10.4.1_peseiGFS_025bugfixes+enhancementsdevrelease-10release-10.4.1scaling-bug
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Last change
on this file since 3481cc1 was
3481cc1,
checked in by Ignacio Pisso <ip@…>, 4 years ago
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move license from headers to a different file
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Property mode set to
100644
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File size:
611 bytes
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| 1 | real function ew(x) |
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| 2 | |
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| 3 | !**************************************************************** |
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| 4 | !SAETTIGUNGSDAMPFDRUCK UEBER WASSER IN PA. X IN KELVIN. |
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| 5 | !NACH DER GOFF-GRATCH-FORMEL. |
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| 6 | !**************************************************************** |
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| 7 | |
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| 8 | implicit none |
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| 9 | |
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| 10 | real :: x, y, a, c, d |
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| 11 | |
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| 12 | ew=0. |
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| 13 | if(x.le.0.) stop 'sorry: t not in [k]' |
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| 14 | y=373.16/x |
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| 15 | a=-7.90298*(y-1.) |
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| 16 | a=a+(5.02808*0.43429*alog(y)) |
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| 17 | c=(1.-(1./y))*11.344 |
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| 18 | c=-1.+(10.**c) |
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| 19 | c=-1.3816*c/(10.**7) |
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| 20 | d=(1.-y)*3.49149 |
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| 21 | d=-1.+(10.**d) |
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| 22 | d=8.1328*d/(10.**3) |
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| 23 | y=a+c+d |
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| 24 | ew=101324.6*(10.**y) ! Saettigungsdampfdruck in Pa |
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| 25 | |
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| 26 | end function ew |
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