Fig. 12
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Temporal convergence of the IMEX Runge-Kutta schemes in MPI-AMRVAC. The error computed as 
, where N is the total number of grid points, is plotted as a function of the timestep used to obtain the numerical solutions u and υ using IMEX schemes. The uref and υref are the reference numerical solutions obtained using an explicit scheme with a much smaller timestep.
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