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Remark That 3pt EPS Changes Function Shape in [Sr, Smax]

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The three-point vertical scaling option will usually change the
shape of the relative permeability function in the saturation
interval between the scaled critical displacing saturation and the
maximum phase saturation.  In particular, we usually replace a
general, non-linear function with a linear approximation when
applying three-point vertical scaling.

Add a comment to that effect.
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Bård Skaflestad
2018-10-24 13:03:59 +02:00
parent dc8931f782
commit d6862265b7
1 changed files with 6 additions and 2 deletions
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8
ThirdParty/custom-opm-flowdiag-app/opm-flowdiagnostics-applications/opm/utility/ECLEndPointScaling.cpp vendored
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@@ -516,7 +516,9 @@ vertScale(const FunctionValues& f,
// s \in [sr, sm), sm > sr; normal case: Kr(Smax) > Kr(Sr).
//
// Linear function between (sr,fr) and (sm,fm) in terms of
// function value 'y'.
// function value 'y'. This usually alters the shape of the
// relative permeability function in this interval (e.g.,
// roughly quadratic to linear).
const auto t = (y - fdisp) / (fmax - fdisp);
y = fr + t*(fm - fr);
@@ -525,7 +527,9 @@ vertScale(const FunctionValues& f,
// s \in [sr, sm), sm > sr; special case: Kr(Smax) == Kr(Sr).
//
// Use linear function between (sr,fr) and (sm,fm) in terms of
// saturation value 's'.
// saturation value 's'. This usually alters the shape of the
// relative permeability function in this interval (e.g.,
// roughly quadratic to linear).
const auto t = (s - sr) / (sm - sr);
y = fr + t*(fm - fr);