open TELEMAC-MASCARET The mathematically superior suite of solvers

Hello everybody

I was wondering, what would be the best method to include the wave induced bottom friction, which might be an order of magnitude greater than the friction in absence of waves, in Telemac2d simulations.

I have done some simulations using coupled Telemac2d-Tomawac-Sisyphe but still cannot see the effect of waves on the bed shear stress.

I don't know how these variables (in telemac2d or Sisphe) should be set for this case?

LAW OF BOTTOM FRICTION = 2
FRICTION COEFFICIENT = 60

thanks
Reza

Hello,

We are working on these extra physical terms in 3D and are hoping to make these available for the next release of the system. These are increased friction due to waves and vertical mixing due to orbital velocities. Friction terms should be applicable to 2D as well.

Would you have a good test case (analytical etc.) that would demonstrate the adequacy of the development for future validation exercise ?

Would you have any particular article we can check to make sure we also include what you are interested in ?

Thank you.
Sébastien.

Hello

I have been working with Prof. Alan G. Davies on this wave current interaction (WCI) effect, in particular, for Telemac2d simulations.

He has programmed the WCI effect into Sisyphe using either Van Rijn (2007) or Soulsby & Clarke’s (2005) expression to enhance the physical roughness ks which is then fed back into T2D, just as the bed roughness due to dunes etc. can be fed back to T2D using the more recent Telemac releases using

BED ROUGHNESS PREDICTION = YES
in Sisyphe

This WCI effect has been programmed into Sisyphe in our case, but this could be done elsewhere in T2D/Tomawac, i.e. independently of use of Sisyphe.

See attached figure for the method

Thanks
Reza