28 citations · 363 across the 65 of their papers we have counts for
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Variational Principles for Nonbarotropic Fluid Dynamics
Asher Yahalom
Barotropic fluid flows with the same circulation structure as steady flows generically have comoving physical surfaces on which the vortex lines lie. These become Bernoullian surfa…
Generalized Cross Helicity in Non-ideal Magnetohydrodynamics
Prachi Sharma, Asher Yahalom
The objective of the present paper is to investigate the constancy of the topological invariant denoted non-barotropic generalized cross helicity in the case of non-ideal magnetohy…
Noether Currents for Eulerian Variational Principles in Non Barotropic Magnetohydrodynamics and Topological Conservations Laws
Asher Yahalom, Hong Qin
We derive a Noether current for the Eulerian variational principle of ideal non-barotropic magnetohydrodynamics (MHD). It was shown previously that ideal non-barotropic MHD is math…
Simplified Variational Principles for Barotropic Fluid Dynamics
Asher Yahalom, Donald Lynden-Bell
We introduce a three independent functions variational formalism for stationary and non-stationary barotropic flows. This is less than the four variables which appear in the standa…
A Variational Procedure for Time-Dependent Processes
R. Englman, A. Yahalom
A simple variational Lagrangian is proposed for the time development of an arbitrary density matrix, employing the "factorization" of the density. Only the "kinetic energy" appears…
A Simpler Eulerian Variational Principle for Barotropic Fluids
Asher Yahalom
The variational principle of barotropic Eulerian fluid dynamics is known to be quite cumbersome containing as much as eleven independent functions. This is much more than the the f…