cd_lichtarowicz.f File Reference

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Functions/Subroutines
subroutine	cd_lichtarowicz (cd, cdu, reynolds, amod, bdh)

Function/Subroutine Documentation

cd_lichtarowicz()

subroutine cd_lichtarowicz	(	real*8	cd,
		real*8	cdu,
		real*8	reynolds,
		real*8	amod,
		real*8	bdh
	)

!
      implicit none
!
      real*8 cdu,reynolds,amod,bdh,eps,a1,cd_diff,cd0,cd
!
      cd0=cdu
      cd_diff=1.d0
!
      do
!        
         if(cd_diff.lt.1.d-3) exit
!
         cd=cd0
         a1=20/(reynolds*dsqrt(1.d0-amod**2))*(1.d0+2.25d0*bdh)
         eps=(0.005d0*bdh)/(1.d0+7.5d0*(log10(0.00015d0*reynolds*
     &        dsqrt(1.d0-amod**2)/cd))**2)
               
         cd=((-1/cdu+eps)+dsqrt((1/cdu-eps)**2.d0+4.d0*a1))/(2*a1)
!
         cd_diff=dabs(cd-cd0)
!
         cd0=cd
!
       enddo
!     
         return