root/trunk/Modelica/Constants.mo

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updated the copyright notices to 2008 (closes ticket:47)
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1within Modelica;
2package Constants
3  "Library of mathematical constants and constants of nature (e.g., pi, eps, R, sigma)"
4
5  import SI = Modelica.SIunits;
6  import NonSI = Modelica.SIunits.Conversions.NonSIunits;
7
8  extends Modelica.Icons.Library2;
9
10  // Mathematical constants
11  final constant Real e=Modelica.Math.exp(1.0);
12  final constant Real pi=2*Modelica.Math.asin(1.0); // 3.14159265358979;
13  final constant Real D2R=pi/180 "Degree to Radian";
14  final constant Real R2D=180/pi "Radian to Degree";
15
16  // Machine dependent constants
17  // (the definition is a temporary fix since not adapted to the
18  // machine where the Modelica translator is running)
19  final constant Real eps=1.e-15 "Biggest number such that 1.0 + eps = 1.0";
20  final constant Real small=1.e-60
21    "Smallest number such that small and -small are representable on the machine";
22  final constant Real inf=1.e+60
23    "Biggest Real number such that inf and -inf are representable on the machine";
24  final constant Integer Integer_inf=2147483647
25    "Biggest Integer number such that Integer_inf and -Integer_inf are representable on the machine";
26
27  // Constants of nature
28  // (name, value, description from http://physics.nist.gov/cuu/Constants/)
29  final constant SI.Velocity c=299792458 "Speed of light in vacuum";
30  final constant SI.Acceleration g_n=9.80665
31    "Standard acceleration of gravity on earth";
32  final constant Real G(final unit="m3/(kg.s2)") = 6.6742e-11
33    "Newtonian constant of gravitation";
34  final constant SI.FaradayConstant F = 9.64853399e4 "Faraday constant, C/mol";
35  final constant Real h(final unit="J.s") = 6.6260693e-34 "Planck constant";
36  final constant Real k(final unit="J/K") = 1.3806505e-23 "Boltzmann constant";
37  final constant Real R(final unit="J/(mol.K)") = 8.314472 "Molar gas constant";
38  final constant Real sigma(final unit="W/(m2.K4)") = 5.670400e-8
39    "Stefan-Boltzmann constant";
40  final constant Real N_A(final unit="1/mol") = 6.0221415e23
41    "Avogadro constant";
42  final constant Real mue_0(final unit="N/A2") = 4*pi*1.e-7 "Magnetic constant";
43  final constant Real epsilon_0(final unit="F/m") = 1/(mue_0*c*c)
44    "Electric constant";
45  final constant NonSI.Temperature_degC T_zero=-273.15
46    "Absolute zero temperature";
47
48  annotation (
49    Documentation(info="<html>
50<p>
51This package provides often needed constants from mathematics, machine
52dependent constants and constants from nature. The latter constants
53(name, value, description) are from the following source:
54</p>
55
56<dl>
57<dt>Peter J. Mohr and Barry N. Taylor (1999):</dt>
58<dd><b>CODATA Recommended Values of the Fundamental Physical Constants: 1998</b>.
59    Journal of Physical and Chemical Reference Data, Vol. 28, No. 6, 1999 and
60    Reviews of Modern Physics, Vol. 72, No. 2, 2000. See also <a href=
61\"http://physics.nist.gov/cuu/Constants/\">http://physics.nist.gov/cuu/Constants/</a></dd>
62</dl>
63
64<p>CODATA is the Committee on Data for Science and Technology.</p>
65
66<dl>
67<dt><b>Main Author:</b></dt>
68<dd><a href=\"http://www.robotic.dlr.de/Martin.Otter/\">Martin Otter</a><br>
69    Deutsches Zentrum f&uuml;r Luft und Raumfahrt e. V. (DLR)<br>
70    Oberpfaffenhofen<br>
71    Postfach 11 16<br>
72    D-82230 We&szlig;ling<br>
73    email: <a href=\"mailto:Martin.Otter@dlr.de\">Martin.Otter@dlr.de</a></dd>
74</dl>
75
76
77<p>
78Copyright &copy; 1998-2008, Modelica Association and DLR.
79</p>
80<p>
81<i>This Modelica package is <b>free</b> software; it can be redistributed and/or modified
82under the terms of the <b>Modelica license</b>, see the license conditions
83and the accompanying <b>disclaimer</b> 
84<a href=\"Modelica://Modelica.UsersGuide.ModelicaLicense\">here</a>.</i>
85</p><br>
86</html>
87", revisions="<html>
88<ul>
89<li><i>Nov 8, 2004</i>
90       by <a href=\"http://www.robotic.dlr.de/Christian.Schweiger/\">Christian Schweiger</a>:<br>
91       Constants updated according to 2002 CODATA values.</li>
92<li><i>Dec 9, 1999</i>
93       by <a href=\"http://www.robotic.dlr.de/Martin.Otter/\">Martin Otter</a>:<br>
94       Constants updated according to 1998 CODATA values. Using names, values
95       and description text from this source. Included magnetic and
96       electric constant.</li>
97<li><i>Sep 18, 1999</i>
98       by <a href=\"http://www.robotic.dlr.de/Martin.Otter/\">Martin Otter</a>:<br>
99       Constants eps, inf, small introduced.</li>
100<li><i>Nov 15, 1997</i>
101       by <a href=\"http://www.robotic.dlr.de/Martin.Otter/\">Martin Otter</a>:<br>
102       Realized.</li>
103</ul>
104</html>")
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159end Constants;
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