open TELEMAC-MASCARET The mathematically superior suite of solvers

Hello all,
In the developer's version of the TMS (trunk for v7p2), a correction of the subroutine(s) solving bedload has been pushed. This modification aims at improve the numerical results where wetting and drying processes are present.
Together with this, a new keyword is proposed : MINIMUM DEPTH FOR BEDLOAD. The default value for this keyword is 1.0E-2 m (new variable HMIN_BEDLOAD). This value can be modified by the user : as a guideline and after some discussions and testing, we can suggest a value in the range [2-3]d_50, being d_50 the sediment diameter.
Although this modification is already available in the trunk, a number of verification and validation cases are still underway (additional testing and feedback from the community will be very welcome). It is expected that the definitive version will be included in the official release of the TMS v7.2.

Best wishes,

Pablo

Hello all,

this message is connected to the thread:
A conceptual fault in the positive depths algorithm of Sisyphe?

I would allow myself to formulate three messages:

(1) Assume previous results with Sisyphe concerning wetting and drying due to bed load as falsified, the previous algorithm simply... has not taken these processes into account.

(2) Although I was told that the new development would be tested soon at the institute I work at, please deliver your precious feedback, especially compared to the situations in which the previous algorithm failed. Independent proofs from various sources are always the best.

(3) I hope a thorough, full and formal verification and validation of the new algorithm will be delivered by Sisyphe caretakers. Please take into account, that stating that "it works" because no "castles made of sand" appear on the shores is not enough. The basic numerical properties -- like conservativity -- must be also investigated to (re-?)convince users that Sisyphe is a morphodynamic tool suitable for natural water bodies.

Best regards,
jaj