140 citations · 434 across the 40 of their papers we have counts for
41 papers
Theory of sounds in He II
Christian Fronsdal
A dynamical model for Landau's original approach to superfluid Helium is presented, with two velocities but only one mass density. Second sound is an adiabatic perturbation that in…
Sources for gravity. The Noetherian field theories
Christian Frønsdal
This paper attempts to throw some light on what is the correct choice of sources for Einstein's field equations for the gravitational metric, and on the definition of the Cauchy-No…
A classical mistake and what it tells us. How to do better with an action principle for Hydro and Thermodynamics
Christian Fronsdal
Rayleigh's stability analysis of cylindrical Couette flow, of 1889 and 1916, is in contradiction with observation. The analysis is repeated in many textbooks and reviews up to 2017…
Rotating planets in Newtonian gravity
Christian Fronsdal
Variational techniques have been used in applications of hydrodynamics in special cases but an action that is general enough to deal with both potential flows and solid-body flows,…
Stability analysis for cylindrical Couette flow of compressible fluids
Christian Fronsdal
A new analysis of basic Couette flow, is based on an Action Principle for compressible fluids, with a Hamiltonian as well as a kinetic potential. An effective criterion for stabili…
Action Principle for Hydrodynamics and Thermodynamics including general, rotational flows
Christian Frønsdal
The restriction of hydrodynamics to non-viscous, potential (gradient, irrotational) flows is a theory both simple and elegant; a favorite topic of introductory textbooks. It is kno…