Destabilization of Compressible Convection by Radiation: Quantitative Evaluation

Abstract

view Abstract Citations (1) References (23) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Destabilization of Compressible Convection by Radiation: Quantitative Evaluation Cheng, Q. Q. ; Hossain, Murshed ; Mullan, D. J. Abstract We simulate time-dependent compressible hydrodynamic convection including the effects of radiative transfer (RT). The gray RT equation is solved along bundles of parallel rays using an integral method. Applying a perturbation to an initial polytrope, we follow the flows for many sound-crossing times. In the linear regime, we report on a case where, in the presence of radiation, the critical Rayleigh number Rac(rad) for onset of convection is at least 20%-30% smaller than the value of Rac in the absence of radiation. In the nonlinear regime, we report on another case where the entropy gradients and maximum flow speeds in the presence of radiation are larger by factors of at least 40%-60% than the corresponding quantities in the nonradiative case. Publication: The Astrophysical Journal Pub Date: July 1995 DOI: 10.1086/175917 Bibcode: 1995ApJ...447..789C Keywords: CONVECTION; HYDRODYNAMICS; METHODS: NUMERICAL; RADIATIVE TRANSFER; STARS: INTERIORS full text sources ADS |