Dear Rahul

Thanks a lot for the feedbacks.

yet, I still have a problem excuting the 1-way (one way) FSI.

the concept of this method is two export the load ( force on the blade surface) from fluent to transient structural so we can plot the displacement per time.

I tried to create the data transfer (one data transfer) - force from fluent side -side1- to target transient structural -side2).

but I could not plot the displacement as I could not find the function to do.

I tried top dit via the external data transfer but because the number of the data point it could be impossible to do it so the coupling system is the only option.

please advise