Thermal stability of static coronal loops. I - Effects of boundary conditions

1985 ◽  
Vol 298 ◽  
pp. 876 ◽  
Author(s):  
S. K. Antiochos ◽  
E. C. Shoub ◽  
C.-H. An ◽  
A. G. Emslie
Keyword(s):  
Thermal Stability ◽  
Boundary Conditions ◽  
Coronal Loops ◽  
Thermal Stability Of

scholarly journals A Thermal Catastrophe in a Resonantly Heated Coronal Loop

1983 ◽  
Vol 102 ◽  
pp. 397-400
Author(s):  
P.C.H. Martens ◽  
M. Kuperus
Keyword(s):  
Magnetic Field ◽  
Thermal Stability ◽  
Coronal Loop ◽  
Coronal Loops ◽  
Natural Explanation ◽  
X Ray ◽  
Magnetic Field Topology ◽  
Coronal Rain ◽  
The Magnetic Field ◽  
Thermal Stability Of

A theory for the thermal stability of hot coronal loops is presented, which is based on the resonant electrodynamic heating theory of Ionson (1982) and the evaporation/condensation scenario of Krall and Antiochos (1980). The theory predicts that gradual changes in the length of a loop or in its magnetic field strength can trigger catastrophic changes in the X-ray visibility of the loop, without the need for a change in the magnetic field topology.A natural explanation is thereby given for the observations of X-ray brightenings in loops and loop evacuations with coronal rain.

Modelling of Quiet Sun Coronal Structures

1994 ◽  
Vol 144 ◽  
pp. 169-176
Author(s):  
S. Serio
Keyword(s):  
Thermal Stability ◽  
Heat Conduction ◽  
Magnetic Fields ◽  
Solar Corona ◽  
Thermal Stratification ◽  
Recent Progress ◽  
Coronal Loops ◽  
Dynamic Heating ◽  
Thermal Stability Of ◽  
Coronal Structures

AbstractThe 1978 paper by Rosner et al. has set the basis for a new way of understanding thermal stratification in the solar corona, taking into account the constraints of magnetic fields on heat conduction. This paper will review recent progress in modelling of coronal loops, and in particular the effects of deviations from Spitzer conductivity, stationary siphon flows and shocks, thermal stability of the transition region, and possible diagnostics of dynamic heating of the coronal plasma.

Use of Bake Hardening Effects to Change Local Properties of Constructional Elements

2007 ◽  
Vol 22 ◽  
pp. 17-26 ◽  
Author(s):  
Heinz Palkowski ◽  
Anna Brück
Keyword(s):  
Heat Treatment ◽  
Thermal Stability ◽  
Boundary Conditions ◽  
Structural Components ◽  
Bake Hardening ◽  
Deformation Path ◽  
Local Properties ◽  
Characteristic Values ◽  
Thermal Stability Of ◽  
Multiphase Steels

Within subproject A2 processes leading to local Bake Hardening (BH) effects in multiphase steels will be investigated. The characteristic values which integrally describe the Bake Hardening effect depend on the deformation path and the degree of preforming, as well as on temperature and duration of the subsequent heat treatment. The thermal stability of the induced strengthening is also determined, in order to specify the boundary conditions for thermal assembling. Thus, they can be qualified for the assembly of locally strengthened structural components.

The thermal stability of coronal loops numerical simulations

Solar Physics ◽  
1991 ◽  
Vol 132 (1) ◽  
pp. 95-108 ◽  
Author(s):  
Y. Mok ◽  
D. D. Schnack ◽  
G. Van Hoven
Keyword(s):  
Thermal Stability ◽  
Numerical Simulations ◽  
Coronal Loops ◽  
Thermal Stability Of

The Ordered Phase Formation in Ti-Al-Ga Alloys

1970 ◽  
Vol 28 ◽  
pp. 440-441
Author(s):  
Shiro Fujishiro ◽  
Harold L. Gegel
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Titanium Alloys ◽  
Growth Kinetics ◽  
Stoichiometric Composition ◽  
Good Potential ◽  
Alpha Titanium ◽  
Cold Rolled ◽  
Kinetics Of ◽  
Thermal Stability Of

Ordered-alpha titanium alloys having a DO19 type structure have good potential for high temperature (600°C) applications, due to the thermal stability of the ordered phase and the inherent resistance to recrystallization of these alloys. Five different Ti-Al-Ga alloys consisting of equal atomic percents of aluminum and gallium solute additions up to the stoichiometric composition, Ti3(Al, Ga), were used to study the growth kinetics of the ordered phase and the nature of its interface.The alloys were homogenized in the beta region in a vacuum of about 5×10-7 torr, furnace cooled; reheated in air to 50°C below the alpha transus for hot working. The alloys were subsequently acid cleaned, annealed in vacuo, and cold rolled to about. 050 inch prior to additional homogenization

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