Physical Basis for a Constant Lag Time
Earth and Planetary Astrophysics
2012-10-15 v2 Solar and Stellar Astrophysics
Abstract
We show that the constant time lag prescription for tidal dissipation follows directly from the equations of motion of a tidally-forced viscous fluid body, given some basic assumptions. They are (i) dissipation results from a viscous force that is proportional to the velocity of the tidal flow (ii) tidal forcing and dissipation are weak and non-resonant (iii) the equilibrium structure of the forced body is spherically-symmetric. The lag time is an intrinsic property of the tidally-forced body and is independent of the orbital configuration.
Cite
@article{arxiv.1209.5723,
title = {Physical Basis for a Constant Lag Time},
author = {Aristotle Socrates and Boaz Katz},
journal= {arXiv preprint arXiv:1209.5723},
year = {2012}
}
Comments
4 pages