In this paper we derive and analyse a class of linearly implicit schemes which includes the one of Feistauer and Ku\v{c}era (JCP 2007) as well as the class of RS-IMEX schemes. The implicit part is based on a Jacobian matrix which is evaluated at a reference state. This state can be either the solution at the old time level as in Feistauer and Ku\v{c}era (JCP 2007), or a numerical approximation of the incompressible limit equations as in Zeifang et al. (Commun. Comput. Phys. 2009), or possibly another state. Subsequently, it is shown that this class of methods is asymptotically preserving under the assumption of a discrete Hilbert expansion. For a one-dimensional setting with some limitations on the reference state, the existence of a discrete Hilbert expansion is shown.
翻译:在本文中,我们得出并分析了包括Feistauer和Ku\v{c}era(JCP 2007)以及RS-IMEX计划一类的线性隐含计划(JCP 2007),隐含部分基于在参考状态下评估的Jacobian矩阵。这个状态可以是像Feistauer和Ku\v{c}era(JCP 2007)那样的旧时期的解决方案,也可以是Zeifang等人(Commun.comput.Phys.2009)那样的不可压缩的极限方程的数字近似值,也可能是另一个状态。随后,它表明这一类方法在离散的Hilbert扩张假设下是静态的。对于对参考状态有某些限制的一维设置,可以显示离散的Hilbert扩张的存在。