TELEMAC-MASCARET Forum: Not getting proper results with FVM flow for suspended sediments (1/1)

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TOPIC: Not getting proper results with FVM flow for suspended sediments

Not getting proper results with FVM flow for suspended sediments 9 years 6 months ago #16827

gourish

Hi,
I am running a simulation with Telemac coupled with Sisyphe. I have used Finite volume method for the flow. When I couple the simulation with Sisyphe and give "SUSPENSION : YES". I get the following listing, where most of the listing values shows as NaN.

================================================================================
 ITERATION     9000    TIME:  5 MN  53.7601 S   (      353.7601 S)
--------------------------------------------------------------------------------
                    DIFFUSION-PROPAGATION STEP
 TIME-STEP:    8.5896160048980416E-002
--------------------------------------------------------------------------------
                       BALANCE OF WATER VOLUME
     VOLUME IN THE DOMAIN :             NaN M3
     FLUX BOUNDARY    1:              NaN M3/S  ( >0 : ENTERING  <0 : EXITING )
     ABSOLUTE ERROR IN VOLUME AT T =        353.8    S:              NaN

================================================================================
 ITERATION     9000    TIME:  5 MN  53.7994 S     (    353.7994 S)

 CVTRVF_POS (SCHEME 13 OR 14):   1 ITERATIONS
 GMRES (BIEF) :        1 ITERATIONS, RELATIVE PRECISION:             NaN
 MAXIMAL CONCENTRATION    :              NaN %, NODE =        1
 MINIMAL CONCENTRATION    :              NaN %, NODE =        1
 MAXIMAL EVOLUTION        :              NaN  , NODE =        1
 MINIMAL EVOLUTION        :              NaN  , NODE =        1
 MAX. CFL FOR SUSPENSION  :         Infinity  , NODE =        1
 TOTAL MAXIMAL EVOLUTION  :              NaN NODE  :      1
 TOTAL MINIMAL EVOLUTION  :              NaN NODE  :      1

================================================================================
 ITERATION    18000    TIME: 11 MN  47.6993 S   (      707.6993 S)
--------------------------------------------------------------------------------
                    DIFFUSION-PROPAGATION STEP
 TIME-STEP:    8.8141609999924861E-002
--------------------------------------------------------------------------------
                       BALANCE OF WATER VOLUME
     VOLUME IN THE DOMAIN :             NaN M3
     FLUX BOUNDARY    1:              NaN M3/S  ( >0 : ENTERING  <0 : EXITING )
     ABSOLUTE ERROR IN VOLUME AT T =        707.7    S:              NaN

================================================================================
 ITERATION    18000    TIME: 11 MN  47.7386 S     (    707.7386 S)

 CVTRVF_POS (SCHEME 13 OR 14):   1 ITERATIONS
 GMRES (BIEF) :        1 ITERATIONS, RELATIVE PRECISION:             NaN
 MAXIMAL CONCENTRATION    :              NaN %, NODE =        1
 MINIMAL CONCENTRATION    :              NaN %, NODE =        1
 MAXIMAL EVOLUTION        :              NaN  , NODE =        1
 MINIMAL EVOLUTION        :              NaN  , NODE =        1
 MAX. CFL FOR SUSPENSION  :         Infinity  , NODE =        1
 TOTAL MAXIMAL EVOLUTION  :              NaN NODE  :      1
 TOTAL MINIMAL EVOLUTION  :              NaN NODE  :      1

 TOTAL MINIMAL EVOLUTION  :              NaN NODE  :      1

The simulation runs properly giving proper results when "BED LOAD : YES" and "SUSPENSION : NO", however with "SUSPENSION : YES" the same results as above are attained.
Has anyone tried with suspension, and flow in FVM. Are there any more parameters which needs to be set. Or is it that suspension using FVM is not implemented so far.

I have attached the complete simulation files.

File Attachment:

File Name: sedfvmcase.zip
File Size: 506 KB

Thanks,
Gourish

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Not getting proper results with FVM flow for suspended sediments 9 years 6 months ago #16829

gourish

Hi,

I have changed the type of Advection from "TYPE OF ADVECTION : 14"
to "TYPE OF ADVECTION : 5", and now it is working, however I still have a question as why advection scheme 13 or 14 gives the error as stated.
Apparently the simulation has "TIDAL FLAT : YES", which was the reason
as why I had used advection scheme 14 (14 especially because I had used FVM for flow). However is it fine to use advection scheme 5, in case if 13 or 14 does not work.

Thanks,
Gourish

The administrator has disabled public write access.