scholarly journals An equatorial solar wind model with angular momentum conservation and nonradial magnetic fields and flow velocities at an inner boundary

2016 ◽  
Vol 121 (6) ◽  
pp. 4966-4984 ◽  
Author(s):  
S. Tasnim ◽  
Iver H. Cairns
Keyword(s):  
Solar Wind ◽  
Angular Momentum ◽  
Magnetic Fields ◽  
Momentum Conservation ◽  
Wind Model ◽  
Angular Momentum Conservation ◽  
Solar Wind Model ◽  
Flow Velocities

scholarly journals Parker’s Solar Wind Model for a Polytropic Gas

Entropy ◽  
2021 ◽  
Vol 23 (11) ◽  
pp. 1497
Author(s):  
Bhimsen Shivamoggi ◽  
David Rollins ◽  
Leos Pohl
Keyword(s):  
Solar Wind ◽  
Angular Momentum ◽  
Kinetic Energy ◽  
Thermal Energy ◽  
Gas Flow ◽  
Wind Model ◽  
Theoretical Formulation ◽  
Polytropic Gas ◽  
Solar Wind Model ◽  
Theoretical Considerations

Parker’s hydrodynamic isothermal solar wind model is extended to apply for a more realistic polytropic gas flow that can be caused by a variable extended heating of the corona. A compatible theoretical formulation is given and detailed numerical and systematic asymptotic theoretical considerations are presented. The polytropic conditions favor an enhanced conversion of thermal energy in the solar wind into kinetic energy of the outward flow and are hence shown to enhance the acceleration of the solar wind, thus indicating a quicker loss of the solar angular momentum.

Conservation laws

2018 ◽  
Author(s):  
Nathalie Deruelle ◽  
Jean-Philippe Uzan
Keyword(s):  
Dynamical System ◽  
Angular Momentum ◽  
Conservation Laws ◽  
Total Energy ◽  
Superposition Principle ◽  
Momentum Conservation ◽  
Conserved Quantities ◽  
Angular Momentum Conservation ◽  
Third Law ◽  
The Law

This chapter defines the conserved quantities associated with an isolated dynamical system, that is, the quantities which remain constant during the motion of the system. The law of momentum conservation follows directly from Newton’s third law. The superposition principle for forces allows Newton’s law of motion for a body Pa acted on by other bodies Pa′ in an inertial Cartesian frame S. The law of angular momentum conservation holds if the forces acting on the elements of the system depend only on the separation of the elements. Finally, the conservation of total energy requires in addition that the forces be derivable from a potential.

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