Kelvin-Helmholtz Instability in a Fluid Layer Bounded Above by a
... flow of liquid and vapour), and in many other processes. The instability of the plane interface between two uniform superposed and streaming fluids through porous medium has been investigated by Sharma and his collaborators [9-11] for different cases of interest. A linear theory of the KHI for paral ...
... flow of liquid and vapour), and in many other processes. The instability of the plane interface between two uniform superposed and streaming fluids through porous medium has been investigated by Sharma and his collaborators [9-11] for different cases of interest. A linear theory of the KHI for paral ...
Energy conservation and Poynting`s theorem
... regarded as consisting essentially of a convergence of electric and magnetic energy from the medium upon the conductor and its transformation there into other forms.”1 This can be shown, for example, in the case of a wire segment of length L and radius r, with voltage drop e carrying a steady ^ inte ...
... regarded as consisting essentially of a convergence of electric and magnetic energy from the medium upon the conductor and its transformation there into other forms.”1 This can be shown, for example, in the case of a wire segment of length L and radius r, with voltage drop e carrying a steady ^ inte ...
SPACE CHARGE & Jets
... jet emerging from a star with an accretion disk around the center. Motion of knots in the jet have been used to estimate an energy of keV for the jet material. On the right is a picture of two jets emerging from a galaxy which has a bright accretion disk imaged by HST. ...
... jet emerging from a star with an accretion disk around the center. Motion of knots in the jet have been used to estimate an energy of keV for the jet material. On the right is a picture of two jets emerging from a galaxy which has a bright accretion disk imaged by HST. ...
Relativistic Limits on Rigidity and Strength
... “strength” or “toughness”. For the linear part of the curve, the slope is given the name of 1/Y , where Y is “Young’s modulus”.1 The Young’s modulus measures a material’s “stiffness” or “rigidity” — if a material were perfectly rigid, it would not stretch for any force, so Y would be infinite. 1 Tho ...
... “strength” or “toughness”. For the linear part of the curve, the slope is given the name of 1/Y , where Y is “Young’s modulus”.1 The Young’s modulus measures a material’s “stiffness” or “rigidity” — if a material were perfectly rigid, it would not stretch for any force, so Y would be infinite. 1 Tho ...
Observation of the Bastille day flare on 2000 July 14
... Solar flare is a great amount of release of magnetic energy which could be up to 6 10 25 joules in tiny time, and meantime it would accelerate particles around the active region into chromospheres, then due to bumps between particles; it would emit electromagnetic wave such as HXR, radio and even ...
... Solar flare is a great amount of release of magnetic energy which could be up to 6 10 25 joules in tiny time, and meantime it would accelerate particles around the active region into chromospheres, then due to bumps between particles; it would emit electromagnetic wave such as HXR, radio and even ...
The force-free magnetosphere of a rotating black hole
... black hole jets are associated with large scale magnetic fields that thread the horizon and/or the ergosphere. A Kerr black hole cannot support such fields in vacuum, therefore, an astrophysical black hole must be surrounded by an accretion disk that holds the magnetic field in place. Without the di ...
... black hole jets are associated with large scale magnetic fields that thread the horizon and/or the ergosphere. A Kerr black hole cannot support such fields in vacuum, therefore, an astrophysical black hole must be surrounded by an accretion disk that holds the magnetic field in place. Without the di ...
Zeeman observations: Measuring magnetic fields in the atomic and
... Within the SKA1 frequency coverage (specially at ν ≥ 1 GHz) there are a number of atomic and molecular transitions with strong Zeeman splitting factors (see presentation by Robishaw et al. at AASKA14). However, in many of them, the Zeeman effect has not yet been detected. The SKA1 sensitivity may al ...
... Within the SKA1 frequency coverage (specially at ν ≥ 1 GHz) there are a number of atomic and molecular transitions with strong Zeeman splitting factors (see presentation by Robishaw et al. at AASKA14). However, in many of them, the Zeeman effect has not yet been detected. The SKA1 sensitivity may al ...
the magnetic field reversal as a to a mechanism of the origin
... therefore, ""'"40'. Considering the averaged out values for the thickness of the layer and of the z distance of the spiral arm, the agreement between the two values of E is rather satisfactory. Extrapolation ol' these results to other galaxies would lead us to expect that in some galaxies spiral arm ...
