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:
832 bytes
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| 1 | real function psim(z,al) |
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| 2 | |
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| 3 | !********************************************************************** |
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| 4 | ! * |
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| 5 | ! DESCRIPTION: CALCULATION OF THE STABILITY CORRECTION FUNCTION FOR * |
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| 6 | ! MOMENTUM AS FUNCTION OF HEIGHT Z AND OBUKHOV SCALE * |
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| 7 | ! HEIGHT L * |
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| 8 | ! * |
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| 9 | !********************************************************************** |
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| 10 | |
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| 11 | use par_mod |
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| 12 | |
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| 13 | implicit none |
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| 14 | |
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| 15 | real :: z,al,zeta,x,a1,a2 |
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| 16 | |
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| 17 | zeta=z/al |
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| 18 | if(zeta.le.0.) then |
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| 19 | ! UNSTABLE CASE |
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| 20 | x=(1.-15.*zeta)**0.25 |
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| 21 | a1=((1.+x)/2.)**2 |
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| 22 | a2=(1.+x**2)/2. |
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| 23 | psim=log(a1*a2)-2.*atan(x)+pi/2. |
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| 24 | else |
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| 25 | ! STABLE CASE |
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| 26 | psim=-4.7*zeta |
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| 27 | endif |
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| 28 | |
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| 29 | end function psim |
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