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This project forked from sxs-collaboration/spectre
License: Other
Implement the TCI on the DG grid
Currently we have many double persson_tci_epsilon
which is set to the same value(=1e-18) around many spots in the code, so maybe cleanup these and make it as an option specifiable one?
The TCI-ing criteria of current implementation uses the following lines:
if (l2Norm(*filtered_component) <= zero_cutoff * l2Norm(component)) {
continue;
}
if (std::log10(l2Norm(*filtered_component) / l2Norm(component)) >
-alpha * std::log10(static_cast<double>(dg_mesh.extents(d) - 1))) {
return true;
}
which may be simplified to its equivalent form without using log
:
l2_norm_filtered * N ** alpha > l2_norm_component
where N = dg.mesh.extent(d)-1.
This way may have some computational speed-ups (however, up to the cost of pow
function) as well as that we do not need the zero_cutoff
(persson_epsilon) and the first if
branch using it.
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