Last change
on this file since 181 was
181,
checked in by pinsard, 12 years ago
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fix some svn propset
|
-
Property svn:keywords set to
Id URL
|
File size:
681 bytes
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Line | |
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1 | ;+ |
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2 | ; |
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3 | ; ======== |
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4 | ; psiu.pro |
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5 | ; ======== |
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6 | ; |
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7 | ; .. function:: psiu(zet) |
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8 | ; |
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9 | ; DESCRITPION |
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10 | ; =========== |
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11 | ; |
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12 | ; EVOLUTIONS |
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13 | ; ========== |
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14 | ; |
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15 | ; $Id$ |
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16 | ; |
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17 | ; $URL$ |
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18 | ; |
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19 | ; - fplod 20120319 |
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20 | ; |
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21 | ; * minimal header |
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22 | ; |
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23 | ;- |
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24 | function psiu, zet |
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25 | |
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26 | x=(1-15*zet)^.25 |
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27 | psik=2*alog((1+x)/2)+alog((1+x*x)/2)-2*atan(x)+2*atan(1) |
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28 | x=(1-10.15*zet)^.3333 |
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29 | psic=1.5*alog((1+x+x*x)/3)-sqrt(3)*atan((1+2*x)/sqrt(3))+4*atan(1)/sqrt(3) |
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30 | f=zet*zet/(1+zet*zet) |
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31 | psi=(1-f)*psik+f*psic |
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32 | |
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33 | ii=where(zet ge 0.) |
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34 | |
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35 | if (ii(0) ne -1) then begin |
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36 | c=min([50,.35*zet]) |
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37 | psi(ii)=-((1+1.*zet(ii))^1.+.667*(zet(ii)-14.28)/exp(c(ii))+8.525) |
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38 | endif |
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39 | |
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40 | return, psi |
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41 | |
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42 | end |
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