... therefore, ""'"40'. Considering the averaged out values for the thickness of the layer and of the z distance of the spiral arm, the agreement between the two values of E is rather satisfactory. Extrapolation ol' these results to other galaxies would lead us to expect that in some galaxies spiral arm ...
Fluid Mechanics - 上海交通大学工程力学教学基地
... • The incompressible flow through a pipe, the nature of the flow(laminar and turbulent) is determined by the Reynolds number:the ratio between inertial force and viscous force Re V D / • Incompressible flow through pipe • Laminar flow: Re<2300 • The flow over a semi-infinite flat plate, laminar ...
... • The incompressible flow through a pipe, the nature of the flow(laminar and turbulent) is determined by the Reynolds number:the ratio between inertial force and viscous force Re V D / • Incompressible flow through pipe • Laminar flow: Re<2300 • The flow over a semi-infinite flat plate, laminar ...
Gravitation
... The apple and the Moon The story goes that Isaac Newton deduced the law of gravitation upon seeing an apple fall from a tree. The apple accelerates as it falls. Newton realized that the force accelerating the apple must be coming from the Earth itself. The Moon orbits Earth in a circle. Circular mo ...
... The apple and the Moon The story goes that Isaac Newton deduced the law of gravitation upon seeing an apple fall from a tree. The apple accelerates as it falls. Newton realized that the force accelerating the apple must be coming from the Earth itself. The Moon orbits Earth in a circle. Circular mo ...
Real Properties of Electromagnetic Fields and
... Sun, which is a star, or a rotating molecular cloud at one or both of its ends. Magnetic fields do not have ends. The phrase “magnetic lines of force,” as coined by Faraday, is misleading. The only force that is uniquely associated with a magnetic field is the one that is applied to a compass needle ...
... Sun, which is a star, or a rotating molecular cloud at one or both of its ends. Magnetic fields do not have ends. The phrase “magnetic lines of force,” as coined by Faraday, is misleading. The only force that is uniquely associated with a magnetic field is the one that is applied to a compass needle ...
Solar and Stellar Active Regions
... difference ∆ψ between two adjacent magnetic field vectors, B1 and B2 , is given by ∆ψ = cos−1 [B1 ·B2 /(B1 B2 )]. Assuming a cubic grid, they estimated six different angles at any given location, one for each closest neighbors. The location is considered potentially unstable if at least one ∆ψi > ∆ψ ...
... difference ∆ψ between two adjacent magnetic field vectors, B1 and B2 , is given by ∆ψ = cos−1 [B1 ·B2 /(B1 B2 )]. Assuming a cubic grid, they estimated six different angles at any given location, one for each closest neighbors. The location is considered potentially unstable if at least one ∆ψi > ∆ψ ...
a plane-symmetric magnetized inhomogeneous cosmological model
... Department of Mathematics, Hindu Post-graduate College, Zamania-232 331, Ghazipur, India E-mail: [email protected], [email protected] ...
... Department of Mathematics, Hindu Post-graduate College, Zamania-232 331, Ghazipur, India E-mail: [email protected], [email protected] ...
1. Introduction - The National Academies of Sciences, Engineering
... the high priority of the ATST and its synergism with space missions as essential for solving the questions surrounding solar magnetism and solar activity. With its completion in 2017, strong NSF support will be needed to operate ATST and to exploit its scientific capabilities. ...
... the high priority of the ATST and its synergism with space missions as essential for solving the questions surrounding solar magnetism and solar activity. With its completion in 2017, strong NSF support will be needed to operate ATST and to exploit its scientific capabilities. ...
scholer-shocks
... The sound speed is greater at the peak of the compressional wave where the density is higher than in front or behind of the peak. The peak will catch up with the part of the peak ahead of it, and the wave steepens. The wave steepens until the flow becomes nonadiabatic. Viscous effects become importa ...
... The sound speed is greater at the peak of the compressional wave where the density is higher than in front or behind of the peak. The peak will catch up with the part of the peak ahead of it, and the wave steepens. The wave steepens until the flow becomes nonadiabatic. Viscous effects become importa ...
Spheromaks, solar prominences, and Alfvén instability of current
... Destabilization at a rotational discontinuity in a low β plasma is examined by calculating Alfvén wave behavior using a kinetic description for parallel particle motion and taking into account the presence of the beam of field-aligned electrons with streaming velocity u e0 = J/nq in the current sh ...
