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We have developed a multidimensional radiation hydrodynamics code to simulatethe interaction of radial stellar pulsation and convection for full amplitudepulsating models. Convection is computed using large eddy simulations. Here weperform three-dimensional simulations of RR Lyrae stars for comparison withpreviously reported two-dimensional simulations. We find that the timedependent behavior of the peak convective flux on pulsation phase is verysimilar in both the two-dimensional and three-dimensional calculations. Thegrowth rates of the pulsation in the two-dimensional calculations are about$0.1\%$ higher than in the three-dimensional calculations.The amplitude of thelight curve for a 6500 K RR Lyrae model is essentially the same for our 2D and3D calculations, as is the rising light curve. There are differences in slopeat various times during falling light.

astrophysical journal/the astrophysical journal

Radial Stellar Pulsation and Three-Dimensional Convection. III.  Comparison of Two-Dimensional and Three-Dimensional Convection Effects on  Radial Pulsation