From a12853f6090ca65a38ce665ddd7c67e9acb88378 Mon Sep 17 00:00:00 2001 From: Martin Kronbichler Date: Mon, 4 Dec 2017 15:56:33 +0100 Subject: [PATCH] Add changelog. --- doc/news/changes/major/20171204MartinKronbichler | 11 +++++++++++ 1 file changed, 11 insertions(+) create mode 100644 doc/news/changes/major/20171204MartinKronbichler diff --git a/doc/news/changes/major/20171204MartinKronbichler b/doc/news/changes/major/20171204MartinKronbichler new file mode 100644 index 0000000000..df53b52a66 --- /dev/null +++ b/doc/news/changes/major/20171204MartinKronbichler @@ -0,0 +1,11 @@ +Improved: The mesh smoothing algorithms applied in the Triangulation class and +MappingQGeneric have been changed from the old Laplace-style smoothing to a +transfinite interpolation that linearly blends between the descriptions on the +faces around a cell. The old transformation introduced boundary layers inside +cells that prevented convergence rates to exceed 3.5 in the global L2 errors +on typical settings, whereas all derivatives in the mapping from unit to real +cell are bounded by the derivatives of the manifold description. This change +also considerably improves mesh quality on settings where curved descriptions +were only applied to the boundary rather than the whole volume. +
+(Martin Kronbichler, 2017/12/04) -- 2.39.5