CalculiX  2.13
A Free Software Three-Dimensional Structural Finite Element Program
cd_Mcgreehan_Schotsch.f File Reference

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Functions/Subroutines

subroutine cd_mcgreehan_schotsch (rzdh, bdh, reynolds, cdu)
 

Function/Subroutine Documentation

◆ cd_mcgreehan_schotsch()

subroutine cd_mcgreehan_schotsch ( real*8  rzdh,
real*8  bdh,
real*8  reynolds,
real*8  cdu 
)
30 !
31  implicit none
32 !
33  real*8 cdu,bdh,reynolds,cd_re,rzdh,cd_r
34 !
35  cd_re=0.5885d0+372d0/reynolds
36 !
37 ! the radius correction
38 !
39  cd_r=1-(0.008d0+0.992d0*exp(-5.5d0*rzdh-3.5d0*rzdh**2))
40  & *(1-cd_re)
41 !
42  cdu=1.d0-(1.d0-cd_r)*(1d0+1.3d0*exp(-1.606d0*(bdh*bdh)))
43  & *(0.435d0+0.021d0*bdh)
44 !
45  return
46 !
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