open TELEMAC-MASCARET The mathematically superior suite of solvers

Hello,

For some study, I need to perform dispersion simulations in a region where currents and waves interact a lot. Therefore, TELEMAC2D needs to be coupled to TOMAWAC. As this coupling takes a long time to run, I would like to set up a post-computation based on a unique T2D-TOM run, and let T2D read the output file afterwards to solve the transport equation for the tracer(s) (just as SUBIEF2D was doing it in the past).

I do know this is not the right way to do it anymore, but I need to try this option.

At the moment, I managed to let T2D read previous results (U,V,H) in telemac2d.f just before §5 ('DIFFUSION OF THE TRACER') and assign U,V to UCONV,VCONV. Then T2D calls CVDFTR for advection-diffusion. Many input arrays are probably lacking though (as advection/diffusion/propagation for hydro have been deactivated) and the dispersion results are NaN.

How could I let the tracer dispersion in CVDFTR be calculated just knowing U, V and H? (on a paper sheet, this seems trivial, but not numerically...)

Thank you very much in advance,
JBS.

Hello Jean Baptiste

This is complicated to explain in a post of the forum. Lots of things need to be checked before Calling cvdftr.
try first to desactivate advection by using keywords
ADVECTION =FALSE
Then diffusion with keyword
DIFFUSION OF VELOCITY = FALSE
then verify that no force is desactivated (friction, Coriolis, Wind, ...) by forcing FU and FV to 0 after the call of prosou.f

finally you have to check the management of time step and cfl depending on the advection scheme you are using for tracer.

Hope this helps

kind regards
Riadh