I know the Zukauskas’ correlation for bare tubes bundles, but I’m now looking for a correlation valid for forced convection across finned tubes bundles (staggered and in-line arrangement).
You might also check with Finned Tube Tech in the Tulas area. They used to have the complete Escoa Design Manual available for download. No longer online. However, I think you might need to talk with someone there to get a copy. It's an excellent resource.
Thanks to all who have replied so far. I'll try to put my hands on the stuff mentioned. i've meanwhile gathered a couple of things myself and I'd like to share them with other members.
A website with a wealth of information on this topic and not only