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TOPIC: Erosion flux for mixed sediment

Erosion flux for mixed sediment 10 years 6 months ago #12923

qilong
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Posts: 340
Thank you received: 33

Hello,

Recently I looked at the code for computing erosion flux for mixed sediment. But I'm a little confused about the following piece of code in the subroutine "suspension_computation.f" from line 578 to line 591:

        IF(.NOT.SEDCO) THEN
          IF(DEBUG > 0) WRITE(LU,*) 'SUSPENSION_FLUX_MIXTE'
          CALL SUSPENSION_FLUX_MIXTE(T4,HN,FDM,NPOIN,CHARR,XMVE,XMVS,
     &                               VCE,GRAV,HMIN,XWC,ZERO,
     &                               PARTHENIADES,FLUER,FLUER_VASE,
     &                               ZREF,AC,CSTAEQ,QS_C,ICQ,DEBUG,
     &                               AVAIL,NSICLA,ES,TOCE_VASE,
     &                               TOCE_SABLE,NOMBLAY,
     &                               DT,TOCE_MIXTE%R,MS_SABLE,
     &                               MS_VASE)
          IF (DEBUG > 0) WRITE(LU,*) 'END_SUSPENSION_FLUX_MOY'
        ENDIF
        IF(SEDCO) CALL OS('X=Y     ',X=FLUER, Y=FLUER_VASE)

I think in the subroutine "suspension_flux_mixte.f", FLUER_VASE and FLUER_SABLE are calculated. But in the above code, only for cohesive sediment it sets FLUER=FLUER_VASE. What about non-cohesive sediment? Is there a line missing to set FLUER=FLUER_SABLE if (.NOT. SEDCO)?

Kind regards,
Qilong

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Erosion flux for mixed sediment 10 years 6 months ago #12927

cath OFFLINE Moderator Posts: 52 Thank you received: 24	Hi Qilong, You have two arguments : FLUER and FLUER_VASE (FLUER is for the sand, FLUER_VASE for the mud) FLUER is actually used to compute the concentration and bed evolution. For non-cohesive sediment, FLUER is already computed For cohesive , You have to replace FLUER by FLUER_VASE. This is rather tricky and impose the constraint to solve the sand first. I hope this helps, Cath
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Erosion flux for mixed sediment 10 years 6 months ago #12931

qilong OFFLINE Expert Boarder Posts: 340 Thank you received: 33	Hi Catherine, Thanks for your explanation! It really helps. Kind regards, Qilong
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