Numerical Modeling of the Physical Mechanism of Anomalous Heating of the Solar Atmosphere

The development of the physics of the solar atmosphere during the last 50 years has been greatly influenced by the increasing capability of observations made from space. Access to images and spectra of the hotter plasma in the UV, XUV and X-ray regions provided a major advance over the few coronal forbidden lines seen in the visible and enabled the cooler chromospheric and photospheric plasma to be seen in its proper perspective, as part of a total system. In this way space observations have stimulated new and important advances, not only in space but also in ground-based observations and theoretical modelling, so that today we find a well-balanced harmony between the three techniques.

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Influence of Magnetic Fields on Solar Hydrodynamics: Experimental Results

International Astronomical Union Colloquium ◽

10.1017/s025292110005329x ◽

1977 ◽

Vol 36 ◽

pp. 143-180 ◽

Cited By ~ 10

Author(s):

J.O. Stenflo

Keyword(s):

Solar Activity ◽

Energy Balance ◽

Magnetic Fields ◽

Solar Atmosphere ◽

General Problem ◽

Solar Rotation ◽

Active Regions ◽

Physical Conditions ◽

Dynamic Phenomena

It is well-known that solar activity is basically caused by the Interaction of magnetic fields with convection and solar rotation, resulting in a great variety of dynamic phenomena, like flares, surges, sunspots, prominences, etc. Many conferences have been devoted to solar activity, including the role of magnetic fields. Similar attention has not been paid to the role of magnetic fields for the overall dynamics and energy balance of the solar atmosphere, related to the general problem of chromospheric and coronal heating. To penetrate this problem we have to focus our attention more on the physical conditions in the ‘quiet’ regions than on the conspicuous phenomena in active regions.

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Prediction of LPCVD silicon film microstructure from local operating conditions using numerical modeling

Journal de Physique IV (Proceedings) ◽

10.1051/jp4:1999822 ◽

1999 ◽

Vol 09 (PR8) ◽

pp. Pr8-181-Pr8-188 ◽

Cited By ~ 1

Author(s):

A. Dollet ◽

B. Caussat ◽

J. P. Couderc

Keyword(s):

Numerical Modeling ◽

Silicon Film ◽

Operating Conditions ◽

Film Microstructure

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Investigation of Morphosedimentary Processes on a Schematic Louisiana Barrier Island Using Process-Based Numerical Modeling

Coastal Sediments '07 ◽

10.1061/40926(239)51 ◽

2007 ◽

Author(s):

T. Campbell ◽

B. de Sonneville ◽

L. Benedet ◽

D. J. W. Walstra ◽

C. W. Finkl

Keyword(s):

Numerical Modeling ◽

Barrier Island

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Numerical Modeling of Hurricane-Induced Extreme Wave Heights in Pensacola Bay

Coastal Hazards ◽

10.1061/9780784412664.007 ◽

2013 ◽

Author(s):

Wenrui Huang ◽

Yuan He ◽

Shuguang Liu

Keyword(s):

Numerical Modeling ◽

Extreme Wave ◽

Wave Heights

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SIMULATION OF ELECTRICAL MONITORING OF DAMS WITH LEAKAGE WITH A TRANSVERSE PLACEMENT OF THE MEASURING INSTALLATION

Eurasian Journal of Mathematical and Computer Applications ◽

10.32523/2306-6172-2020-8-4-69-82 ◽

2020 ◽

Vol 8 (4) ◽

pp. 69-82

Author(s):

D.S. Rakisheva ◽

◽

B.G. Mukanova ◽

I.N. Modin ◽

◽

...

Keyword(s):

Numerical Modeling ◽

Water Level ◽

Electrical Resistivity Tomography ◽

Resistivity Tomography ◽

Measuring Installation ◽

Basic Functions ◽

Tomography Method ◽

Dam Monitoring ◽

The Mathematical Model ◽

Measurement Line

Numerical modeling of the problem of dam monitoring by the Electrical Resistivity Tomography method is carried out. The mathematical model is based on integral equations with a partial Fourier transform with respect to one spatial variable. It is assumed that the measurement line is located across the dam longitude. To approximate the shape of the dam surface, the Radial Basic Functions method is applied. The influence of locations of the water-dam, dam-basement, basement-leakage boundaries with respect to the sounding installation, which is partially placed under the headwater, is studied. Numerical modeling is carried out for the following varied parameters: 1) water level at the headwater; 2) the height of the leak; 3) the depth of the leak; 4) position of the supply electrode; 5) water level and leaks positions are changing simultaneously. Modeling results are presented in the form of apparent resistivity curves, as it is customary in geophysical practice.

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Time Dependances of the Resistance Coefficients of Polymeric Materials

INEOS OPEN ◽

10.32931/io2016a ◽

2020 ◽

Vol 3 ◽

Author(s):

A. V. Matseevich ◽

◽

A. A. Askadskii ◽

Keyword(s):

Time Dependence ◽

Physical Mechanism ◽

Polymeric Materials ◽

Resistance Coefficient ◽

Constant Stress ◽

Time To Rupture ◽

Structure Sensitive ◽

Material Durability ◽

Resistance Coefficients ◽

Extremal Character

One of the possible approaches to the analysis of a physical mechanism of time dependence for the resistance coefficients of materials is suggested. The material durability at the constant stress is described using the Zhurkov and Gul' equations and the durability at the alternating stress—using the Bailey criterion. The low strains lead to structuring of a material that is reflected in a reduction of the structure-sensitive coefficient in these equations. This affords 20% increase in the durability. The dependence of the resistance coefficient assumes an extremal character; the maximum is observed at the time to rupture lg tr ≈ 2 (s).

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