TELEMAC-MASCARET Forum: Include tracer in BOTTOM BOUNDARY CONDITIONS? (1/1)

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TOPIC: Include tracer in BOTTOM BOUNDARY CONDITIONS?

Include tracer in BOTTOM BOUNDARY CONDITIONS? 5 years 10 months ago #32457

pilou1253
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openTELEMAC Guru
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Hi all and Happy New Year!

I wonder if it is possible to activate tracers at the bottom boundary?

The manual states that only velocities can be prescribed at this boundary and a quick and dirty test to include a tracer from LIMI3D in the test case bottom_bc indicates that some other changes are required to do that. Which subroutines need to be amended in that case?

It could be a nice feature to study dispersion from polluted groundwater for example.

Thanks in advance!

Best regards
PL

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Include tracer in BOTTOM BOUNDARY CONDITIONS? 5 years 9 months ago #32935

qilong
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Posts: 340
Thank you received: 33

Hello,

I used LIMI3D to prescribe the velocity at bottom boundary and it worked.

I'm not totally sure but maybe you could try LIMI3D for the tracers as well.

To be more specific, I think you will need to modify the following lines in LIMI3D:

DO IPOIN2 = 1,NPOIN2
LITABF%ADR(ITRAC)%P%I(IPOIN2) = KLOG
TABORF%ADR(ITRAC)%P%R(IPOIN2) = 0.D0
ENDDO

ITRAC is the tracer index. Change the KLOG to KENT and give your values in the second line for each node at bottom.

Hopefully this will be enough for prescribing the bottom boundary for tracer.

Best regards,
Qilong

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