Accession Number : ADA181047

Title :   Secondary Radiation-Driven Thermal Instability.

Descriptive Note : Memorandum rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s) : Goldberg,L P ; Dahlburg,R B

PDF Url : ADA181047

Report Date : 04 May 1987

Pagination or Media Count : 29

Abstract : By means of numerical simulation we determine the two-dimensional stability properties of the one-dimensional secondary equilibrium state of a radiation-driven thermally unstable fluid reported by Oran, Mariska, and Boris (1982). We find that strong secondary instabilities occur, and that the perturbed system tends to move toward a two-dimensional state. The mass density forms clump-like structures, while the temperature profile exhibits a kink-like instability. In an appendix we formulate an eigenvalue problem for the linear stability of the secondary equilibrium. Keywords: Instability; Condensation; Solar atmosphere.

Descriptors :   *SOLAR ATMOSPHERE, *THERMAL INSTABILITY, MATHEMATICAL MODELS, NUMERICAL ANALYSIS, ONE DIMENSIONAL, PERTURBATIONS, PROFILES, SECONDARY, LINEARITY, STABILITY, TEMPERATURE, CONDENSATION, EIGENVALUES, EQUILIBRIUM(GENERAL)

Subject Categories : Astrophysics
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE