Numerical computations of nonlinear waves in solar atmosphere
Abstract
The upward propagation and evolution of different kinds of perturbations in the solar atmosphere are computed using HSRA as the unperturbed model. A onedimensional compressive flow equation under gravitational acceleration at the solar surface is used as the dynamical equation. Polytropic gas equations with different gammaprimes are used to close this equation set. The results show that an upwardpropagated small perturbation can evolve into shocks at certain heights which are nearly independent of the thermodynamic processes involved, but depend strongly on the strength of the initial perturbation. However, the existence interference of the turbulent field in the solar atmosphere does not allow these perturbations to develop into shocks. This confirms the notion that the mechanical waves generated in the convection zone are not very effective in heating the chromosphere and the corona.
 Publication:

Chinese Journal of Space Science
 Pub Date:
 April 1982
 Bibcode:
 1982ChJSS...2..152Y
 Keywords:

 Atmospheric Models;
 Computational Fluid Dynamics;
 Shock Wave Propagation;
 Small Perturbation Flow;
 Solar Atmosphere;
 Wave Equations;
 Compressible Flow;
 Gravitational Effects;
 Nonlinear Equations;
 One Dimensional Flow;
 Polytropic Processes;
 Solar Physics