scholarly journals The Role of Non-Equilibrium Processes in Galaxy Clusters

2010 ◽  
Author(s):  
Ka-Wah Wong
Keyword(s):  
Galaxy Clusters ◽  
Equilibrium Processes ◽  
Non Equilibrium

Self-Propagating High-Temperature Synthesis: Non-Equilibrium Processes and Equilibrium Products

2006 ◽  
Vol 45 ◽  
pp. 36-44 ◽  
Author(s):  
A.G. Merzhanov
Keyword(s):  
Wave Propagation ◽  
High Temperature ◽  
Structure Formation ◽  
Front Propagation ◽  
Combustion Time ◽  
Temperature Synthesis ◽  
Equilibrium Processes ◽  
High Temperature Synthesis ◽  
Non Equilibrium

The nature of SHS process was studied, and conditions under which equilibrium and non-equilibrium regimes take place for wave propagation and structure formation of SHS products are under consideration. The important role of cooling down time is shown. Depending on its magnitude, either autoannealing or autoquenching processes can take place in the products after combustion front propagation. The correlation between transition from non-equilibrium to equilibrium state of the product with prolongation of cooling time was examined as well as character of products and processes was indicated in dependence on relationship between the characteristic times of combustion, time of cooling down, and structure formation in SHS product.

Ion-Molecular Memory Model. The Problem of Entropy

2015 ◽  
Vol 22 (4) ◽  
pp. 144-152
Author(s):  
Герасимов ◽  
I. Gerasimov ◽  
Яшин ◽  
A. Yashin
Keyword(s):  
Memory Model ◽  
Human Organism ◽  
Molecular Memory ◽  
Thermodynamic Entropy ◽  
Equilibrium Processes ◽  
Entropy Factor ◽  
Role Of Information ◽  
Thermodynamic Processes ◽  
Non Equilibrium

The final article in a series of works on creation of ion‐molecular models of memory is dedicated to the entropy factor. The authors examine the correlation between information and entropy. They introduce an entropy equivalent in the specificity of memory (by I. Prigozhin). The memory system is considered markedly nonlinear and non‐equilibrium. The article contains a general conclusion to the series of works. The entropy factor is, from the position of bio‐physic‐chemistry, an important aspect of memory, as a higher form of functioning of the organism, including human organism ‐ in the first place. It is possible to allocate to factor the actual memory several types of entropy, instead of one integrated, as for example in the case of the classical thermodynamic processes. Moreover, the thermodynamic entropy, as a defining static processes, virtually ignored in ion‐molecular memory model (Boltzmann entropy). Here more significant is the consideration of the role of information Shannonʹs entropy. And another important point: to evaluate the entropy of systems with non‐equilibrium processes, which undoubtedly applies to the memory, I. Prigozhin proposed to use the sum of the elements of the correlation matrix, the diagonal members which are set in accordance with probability, and extra diagonal ‐ correlations. The authors use it in the estimation of entropic characteristics of ion‐molecular memory model. I.e. on the basis of proposals Prigozhin, the authors introduce entropy equivalent, which corresponds to the provisions of non‐equilibrium thermodynamics and the requirement for orientation changes in two of its components, that allows to estimate the partial contributions of both types of entropy to the total entropy of memory.

Transport Phenomena

2018 ◽  
Author(s):  
Sauro Succi
Keyword(s):  
Distribution Function ◽  
Transport Phenomena ◽  
Transport Coefficients ◽  
Mean Free Path ◽  
Microscopic Scale ◽  
Equilibrium Processes ◽  
Intimate Relation ◽  
Non Equilibrium

The previous Chapter presented a discussion of the notion of local and global equilibria and shown that these equilibria represent the special forms taken by the distribution function once direct and inverse collisions come into balance. This Chapter provides an elementary introduction to transport phenomena and discusses their intimate relation to non-equilibrium processes at the microscopic scale. In particular it shall deal with the connection between the transport coefficients, such as mass, momentum and energy diffusivity with the molecular mean free path, namely the distance traveled by a representative molecules between two subsequent collisions. The discussion also highlights the fundamental role of inhomogeneity in fueling non-equilibrium processes.

Multiplexed Laser Induced Fluorescence and Non-Equilibrium Processes in Arcjets.

1994 ◽  
Author(s):  
Dennis Keefer ◽  
Robert Rhodes ◽  
Trevor Moeller ◽  
David Burtner
Keyword(s):  
Laser Induced Fluorescence ◽  
Equilibrium Processes ◽  
Non Equilibrium

scholarly journals On radial stationary solutions to a model of non-equilibrium growth

2013 ◽  
Vol 24 (3) ◽  
pp. 437-453 ◽  
Author(s):  
CARLOS ESCUDERO ◽  
ROBERT HAKL ◽  
IRENEO PERAL ◽  
PEDRO J. TORRES
Keyword(s):  
Differential Equation ◽  
Partial Differential Equation ◽  
Stationary Solutions ◽  
Parabolic Partial Differential Equation ◽  
Radial Solutions ◽  
Variational Techniques ◽  
Existence And Multiplicity ◽  
Equilibrium Growth ◽  
Non Equilibrium

We present the formal geometric derivation of a non-equilibrium growth model that takes the form of a parabolic partial differential equation. Subsequently, we study its stationary radial solutions by means of variational techniques. Our results depend on the size of a parameter that plays the role of the strength of forcing. For small forcing we prove the existence and multiplicity of solutions to the elliptic problem. We discuss our results in the context of non-equilibrium statistical mechanics.

Additional Non Equilibrium Processes in the Dynamic Interaction between Flux Quanta and Defects

2006 ◽  
Author(s):  
S. Pace ◽  
G. Filatrella ◽  
G. Grimaldi ◽  
A. Nigro ◽  
M. G. Adesso
Keyword(s):  
Dynamic Interaction ◽  
Equilibrium Processes ◽  
Non Equilibrium

Self-Organisation of the Heat Resistant Steel Structure Following Dynamic Non-Equilibrium Processes

2015 ◽  
Vol 220-221 ◽  
pp. 917-921 ◽  
Author(s):  
Mykola Chausov ◽  
Pavlo Maruschak ◽  
Olegas Prentkovskis ◽  
Andriy Pylypenko ◽  
Valentyn Berezin ◽  
...  
Keyword(s):  
Dissipative Structure ◽  
Steel Structure ◽  
Image Correlation ◽  
Experimental Methodology ◽  
Resistant Steel ◽  
Heat Resistant Steel ◽  
Heat Resistant ◽  
Equilibrium Processes ◽  
Equilibrium Process ◽  
Non Equilibrium

Using an original experimental methodology and software for contactless investigation into strains applying the method of digital image correlation, conditions for DNP realization in the test setup with pre-set rigidity have been found. Strain velocities have been determined to be equal to 2...10 s–1 in the processes of forming and developing a dissipative structure of heat resistant steel under the DNP (dynamic non-equilibrium process).

scholarly journals Radicals and Non-Equilibrium Processes in Low-Temperature Plasmas

2007 ◽  
Vol 86 ◽  
pp. 011001 ◽  
Author(s):  
Zoran Petrović ◽  
Nigel Mason ◽  
Satoshi Hamaguchi ◽  
Marija Radmilović-Radjenović
Keyword(s):  
Low Temperature ◽  
Equilibrium Processes ◽  
Low Temperature Plasmas ◽  
Non Equilibrium
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