Nonlinear dynamics of small-scale magnetic islands in high temperature plasmas

2001 ◽  
Vol 8 (5) ◽  
pp. 1929-1934 ◽  
Author(s):  
Richard D. Sydora
Keyword(s):  
Nonlinear Dynamics ◽  
High Temperature ◽  
Small Scale ◽  
Magnetic Islands

scholarly journals Non-Extensive Statistical Analysis of Energetic Particle Flux Enhancements Caused by the Interplanetary Coronal Mass Ejection-Heliospheric Current Sheet Interaction

Entropy ◽  
2019 ◽  
Vol 21 (7) ◽  
pp. 648 ◽  
Author(s):  
Pavlos ◽  
Malandraki ◽  
Khabarova ◽  
Karakatsanis ◽  
Pavlos ◽  
...  
Keyword(s):  
Nonlinear Dynamics ◽  
Equilibrium Phase ◽  
Surrogate Data ◽  
Heliospheric Current Sheet ◽  
Diagnostic Tools ◽  
Small Scale ◽  
Magnetic Islands ◽  
Theoretical Concepts ◽  
Long Range Correlations ◽  
Interplanetary Coronal Mass Ejection

In this study we use theoretical concepts and computational-diagnostic tools of Tsallis non-extensive statistical theory (Tsallis q-triplet: qsen, qrel, qstat), complemented by other known tools of nonlinear dynamics such as Correlation Dimension and surrogate data, Hurst exponent, Flatness coefficient, and p-modeling of multifractality, in order to describe and understand Small-scale Magnetic Islands (SMIs) structures observed in Solar Wind (SW) with a typical size of ~0.01–0.001 AU at 1 AU. Specifically, we analyze ~0.5 MeV energetic ion time-intensity and magnetic field profiles observed by the STEREO A spacecraft during a rare, widely discussed event. Our analysis clearly reveals the non-extensive character of SW space plasmas during the periods of SMIs events, as well as significant physical complex phenomena in accordance with nonlinear dynamics and complexity theory. As our analysis also shows, a non-equilibrium phase transition parallel with self-organization processes, including the reduction of dimensionality and development of long-range correlations in connection with anomalous diffusion and fractional acceleration processes can be observed during SMIs events.

scholarly journals Nonlinear Dynamics of Magnetic Islands Imbedded in Small-Scale Turbulence

2009 ◽  
Vol 103 (14) ◽  
Author(s):  
M. Muraglia ◽  
O. Agullo ◽  
S. Benkadda ◽  
X. Garbet ◽  
P. Beyer ◽  
...  
Keyword(s):  
Nonlinear Dynamics ◽  
Small Scale ◽  
Magnetic Islands ◽  
Scale Turbulence

Non-Extensive Statistical Analysis of Energetic Particle Flux Enhancements Caused by the Interplanetary Coronal Mass Ejection-Heliospheric Current Sheet Interaction

2020 ◽  
Author(s):  
Evgenios Pavlos ◽  
Olga Malandraki ◽  
Olga Khabarova ◽  
Leonidas P. Karakatsanis ◽  
George P. Pavlos ◽  
...  
Keyword(s):  
Nonlinear Dynamics ◽  
Equilibrium Phase ◽  
Surrogate Data ◽  
Heliospheric Current Sheet ◽  
Diagnostic Tools ◽  
Small Scale ◽  
Magnetic Islands ◽  
Theoretical Concepts ◽  
Long Range Correlations ◽  
Interplanetary Coronal Mass Ejection

<p>In this study we use theoretical concepts and computational-diagnostic tools of Tsallis non-extensive statistical theory (Tsallis q-triplet: qsen, qrel, qstat), complemented by other known tools of nonlinear dynamics such as Correlation Dimension and surrogate data, Hurst exponent, Flatness coefficient, and p-modeling of multifractality, in order to describe and understand Small-scale Magnetic Islands (SMIs) structures observed in Solar Wind (SW) with a typical size of ~0.01–0.001 AU at 1 AU. Specifically, we analyze ~0.5 MeV energetic ion time-intensity and magnetic field profiles observed by the STEREO A spacecraft during a rare, widely discussed event. Our analysis clearly reveals the non-extensive character of SW space plasmas during the periods of SMIs events, as well as significant physical complex phenomena in accordance with nonlinear dynamics and complexity theory. As our analysis also shows, a non-equilibrium phase transition parallel with self-organization processes, including the reduction of dimensionality and development of long-range correlations in connection with anomalous discussion and fractional acceleration processes can be observed during SMIs events.</p>

scholarly journals Mechanical Properties of Spruce Wood Extracted from GLT Beams Loaded by Fire

2021 ◽  
Vol 13 (10) ◽  
pp. 5494
Author(s):  
Lucie Kucíková ◽  
Michal Šejnoha ◽  
Tomáš Janda ◽  
Jan Sýkora ◽  
Pavel Padevět ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Cross Section ◽  
Negative Impact ◽  
Tensile Tests ◽  
Thermal Recovery ◽  
Bending Test ◽  
Small Scale ◽  
Spruce Wood ◽  
The Impact

Heating wood to high temperature changes either temporarily or permanently its physical properties. This issue is addressed in the present contribution by examining the effect of high temperature on residual mechanical properties of spruce wood, grounding on the results of full-scale fire tests performed on GLT beams. Given these tests, a computational model was developed to provide through-thickness temperature profiles allowing for the estimation of a charring depth on the one hand and on the other hand assigning a particular temperature to each specimen used subsequently in small-scale tensile tests. The measured Young’s moduli and tensile strengths were accompanied by the results from three-point bending test carried out on two groups of beams exposed to fire of a variable duration and differing in the width of the cross-section, b=100 mm (Group 1) and b=160 mm (Group 2). As expected, increasing the fire duration and reducing the initial beam cross-section reduces the residual bending strength. A negative impact of high temperature on residual strength has also been observed from simple tensile tests, although limited to a very narrow layer adjacent to the charring front not even exceeding a typically adopted value of the zero-strength layer d0=7 mm. On the contrary, the impact on stiffness is relatively mild supporting the thermal recovery property of wood.

Dynamic Modelling of Small Scale and High Temperature ORC System Using Simulink and CoolProp

2021 ◽  
Author(s):  
Radheesh Dhanasegaran ◽  
Antti Uusitalo ◽  
Teemu Turunen-Saaresti
Keyword(s):  
High Temperature ◽  
Dynamic Modelling ◽  
Small Scale

scholarly journals High temperature mechanical deformation of an additive manufactured nickel based superalloy using small scale test methods

2018 ◽  
Vol 1 (S1) ◽  
pp. 21
Author(s):  
H. Hilal ◽  
R.J. Lancaster ◽  
S.P. Jeffs ◽  
L. Ednie ◽  
J. Boswell ◽  
...  
Keyword(s):  
High Temperature ◽  
Mechanical Deformation ◽  
Test Methods ◽  
Small Scale ◽  
Nickel Based Superalloy ◽  
Scale Test
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