... Destabilization at a rotational discontinuity in a low β plasma is examined by calculating Alfvén wave behavior using a kinetic description for parallel particle motion and taking into account the presence of the beam of field-aligned electrons with streaming velocity u e0 = J/nq in the current sh ...
Talk
... 1) Macroscopic scales that organize particle acceleration in solar flares are controlled by the magnetic topology (dipolar, tripolar, quadrupolar), which scales the size of acceleration regions in magnetic reconnection sites and causes sequential local reconnection events that propagate in parallel, ...
... 1) Macroscopic scales that organize particle acceleration in solar flares are controlled by the magnetic topology (dipolar, tripolar, quadrupolar), which scales the size of acceleration regions in magnetic reconnection sites and causes sequential local reconnection events that propagate in parallel, ...
Force and Motion
... tion or changes in motion. Another term that is used is net force, which is the sum of all the forces acting on an object. Most of the time there is actually more than one force acting on an object. These forces are in equilibrium with each other, that is, two equal but opposite forces produce no mo ...
... tion or changes in motion. Another term that is used is net force, which is the sum of all the forces acting on an object. Most of the time there is actually more than one force acting on an object. These forces are in equilibrium with each other, that is, two equal but opposite forces produce no mo ...
The Sunspots - Scientific Research Publishing
... where p ( ρ , T , H ) is the hydrostatic pressure and H2/8π the hydrostatic magnetic pressure [5] [7]; H ( x ,t ) represents the magnetic field in that region, ρ ( x ,t ) the mass density of the solar fluid and g the acceleration ...
... where p ( ρ , T , H ) is the hydrostatic pressure and H2/8π the hydrostatic magnetic pressure [5] [7]; H ( x ,t ) represents the magnetic field in that region, ρ ( x ,t ) the mass density of the solar fluid and g the acceleration ...
High Energy Processes in Young Stellar Objects
... astrophysics and evolution of the circumstellar disk – Introduction of MHD turbulence and viscosity, thereby regulating accretion onto the star – Magnetically coupling star to disk, and disk to outflow ...
... astrophysics and evolution of the circumstellar disk – Introduction of MHD turbulence and viscosity, thereby regulating accretion onto the star – Magnetically coupling star to disk, and disk to outflow ...
Beyond Ideal MHD - Harvard-Smithsonian Center for Astrophysics
... The scales in the problem are set by viscosity and resistivity ...
... The scales in the problem are set by viscosity and resistivity ...
Neutron star to strange star - Institute of Physics, Bhubaneswar
... properties of the neutron star. Our models deals only with the magnetic field affecting the EOS of the star matter. The charged particles are landau quantized perpendicular to the magnetic field. The number density and the energy density changes. The EOS becomes softer due to the magnetic field. The ...
... properties of the neutron star. Our models deals only with the magnetic field affecting the EOS of the star matter. The charged particles are landau quantized perpendicular to the magnetic field. The number density and the energy density changes. The EOS becomes softer due to the magnetic field. The ...
REPORTS Terahertz Magnetic Response from Artificial Materials
... natural and artificial magnetic materials, can play a key role in terahertz devices. The range of electromagnetic material response found in nature represents only a small subset of that which is theoretically possible. This limited range can be extended by the use of artificially structured material ...
... natural and artificial magnetic materials, can play a key role in terahertz devices. The range of electromagnetic material response found in nature represents only a small subset of that which is theoretically possible. This limited range can be extended by the use of artificially structured material ...
Lorentz force velocimetry
Lorentz force velocimetry (LFV) is a noncontact electromagnetic flow measurement technique. LFV is particularly suited for the measurement of velocities in liquid metals like steel or aluminium and is currently under development for metallurgical applications.The measurement of flow velocities in hot and aggressive liquids such as liquid aluminum and molten glass constitutes one of the grand challenges of industrial fluid mechanics. Apart from liquids, LFV can also be used to measure the velocity of solid materials as well as for detection of micro-defects in their structures.A Lorentz force velocimetry system is called Lorentz force flowmeter (LFF). A LFF measures the integrated or bulk Lorentz force resulting from the interaction between a liquid metal in motion and an applied magnetic field. In this case the characteristic length of the magnetic field is of the same order of magnitude as the dimensions of the channel. It must be addressed that in the case where localized magnetic fields are used, it is possible to perform local velocity measurements and thus the term Lorentz force velocimeter is used.