open TELEMAC-MASCARET The mathematically superior suite of solvers

Hello everybody,

I have a problem, with the configuration with boundary condition.

In the following domain :


i have, considering as in the manual at the point "(0;0)",
in the trigonometric sens : first UV H imposed(enter), second sliping wall, third H imposed (out...), then 4th at the top wall; then (on the left at the top) 5th UV H imposed (enter); then 6 th(on the left following and "under" the 5 th) UV H imposed (enter).

I don't manage to make understand to TELEMAC 2D; that I want the 5th boundary
to have the value 1.8 (which is big because of test).

It behave like it was 0 ??!!

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/
FICHIER DES CONDITIONS AUX LIMITES : MESH-7.cli // cli.txt
FICHIER DE GEOMETRIE : geo
//FICHIER DE REFERENCE : ref
FICHIER DES RESULTATS : res
//FICHIER DES FRONTIERES LIQUIDES : qsl.txt
/

/
PERIODE POUR LES SORTIES GRAPHIQUES = 40 PERIODE DE SORTIE LISTING =10
//TRACEUR = OUI
VARIABLES POUR LES SORTIES GRAPHIQUES = U,V,H,S,T1,B,K,E,D
VARIABLES A IMPRIMER = ' ' // BILAN DE MASSE = VRAI
SUITE DE CALCUL : NON
PAS DE TEMPS = 5 NOMBRE DE PAS DE TEMPS = 4500
BANCS DECOUVRANTS = NON // MASS-LUMPING SUR H : 1.
//FORME DE LA CONVECTION = 1;5;1;2
OPTION DE SUPG = 1;2;1;2
SOLVEUR : 6 PRECISION DU SOLVEUR = 1.E-5




/

---

/ CONDITIONS INITIALES
CONDITIONS INITIALES : 'COTE CONSTANTE'
COTE INITIALE : 0.
/

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/ CONDITIONS AUX LIMITES
/

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/
/
LOI DE FROTTEMENT SUR LE FOND = 3 /strickler
COEFFICIENT DE FROTTEMENT = 40
VITESSES IMPOSEES : 0.075;0.075;1.8
COTES IMPOSEES : 0;0;0;0
/

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/

---

TRACEUR
/

---

NOMBRE DE TRACEURS = 1
NOMS DES TRACEURS = 'SALINITE KG/M3'
ABSCISSES DES SOURCES : 763258
ORDONNEES DES SOURCES : 6252642
DEBITS DES SOURCES : 0.2
//VALEURS DU TRACEUR AUX SOURCES : 1.
VALEURS DES TRACEURS DES SOURCES : 4
//DIFFUSION DES TRACEURS : OUI
//COEFFICIENT DE DIFFUSION DES TRACEURS : 0.00001
//MASS-LUMPING SUR LE TRACEUR : 1.

MASSE VOLUMIQUE DE L'EAU = 1036

//LOI DE FROTTEMENT SUR LE FOND = 3 COEFFICIENT DE FROTTEMENT = 50.
CORIOLIS : OUI
COEFFICIENT DE CORIOLIS = 9.91625E-5

MODELE DE TURBULENCE = 4 //COEFFICIENT DE DIFFUSION DES VITESSES = //1.E-6
/DEBITS IMPOSES = 0.;750. COTES IMPOSEES = 265.;0.
/COTE INITIALE = 265. CONDITIONS INITIALES = 'COTE CONSTANTE'
OPTION POUR LES FRONTIERES LIQUIDES : 2;2;2
//VALIDATION : OUI
DISCRETISATIONS EN ESPACE : 11;11
STOCKAGE DES MATRICES : 3 PRODUIT MATRICE-VECTEUR : 1
/ //
&ETA

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Thanks in advance

Best regards

Hello,

The keywords VITESSES IMPOSEES, etc. are relevant to liquid boundaries, so if you want to have a velocity of 1.8 on the third liquid boundary, you must have :

VITESSES IMPOSEES : value at boundary 1 ; value at boundary 2 ; 1.8

The corresponding points in the boundary conditions file must have a line that begins with :

5 5 5 (H, U, V imposed)

or

4 5 5 (H free, U and V imposed)

and it should work. However you give 3 VITESSES IMPOSEES and 4 COTES IMPOSEES, this is perhaps a mistake. There should be as many as liquid boundaries.

Regards,

JMH

Hello M. HERVOUET,

Do i have to write :

VITESSE IMPOSEES : values at boundary 1 0.075; values ...

Please explain me more.

Thanks a lot in advance.

Best Regard

sobo634

Hi

All those aspects are well documented in the user manual...
Take the time to read it carrefully.

You could also use the Fudaa interface to manage automatically the values of the keywords at the boundaries.

generally, all the boundaries should appear in each keyword realted to boundaries, even the value is not use.

Regards

Hello again M. HERVOUET

Please could you write a small "cas.txt" file, to show

Thanks a lot in advance

Best regard

Sobo634

Hi again

The test case exists for such requirement.

You will find a lot of example taht illustrate those principle

Regards