Heat flow model of glass formation and crystallization on rapid quenching

1986 ◽  
Vol 34 (5) ◽  
pp. 831-837 ◽  
Author(s):  
R. Sellger ◽  
W. Löser
Keyword(s):  
Heat Flow ◽  
Glass Formation ◽  
Flow Model ◽  
Rapid Quenching ◽  
Heat Flow Model

scholarly journals Heat flow model for pulsed laser melting and rapid solidification of ion implanted GaAs

2010 ◽  
Vol 108 (1) ◽  
pp. 013508 ◽  
Author(s):  
Taeseok Kim ◽  
Manoj R. Pillai ◽  
Michael J. Aziz ◽  
Michael A. Scarpulla ◽  
Oscar D. Dubon ◽  
...  
Keyword(s):  
Heat Flow ◽  
Rapid Solidification ◽  
Flow Model ◽  
Pulsed Laser ◽  
Laser Melting ◽  
Heat Flow Model ◽  
Ion Implanted

Cold-specific feeding response of rats to cold exposure and energy density of body weight change

1981 ◽  
Vol 51 (2) ◽  
pp. 327-334 ◽  
Author(s):  
S. D. Morrison
Keyword(s):  
Body Weight ◽  
Food Intake ◽  
Energy Density ◽  
Heat Flow ◽  
Cold Exposure ◽  
Weight Change ◽  
Flow Model ◽  
Energy Yield ◽  
Body Weight Change ◽  
Heat Flow Model

The increased food intake of rats exposed to cold is the result of increased intake due to cold (cold-specific compartment; A) and decreased intake due to simultaneously decreased body weight (weight-specific compartment; B). The two compartments are evaluated at 5, 13, and 17 degrees C. B is evaluated as the food intake of theoretical, isogravimetric control (identical to cold-exposed rats with respect to body weight and rate of change of body weight and identical to nonexposed rats in all other respects) that takes into account both the change in energy expenditure due to decreased body weight and the energy yield from tissue catabolism represented by change of body weight. A is the observed food intake minus B. A theoretical heat-flow model, in which expected changes in heat flow during cold exposure drive food intake to maintain or restore preexposure body weight status, corroborated the partition derived from experimental data. However, both the experimental results and the heat-flow model imply that the energy density of body weight change is negatively correlated with rate of body weight change. The energy density of weight change is high with high rates of weight loss and low with high rats of weight gain.

scholarly journals CONTROL OF CONTINUOUS RHEOCASTING PROCESS USING HEAT FLOW MODEL

1986 ◽  
Vol 2 (2) ◽  
pp. 157-170
Author(s):  
Abdel-Wahed Assar ◽  
Nahed El-Mahallawy ◽  
Mohamed Taha ◽  
Ahmed El-Sabbagh
Keyword(s):  
Heat Flow ◽  
Flow Model ◽  
Heat Flow Model

scholarly journals A parametric heat flow model in the spherical earth

2019 ◽  
Vol 4 (3) ◽  
pp. 125-127
Author(s):  
Frederick Mayer ◽  
John Reitz
Keyword(s):  
Heat Flow ◽  
Flow Model ◽  
Spherical Earth ◽  
Heat Flow Model

Pulsed Beams and Ion-Beam Mixing: Metal-Si and Metalmetal Structures

1981 ◽  
Vol 7 ◽  
Author(s):  
J. W. Mayer ◽  
R. Fastow ◽  
G. Galvin ◽  
L. S. Hung ◽  
M. Nastasi ◽  
...  
Keyword(s):  
Heat Flow ◽  
Energy Deposition ◽  
Flow Model ◽  
Ion Beam ◽  
Interface Velocity ◽  
Ion Beam Mixing ◽  
Temperature Distributions ◽  
Superlattice Structures ◽  
Heat Flow Model ◽  
Polycrystalline Structures

ABSTRACTEnergy deposition and heat-flow determine the temperature distributions in pulsed-beam irradiated structures. In laser irradiated Si, transient conductance measurements indicated a liquid/solid interface velocity of 2.8 m/sec during crystallization in agreement with a heat flow model. With pulsed ionbeam annealing of metal-Si structures, melting starts at the interface; epitaxial NiSi2 layers have been formed. Ion-beammixing experiments on polycrystalline and epitaxial Au-Ag bilayers show that intermixing is more pronounced in the polycrystalline structures as is the case with thermal annealing. Superlattice structures are formed in the epitaxial structures.

scholarly journals On oscillatory convection with the Cattaneo–Christov hyperbolic heat-flow model

2015 ◽  
Vol 471 (2175) ◽  
pp. 20140845 ◽  
Author(s):  
J. J. Bissell
Keyword(s):  
Heat Flow ◽  
Flow Model ◽  
Threshold Value ◽  
Free Boundaries ◽  
Oscillatory Convection ◽  
Heat Flow Model ◽  
Boussinesq Fluid ◽  
Fixed Boundaries ◽  
Analytical Approaches ◽  
Rayleigh Numbers

Adoption of the hyperbolic Cattaneo–Christov heat-flow model in place of the more usual parabolic Fourier law is shown to raise the possibility of oscillatory convection in the classic Bénard problem of a Boussinesq fluid heated from below. By comparing the critical Rayleigh numbers for stationary and oscillatory convection, R c and R S respectively, oscillatory convection is found to represent the preferred form of instability whenever the Cattaneo number C exceeds a threshold value C T ≥8/27 π 2 ≈0.03. In the case of free boundaries, analytical approaches permit direct treatment of the role played by the Prandtl number P 1 , which—in contrast to the classical stationary scenario—can impact on oscillatory modes significantly owing to the non-zero frequency of convection. Numerical investigation indicates that the behaviour found analytically for free boundaries applies in a qualitatively similar fashion for fixed boundaries, while the threshold Cattaneo number C T is computed as a function of P 1 ∈ [ 10 − 2 , 10 + 2 ] for both boundary regimes.

Sign in / Sign up

Export Citation Format

Share Document