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the difference between
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the difference between 9 years 6 months ago #16800

  • zqzuoan
  • zqzuoan's Avatar
Hi, everyone
When I read the telemac2d.f, I have some questions:
IF(NTRAC.GT.0.AND.DIFT) THEN
DO ITRAC=1,NTRAC
CALL OS( 'X=Y ' , X=VISCT%ADR(ITRAC)%P , Y=VISC )
CALL OS( 'X=X+C ' , X=VISCT%ADR(ITRAC)%P , C=DIFNU-PROPNU )
!DIFNU: COEFFICIENT FOR DIFFUSION OF TRACERS
!PROPNU: VELOCITY DIFFUSIVITY
!VISC： VELOCITY DIFFUSIVITY: VELOCITY
!VISCT: VELOCITY DIFFUSIVITY: TRACERS
ENDDO
ENDIF

What's the mean of this program? What's the difference among DIFNU, PROPNU, VISC and VISCT?

Thank you very much.
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the difference between 9 years 6 months ago #16811

  • jmhervouet
  • jmhervouet's Avatar
Hello,

It is the difference between diffusion coefficients of velocities and of tracers. The turbulent part is the same but the molecular viscosity (PROPNU for velocities and DIFNU for tracers) is not the same.

Regards,

JMH
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the difference between 9 years 6 months ago #16819

  • zqzuoan
  • zqzuoan's Avatar
I see. Thank you very much, JMH
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