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Diffusive error

Diffusive errors come from the diffusive property of MHD equations. In some cases, there are some sharp boundaries between two parts of the simulation region. But because of the error of the numerical computation, such sharp boundaries can be smoothed. Figure 4(top) shows an example of such error. Generally, diffusive errors smooth the parameter variation in space and make the spatial configuration more flat.

Figure 4: Two types of errors: Diffusive error and Fluctuation error.