Just as electromagnetic waves carry momentum and exert pressure on matter, acoustic and MHD waves that propagate through an inhomogeneous medium also do work on the ﬂuid via similar radiation stresses.
Coronal Heating versus Solar Wind Acceleration
The properties of radiation modiﬁed linear acoustic waves vary dramatically with optical depth and pressure ratio.
A Godunov Method for Multidimensional Radiation Magnetohydrodynamics based on a variable Eddington tensor
Fig. 6.— Phase velocity scaled to the isothermal sound speed (top panel) and damping rate (lower panel) of linear acoustic waves versus the optical depth per wavelength for two different radiation pressures.
A Godunov Method for Multidimensional Radiation Magnetohydrodynamics based on a variable Eddington tensor
Even though the properties of radiation modiﬁed linear acoustic waves vary dramatically over this range of optical depths and pressure ratios, there is good agreement between the numerical and analytic solutions, except when P = 1 and τa > 1.
A Godunov Method for Multidimensional Radiation Magnetohydrodynamics based on a variable Eddington tensor
Phase velocity scaled to the isothermal sound speed (top panel) and damping rate (lower panel) of linear acoustic waves versus the optical depth per wavelength for three different radiation pressures.
A Godunov Method for Multidimensional Radiation Magnetohydrodynamics based on a variable Eddington tensor
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