[aspect-devel] How ASPECT overcomes numerical diffusion?

[ZhangQingwen]

Hi all,I have been curious that, if several composition fields advect passively with a given velocity field, the boundaries between these composition fields will not be as sharp as they were, or more seriously, the code goes wrong, so how dose ASPECT deal with this issue of numerical diffusion? For some particle-based (or, marker-based) codes like Underworld, it is not a problem because advection relies on extra passive particles moving with velocity field and artificial errors will be minimized.
Best,Qw 		 	   		  
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