open TELEMAC-MASCARET The mathematically superior suite of solvers

Dear All,

I am sure the facility of drying & wetting is there in Telemac-2D but can't seem to figure out how to switch this on.

Can some one let me know ?

Thanks,
Sumit

Hello,

TIDAL FLATS : YES
OPTION FOR THE TREATMENT OF TIDAL FLATS : 1

and to have strictly positive depths, but a little more expensive :

TREATMENT OF NEGATIVE DEPTHS : 2 (which implies other modifications of keywords but the program will tell you)


JMH

Hi Sumit,
yes sure, you can use :
'BANCS DECOUVRANTS' (french) or 'TIDAL FLATS'
Please take a look the tests: "bol_parabolique" (this is an interesting test of a water body sloshing in a parabolic bowl, with analytical solution proposed by Thacker, 1981) and the classical "malpasset" validation test.

best

pablo

hi,

I have a question regarding Wetting and Drying :

Is it possible to introduce a maximum water depth for wich I consider that the domain becomes dry, for example nodes with calculated water depth of 10 cm or less are dry?

As far as I know, Telemac2d considers that dry nodes are those with negative depth.

Kind Regards
FEZAI

Hello,

As opposed to many (if not all) other scientific and industrial codes, TELEMAC has a precise and conservative calculation of water depth, which make those tests on minimum/maximum water depth irrelevant. Many many years of experience working with unstructured mesh and a lot of efforts went into these developments and in particular for the past few years in TELEMAC-3D before going open sources.

Considering those tests as a definition for wetting/drying results in the removal from or addition to your tidal prism of large quantities of water (and associated pollutants/sediments/fresh water/heat) for large estuaries, this is unacceptable in most commercial applications. For instance, say you are modelling heat discharges. What do you do with the heat content in the water that would remain on your "dry" slope ? It would not be practical to just make it disappear or put it back in when the tide comes back ...

... so a warm welcome to the TELEMAC system, the mathematically superior suite of solver ...

Hope this helps.

Sébastien.

Hi

As a complement for Sebastian's answer, and in addition to the good properties of the Telemac2D/3D main kernel (Finite elements) which were evoked by Sebastien, Telemac2D finite volumes kernel gives a wetting and drying algorithm that guarantees the positivity of water depth and the conservation of momentum.
These properties ensure the conservation of water mass and momentum which are part of major expectations of a hydraulic code users.

Kind regards
Riadh