Transition ◽  
Theoretical Studies ◽  
Two Dimensional ◽  
Spin Lattice

The sp2 character of new two-dimensional AsB with tunable electronic properties predicted by theoretical studies

2019 ◽  
Vol 21 (37) ◽  
pp. 20981-20987
Author(s):  
Jie Zhang ◽  
Huijun Liu ◽  
Yun Gao ◽  
Xiaohong Xia ◽  
Zhongbing Huang
Keyword(s):  
Electronic Material ◽  
Electronic Properties ◽  
Layer Thickness ◽  
Single Layer ◽  
Theoretical Studies ◽  
Two Dimensional ◽  
Direct Bandgap ◽  
Stacking Order ◽  
Orbital Hybridization

We identify a semiconducting 2D electronic material, single-layer AsB, which has a suitable direct bandgap of 1.18 eV. Its frontiers state is sp2 orbital hybridization, which can be effectively tuned by layer thickness, stacking order and strain.

Theoretical Studies of Electronic and Optical Behaviors of All-Inorganic CsPbI3 and Two-Dimensional MS2 (M = Mo, W) Heterostructures

2019 ◽  
Vol 123 (12) ◽  
pp. 7158-7165 ◽  
Author(s):  
Jian He ◽  
Jie Su ◽  
Zhenhua Lin ◽  
Siyu Zhang ◽  
Yu Qin ◽  
...  
Keyword(s):  
Theoretical Studies ◽  
Two Dimensional

Experimental and Theoretical Studies of Two-Dimensional Fixed-Type Cavities

1975 ◽  
Vol 97 (4) ◽  
pp. 515-521 ◽  
Author(s):  
R. A. Furness ◽  
S. P. Hutton
Keyword(s):  
Potential Flow ◽  
Reasonable Agreement ◽  
Experimental Studies ◽  
Liquid Jet ◽  
Theoretical Studies ◽  
Two Dimensional ◽  
Nozzle Throat ◽  
Jet Behavior ◽  
Fixed Type ◽  
Experimental And Theoretical Studies

Theoretical and experimental studies have been made of the growth and collapse of fixed cavities in a two-dimensional convergent-divergent nozzle. In this particular configuration an important feature was a re-entrant liquid jet which invaded the growing cavity from the downstream end, travelling upstream along the wall and interrupting the cavity when it reached the nozzle throat. A simple two-dimensional unsteady potential flow theory, developed to model the cycle, gave reasonable agreement with cinephotography and predicted the jet behavior. Because vaporization was neglected the theory overestimated the speed of the cycle.

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