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"BEDLOAD FLUX" is greater than the LIQ file.
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TOPIC: "BEDLOAD FLUX" is greater than the LIQ file.

"BEDLOAD FLUX" is greater than the LIQ file. 4 years 3 months ago #36550

  • doggo3
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Hello,
I have a problem about T2D + SISYPHE. (V8r1).

Question:
The calculated "BEDLOAD FLUX" in Boudary 4 are greater than the specified value in the LIQ file.
How can I make them match?

*4th liquid boundary for SYS is "4 5 5 1.000 0.000 0.000 0.000 4 0.000 0.000 0.000".
*Doesn't SISYPHE have an option like "OPTION FOR LIQUID BOUNDARIES = 1" in TELEMAC2D?

Regards.

================================================================================
 ITERATION    18000    TIME 29 MN  60.0000 S     (   1800.0000 S)

 BEDLOAD EQUATION SOLVED IN     1 ITERATIONS
--------------------------------------------------------------------------------
                           SEDIMENT SLIDE

 MASS-BALANCE (IN VOLUME, INCLUDING VOID)
 SUM OF THE EVOLUTIONS     0.9166667E-02 M3
 BOUNDARY   1 BEDLOAD FLUX =    -0.000000      ( M3S  0 = ENTERING )
 BOUNDARY   2 BEDLOAD FLUX =    -0.000000      ( M3S  0 = ENTERING )
 BOUNDARY   3 BEDLOAD FLUX =    -0.000000      ( M3S  0 = ENTERING )
 BOUNDARY   4 BEDLOAD FLUX =    0.9166667E-02  ( M3S  0 = ENTERING )
 TOTAL        BEDLOAD FLUX =    0.9166667E-02  ( M3S  0 = ENTERING )
 LOST VOLUME                         0.6938894E-17 M3  ( IF 0 EXIT )


================================================================================
 ITERATION    36000    TIME 59 MN  60.0000 S     (   3600.0000 S)

 BEDLOAD EQUATION SOLVED IN     2 ITERATIONS
--------------------------------------------------------------------------------
                           SEDIMENT SLIDE

 MASS-BALANCE (IN VOLUME, INCLUDING VOID)
 SUM OF THE EVOLUTIONS     0.3500000E-01 M3
 BOUNDARY   1 BEDLOAD FLUX =    -0.000000      ( M3S  0 = ENTERING )
 BOUNDARY   2 BEDLOAD FLUX =    -0.000000      ( M3S  0 = ENTERING )
 BOUNDARY   3 BEDLOAD FLUX =    -0.000000      ( M3S  0 = ENTERING )
 BOUNDARY   4 BEDLOAD FLUX =    0.3500000E-01  ( M3S  0 = ENTERING )
 TOTAL        BEDLOAD FLUX =    0.3500000E-01  ( M3S  0 = ENTERING )
 LOST VOLUME                         0.1283695E-14 M3  ( IF 0 EXIT )



================================================================================
 ITERATION    91800    TIME  2 H 33 MIN   0.0000 S     (   9180.0000 S)

 BEDLOAD EQUATION SOLVED IN     3 ITERATIONS
--------------------------------------------------------------------------------
                           SEDIMENT SLIDE

 MASS-BALANCE (IN VOLUME, INCLUDING VOID)
 SUM OF THE EVOLUTIONS     0.3066667     M3
 BOUNDARY   1 BEDLOAD FLUX =    -0.000000      ( M3S  0 = ENTERING )
 BOUNDARY   2 BEDLOAD FLUX =    -0.000000      ( M3S  0 = ENTERING )
 BOUNDARY   3 BEDLOAD FLUX =    -0.000000      ( M3S  0 = ENTERING )
 BOUNDARY   4 BEDLOAD FLUX =    0.3066667      ( M3S  0 = ENTERING )
 TOTAL        BEDLOAD FLUX =    0.3066667      ( M3S  0 = ENTERING )
 LOST VOLUME                        -0.7549517E-14 M3  ( IF 0 EXIT )
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"BEDLOAD FLUX" is greater than the LIQ file. 4 years 3 months ago #36552

  • doggo3
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Ifound the reason.

#34649
The difference of values between my liq file and the bedload flux in the listing is normal because the discharge in the liq file is without the porosity althought the listing take it into account (see the note at the bottom of page 26 of the manual).
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"BEDLOAD FLUX" is greater than the LIQ file.

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