scholarly journals Polytropic index of magnetosheath ions based on homogeneous MHD Bernoulli Integral

2016 ◽  
Vol 121 (3) ◽  
pp. 2349-2359 ◽  
Author(s):  
Xuexia Pang ◽  
Jinbin Cao ◽  
Yuduan Ma
Keyword(s):  
Polytropic Index ◽  
Bernoulli Integral

scholarly journals Polytropic Index of the Solar Wind Ions Near the Earth Calculated Using a Homogeneous Magnetohydrodynamic Bernoulli Integral

2020 ◽  
Vol 904 (2) ◽  
pp. 167
Author(s):  
Xuexia Pang ◽  
Feida Wang ◽  
Xiyao Geng ◽  
Xin Wang ◽  
Zechao Deng ◽  
...  
Keyword(s):  
Solar Wind ◽  
Polytropic Index ◽  
The Earth ◽  
Bernoulli Integral

scholarly journals Polytropic index of central plasma sheet ions based on MHD Bernoulli integral

2015 ◽  
Vol 120 (6) ◽  
pp. 4736-4747 ◽  
Author(s):  
Xuexia Pang ◽  
Jinbin Cao ◽  
Wenlong Liu ◽  
Yuduan Ma ◽  
Haoyu Lu ◽  
...  
Keyword(s):  
Plasma Sheet ◽  
Polytropic Index ◽  
Central Plasma ◽  
Central Plasma Sheet ◽  
Bernoulli Integral

scholarly journals Significance of Bernoulli Integral Terms for the Solar Wind Protons at 1 au

2021 ◽  
Vol 11 (10) ◽  
pp. 4643
Author(s):  
Georgios Nicolaou ◽  
George Livadiotis ◽  
Mihir I. Desai
Keyword(s):  
Magnetic Field ◽  
Solar Wind ◽  
Energy Conservation ◽  
Plasma Density ◽  
Polytropic Index ◽  
Field Observations ◽  
Accurate Calculation ◽  
Solar Wind Proton ◽  
Wind Spacecraft ◽  
Bernoulli Integral

The Bernoulli integral describes the energy conservation of a fluid along specific streamlines. The integral is the sum of individual terms that contain the plasma density, speed, temperature, and magnetic field. Typical solar wind analyses use the fluctuations of the Bernoulli integral as a criterion to identify different plasma streamlines from single spacecraft observations. However, the accurate calculation of the Bernoulli integral requires accurately determining the plasma polytropic index from the analysis of density and temperature observations. To avoid this complexity, we can simplify the calculations by keeping only the dominant terms of the integral. Here, we analyze proton plasma and magnetic field observations obtained by the Wind spacecraft at 1 au, during 1995. We calculate the Bernoulli integral terms and quantify their significance by comparing them with each other. We discuss potential simplifications of the calculations in the context of determining solar wind proton thermodynamics using single spacecraft observations.

Long-Term Variability of the Polytropic Index of Solar Wind Protons at 1 AU

Solar Physics ◽  
2013 ◽  
Vol 289 (4) ◽  
pp. 1371-1378 ◽  
Author(s):  
G. Nicolaou ◽  
G. Livadiotis ◽  
X. Moussas
Keyword(s):  
Solar Wind ◽  
Polytropic Index

Rapidly rotating spheroids of polytropic index N = 1

1977 ◽  
Vol 211 ◽  
pp. 568 ◽  
Author(s):  
C. T. Cunningham
Keyword(s):  
Polytropic Index

scholarly journals Impact of generalized polytropic equation of state on charged anisotropic polytropes

2020 ◽  
Vol 80 (2) ◽  
Author(s):  
S. A. Mardan ◽  
M. Rehman ◽  
I. Noureen ◽  
R. N. Jamil
Keyword(s):  
Equation Of State ◽  
Speed Of Sound ◽  
Graphical Analysis ◽  
Maxwell Field ◽  
Anisotropic Fluid ◽  
Polytropic Index ◽  
Model Parameters ◽  
Field Equations ◽  
Polytropic Equation ◽  
Fluid Configuration

Abstract In this paper, generalized polytropic equation of state is used to get new classes of polytropic models from the solution of Einstein-Maxwell field equations for charged anisotropic fluid configuration. The models are developed for different values of polytropic index $$n=1,~\frac{1}{2},~2$$n=1,12,2. Masses and radii of eight different stars have been regained with the help of developed models. The speed of sound technique and graphical analysis of model parameters is used for the viability of developed models. The analysis of models indicates they are well behaved and physically viable.

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