TELEMAC-MASCARET Forum: About Different Types of Sediment Boundaries (1/1)

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TOPIC: About Different Types of Sediment Boundaries

About Different Types of Sediment Boundaries 11 years 2 months ago #10270

qilong
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Hello,

I'm testing different types of sediment boundaries. Currently I have compared the two types,

KENT (numerical value 5): bottom evolution imposed to EBOR value at a liquid boundary,and
KSORT (numerical value 4): free evolution at a liquid boundary.

But none of them seems to give the results we want. We don't understand these types of boundaries mean. Could you explain what exactly the "imposed evolution" and "free evolution" mean?

Thank you very much!

Qilong

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About Different Types of Sediment Boundaries 11 years 2 months ago #10281

qilong
OFFLINE
Expert Boarder
Posts: 340
Thank you received: 33

Hello,

I'm still testing the boundary conditions for the sediment flux and this time I set the LIEBOR=2 in the SISYPHE boundary condition file. It seems give better results than other types of BC (KENT and KSORT). I also checked the code and I found the following lines in the subroutine DIFFIN:

          IF(CLT(K1).EQ.KLOG.OR.CLT(K2).EQ.KLOG) THEN
!           SEGMENTS OF TYPE NEUMANN
            MASKTR%ADR(NEU)%P%R(K1)=1.D0

So apparently it masks the boundary nodes which have code KLOG(2) as the NEUMANN boundary. But I still don't understand what exactly it does after this masking procedure. Does it mean the DT/DN=0 on the boundary if I use KLOG as the boundary condition for sediment flux?

Thanks in advance!
Qilong

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