D111 近接連星系における降着円盤の輻射冷却を伴った流体数値シミュレーション

概要

論文の詳細を見る
Two-dimensional numerical simulations of accretion disks in a close binary system were performed by solving the Euler equations with radiative transfer. We used the flux limiting diffusion approximation to calculate the radiative transfer. The cooling effect of the disk is considered by discharging energy in the vertical directions from the top and bottom surface of the disk. The influence of radiative cooling has been accounted for by assuming a specific heat ratioγwhich is smaller than that of a mono-atomic gas (=5/3). In the present study, the specific heat ratio was assumed to be constant while radiative cooling effect was included as the non-adiabatic process. Our calculation showed that in the neighborhood of compact star a disk structure appears and the spiral shocks were formed. Spiral shocks also appear at the outer edge of the disk but are found to be unstable. It was found that the mass of the disk became larger when radiative cooling effect was accounted for than that assumingγ=5/3.
日本流体力学会の論文
2002-07-23