Add type "DimensionlessRatio"

[modelica-trac-importer]

Reported by fcasella on 14 May 2013 09:16 UTC
Like in #779 I would also add DimensionlessRatio.

type DimensionlessRatio = Real(unit = "1");

A variable is measured in per unit when its value is referred to some nominal value, but this is not the case for quantities such as the Reynolds number, which is not the ratio of a variable to its nominal value, but rather the ratio of two expressions that turn out to have the same units. I would not say that a fouling factor or a Reynolds number are given in per units.

It would also be important to use this unit throughout the MSL wherever appropriate. Though I guess this is a non-trivial task that could/should be moved to MSL 3.3.

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Migrated-From: https://trac.modelica.org/Modelica/ticket/1097

[modelica-trac-importer]

Comment by otter on 13 Dec 2015 16:34 UTC
Fixed in fe06113 by adding the suggested DimensionlessRatio type

[modelica-trac-importer]

Changelog modified by otter on 13 Dec 2015 16:34 UTC
Add DimensionLessRatio type to SIunits

[modelica-trac-importer]

Modified by beutlich on 13 Dec 2015 18:23 UTC

[modelica-trac-importer]

Changelog modified by beutlich on 13 Dec 2015 18:23 UTC
Added DimensionLessRatio type to SIunits