scholarly journals On a System of Nonlinear PDEs with Temperature-Dependent Hysteresis in One-Dimensional Thermoplasticity

1997 ◽  
Vol 209 (1) ◽  
pp. 25-46 ◽  
Author(s):  
Pavel Krejčı́ ◽  
Jürgen Sprekels
Keyword(s):  
Nonlinear Pdes ◽  
Temperature Dependent ◽  
One Dimensional

Theory of ultrasonic attenuation in one and two dimensional metals

1976 ◽  
Vol 54 (14) ◽  
pp. 1454-1460 ◽  
Author(s):  
T. Tiedje ◽  
R. R. Haering
Keyword(s):  
Ultrasonic Attenuation ◽  
Three Dimensional ◽  
Electronic Systems ◽  
Two Dimensional ◽  
Temperature Dependent ◽  
One Dimensional ◽  
The Difference

The theory of ultrasonic attenuation in metals is extended so that it applies to quasi one and two dimensional electronic systems. It is shown that the attenuation in such systems differs significantly from the well-known results for three dimensional systems. The difference is particularly marked for one dimensional systems, for which the attenuation is shown to be strongly temperature dependent.

Temperature-Dependent Luminescence Quenching in Random Nano Porous Media

2004 ◽  
Author(s):  
Xiulin Ruan ◽  
Massoud Kaviany
Keyword(s):  
Porous Media ◽  
Thermal Emission ◽  
Luminescence Quenching ◽  
Photon Absorption ◽  
Temperature Dependent ◽  
One Dimensional ◽  
Irradiation Intensity ◽  
Enhanced Absorption ◽  
Coherent Wave ◽  
Transport Transition

The luminescence quenching of a random, crystalline one-dimensional model porous medium doped with rare-earth elements, is analyzed by considering the transport, transition, and interaction of the fundamental energy carriers. The quenching in nano porous media is enhanced compared to a single crystal, due to multiple scattering, enhanced absorption, and low thermal conductivity. The coherent wave treatment is used to calculate the photon absorption, in order to allow for field interference and enhancement. The luminescent and thermal emission is considered as incoherent. The luminescence quenching and non-linear thermal emission, occurring with increasing irradiation intensity, are predicted.

One-dimensional viscous radiative gas with temperature dependent viscosity

2018 ◽  
Vol 38 (5) ◽  
pp. 1515-1548 ◽  
Author(s):  
Lin HE ◽  
Yongkai LIAO ◽  
Tao WANG ◽  
Huijiang ZHAO
Keyword(s):  
Temperature Dependent ◽  
Temperature Dependent Viscosity ◽  
One Dimensional ◽  
Dependent Viscosity

Numerical Investigation on Transient Conjugate Optical-Thermal Fields in Thin Films Irradiated by Moving Sources for Front Treatments

2010 ◽  
Vol 297-301 ◽  
pp. 1439-1444
Author(s):  
Nicola Bianco ◽  
Oronzio Manca ◽  
Daniele Ricci
Keyword(s):  
Thin Film ◽  
Maxwell Equations ◽  
Film Structure ◽  
Laser Source ◽  
Transient Temperature ◽  
Temperature Profiles ◽  
Temperature Dependent ◽  
Motion Direction ◽  
One Dimensional ◽  
Thermal Fields

In this paper a numerical analysis on two-dimensional transient of the combined optical-thermal fields caused by a moving Gaussian laser source in a multilayer thin film structure on a glass substrate is carried out. The workpiece is considered semi-infinite along the motion direction and its optical and thermophysical properties are assumed temperature dependent. The COMSOL Multiphysics 3.4 code has been used to solve the combined thermal and electromagnetic problem. In this way, the optical field is considered locally one-dimensional and Maxwell equations are solved in order to evaluate the absorption in thin film. Results, in terms of transient temperature profiles and fields, are presented for different Peclet numbers and thin film thicknesses.

scholarly journals Temperature-dependent structural change of 1D ice, water nanopipe, in crystal

2014 ◽  
Vol 70 (a1) ◽  
pp. C565-C565
Author(s):  
Akio Wakahara ◽  
Yasuko In
Keyword(s):  
Structural Change ◽  
Water Molecules ◽  
Fold Axis ◽  
X Ray Diffraction ◽  
Temperature Dependent ◽  
Crystal Axis ◽  
One Dimensional ◽  
X Ray ◽  
Ice Water ◽  
Cluster Unit

One-dimensional ice (1D ice) is formed in the single crystal prepared by mixing tryptophan and pyridoxal-5-phosphate in aqueous solution. This ice (diameter=1.649nm at 90K) consists of a hollow-type nanowire, viz., water nanopipe, and the structure is constructed by piling up the cluster unit of 15 water molecules, five independent waters (W1,--W5) of which are arranged around a 3-fold axis. As can be seen from the side view of this nanopipe, a tape structure is made of the continuous chair-type six-membered rings running parallel to the longest crystal axis, and its three tapes arranged around 3-fold axis are linked together via two kinds of hydrogen bonds of W5 (W5-W2 and W5-W4). Thus, the overall structure of this 1D ice could be described as three-square nanometric column. In order to investigate the temperature-dependent structural change of 1D ice, the crystal structure was refined using the X-ray diffraction data measured at different temperature between 90K and 293K. From these results, it was confirmed that the nanopipe structure is stable under 200K, but W5 and W4 disappear at 220K and 273K, respectively, indicating the importance of W5 for the structural stability of 1D ice.

A Simulation of the Liquid Shock and Cavitation Based on a Multi-Equation Model

2016 ◽  
Vol 13 (04) ◽  
pp. 1641010
Author(s):  
Yang-Yao Niu
Keyword(s):  
Equation Of State ◽  
Blunt Body ◽  
Equation Model ◽  
Test Cases ◽  
Riemann Solver ◽  
Temperature Dependent ◽  
Two Phase ◽  
One Dimensional ◽  
Condensation Shock ◽  
Multi Phase

In this paper, an unsteady preconditioning formulation for multi-phase flows with arbitrary equation of state based on the approximated Riemann solver is developed for multi-phase flows at all speed. This paper considers a homogeneous two-phase multi-equation mixture model with the assumption of kinematics and thermodynamics equilibriums. The thermodynamics behaviors of liquid phase, vapor phase and their phase transitional process are described by a temperature-dependent hybrid equation of state. Benchmark test cases, including one-dimensional (1D) condensation shock in the cavitated nozzle and two-dimensional (2D) cavitated blunt body problem, demonstrate accurate capturing of interfaces, shock waves and cavitation zones.

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