Numerical simulation of core convection by a multi-layer semi-implicit spherical spectral method
作者： Tao Cai , Kwing L. Chan , Licai Deng
DOI: 10.1016/J.JCP.2011.08.014
关键词:
摘要: A semi-implicit multi-layer spherical spectral method for simulating stellar core convection is described. The fully compressible three-dimensional hydrodynamic equations with rotation and energy generation are solved. Prognostic variables expressed as finite sums of harmonics in the horizontal directions handled by difference radial direction. stratified approximation used to simplify nonlinearity quadratic. scheme employed overcome time step problem arising from shrinking grid sizes physical space near center star. Despite different truncations layers, round-off conservation total mass angular momentum whole domain can be maintained, were confirmed numerically. code parallelized; 12 processors speedup factor about 9. solutions model without discussed.
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