open TELEMAC-MASCARET The mathematically superior suite of solvers

Hello everybody

I have been running the coupled TELEMAC2D-TOMAWAC models for a region.
I couldn't find the theoretical basis for wave-current interactions in the documentations. There is a section in Sisyphe, but how about just coupling the wave module, and tide module?

My understanding is: TELEMAC2D should include wave forces resulting from wave radiation stresses computed by TOMAWAC? and perhaps just considering the last computation in TOMAWAC?

I would appreciate any reply or citing any published work in this regard.

thanks

Hello

You can find a wide range of informations in the manual section dedicated to Tomawac at this link www.opentelemac.org/downloads/MANUALS/TO...ide_tomawac_v6p1.pdf.
You can focus specially on the interaction between Telemac2D and Tomawac at section 8.2.7

I hope that it helps

With my best regards

Riadh

Thank you for th eprompt reply

I quoted this from the TOMAWAC manual,

"while TOMAWAC solves the wave action density conservation equation with reference to those current and water depth values and returns to TELEMAC the updated values of the wave driving forces FX and FY acting
on the current."

Doe this mean that, the effect of waves on the bottom shear stress or wave induced bottom friction, which might be an order of magnitude greater, wont be considered in TELEMAC-TOMAWAC coupling? Unless someone couples TELEMAC-TOMAWAC-SISYPHE (even for cases that sediment transport modelling is not the objective)?

Cheers

Hello

No, the effects of bottom friction are already taken into account in the mathematical model of Tomawac. If you see page 20 of the manual, you have the list of all source and sink terms considered in Tomawac. There, you can find the bottom friction induced dissipation (Qbf).

On the other hand, the coupling of Telemac2D-Tomawac-Sysiphe is being implemented and we hope that it will be ready for the next release of the Telemac-Mascaret system.

With my best regards

Riadh ATA

Hi Thanks for the reply

My understanding is that the coupling of Sisphye-Telemac2d-Tomawac is already available in 6.3 vesion. I have done a few simulations which includes coupling of the three models.

In terms of the bottom friction, I meant the bed shear stress in the current model rather than the wave model. The bed shear stress in Telemac2d can be much greater in presence of waves due to wave current interaction.

Cheers

Hi everybody,

Sorry to reactivate the topic. I was wondering how are computed the radiation stress terms due to wave action Sxx, Syy and Sxy. I suppose it is based on the formulation obtained using linear wave theory. Can anyone confirm it ?

Regards,

MP

Hi Marc,

Yes, I confirm that radiation stress terms are computed according to the theoretical linear wave theory (Phillips, 1977).

Regards,
Laurent