open TELEMAC-MASCARET The mathematically superior suite of solvers

Hi,
i want to simulate the tracer trasport. I use COMPUTATION CONTINUED, after a steady hydrodinamic condition that it addes in PREVIOUS COMPUTATION FILE.
When i start the run i read this...

TITLE OF PREVIOUS COMPUTATION:

NAME: VELOCITY U UNIT: M/S
NAME: VELOCITY V UNIT: M/S
NAME: FREE SURFACE UNIT: M
NAME: BOTTOM UNIT: M
NAME: BOTTOM FRICTION UNIT:
NAME: HIGHEST VELOCITY UNIT: M/S

SUITE_SERAFIN : READ OF RECORD 7


TIME OF RECORD: 21600.00 S

VARIABLE : HIGHEST VELOCITYM/S
IS IN THE FILE BUT WILL NOT BE READ
RESCUE : WATER DEPTH COMPUTED WITH BATHYMETRY
AND SURFACE ELEVATION
RESCUE : PREVIOUS CALCULATION WITHOUT TRACER
WE FIX IT TO TRAC0

================================================================================
ITERATION 0 TIME: 6 H 0 MIN 0.0000 S ( 21600.0000 S)

BALANCE OF PASSIVE TRACER (UNIT: )
INITIAL QUANTITY OF TRACER: 0.000000

================================================================================
ITERATION 1 TIME: 6 H 0 MIN 1.0000 S ( 21601.0000 S)

---

ADVECTION STEP

---

DIFFUSION-PROPAGATION STEP
EQUNOR (BIEF) : 21 ITERATIONS, RELATIVE PRECISION: 0.9942297E-04

---

DIFFUSION OF TRACERS STEP
GRACJG (BIEF) : SOLUTION X=0 BECAUSE L2-NORM OF B VERY SMALL: 0.000000

BALANCE OF PASSIVE TRACER (UNIT: )

QUANTITY OF TRACER: 0.000000
BOUNDARY 1 FLUX: 0.000000 ( >0 : ENTERING <0 : EXITING )
BOUNDARY 2 FLUX: 0.000000 ( >0 : ENTERING <0 : EXITING )
ABSOLUTE ERROR: 0.000000

CONTROL SECTION NUMBER 1 (NAME Inlet)

DISCHARGE: -0.3376093

CONTROL SECTION NUMBER 2 (NAME Vasca0-1)

DISCHARGE: -0.1209925

CONTROL SECTION NUMBER 3 (NAME Vasca0-2)

DISCHARGE: -0.1520263

CONTROL SECTION NUMBER 4 (NAME Outlet)

DISCHARGE: -0.3023885

---

BALANCE OF WATER VOLUME
VOLUME IN THE DOMAIN : 205110.0 M3
FLUX BOUNDARY 1: -0.3057712 M3/S ( >0 : ENTERING <0 : EXITING )
FLUX BOUNDARY 2: 0.2999996 M3/S ( >0 : ENTERING <0 : EXITING )
RELATIVE ERROR IN VOLUME AT T = 0.2160E+05 S : 0.8412113E-02

...i add PRESCRIBED TRACERS VALUES but the tracer doesn't enter in my domain. What is the problem???

Best regards.

Hello,

We can not identify the problem only by reading the listing you've posted. However, it seems that you did not introduce properly the tracer into the domain.
There are several available possibilities to take into account the tracer transport. The easiest way is the use of keywords NUMBER OF TRACERS , NAMES OF THE TRACERS, DENSITY EFFECTS, INITIAL VALUES OF TRACERS etc.

I invite you to see section 8 of the user manual in which all the available possibilities are explained.

With my best regards

Riadh Ata

Hi
Did you change the type of boundary condition for tracer in the BC file?
Regards

Hi Coulet,
yes. I use a PREVIOUS COMPUTATION FILE, without tracer, and introduce it for the new simulation.

I add my simulation's file.

Best regards.

Hi,
i understanded my problem. I changed my BC file, in particular, settings of inlet nodes.

Thanks.