In what applications can we see fluid mechanics and chemistry overlap, (for the purpose of potential research collaboration in engineering or applied science)?
There is an overlap (or application) of the fluid mechanics in chemical engineering. For example, we can mention the flow in chemical engineering equipment, such as pumps and compressors, manufacture of lead shot, pressure drop in a packed-bed reactor, filtration, fluidization, etc.
The fluid mechanics field also has application on the drug delivery.
Clearly in chromatography, where a mobile phase carries some substance to be analysed/separated/..., typically in a porous medium. This substance, the "analyte", have specific, i.e., chemical, interactions with the medium. This specificity is at the basis of the chromatography techniques.
You thus have both fluid dynamics and chemistry involved.
In these two recent references, you'll find examples of schemes to simulate this challenging overlap:
Accounting for adsorption and desorption in lattice Boltzmann simulations
Levesque et al., Phys. Rev. E 88, 013308 (2013)
How Microscopic Characteristics of the Adsorption Kinetics Impact Macroscale Transport in Chromatographic Beds
Hlushkou et al., J. Phys. Chem. C 117, 22974 (2013)
Also reactive transport in geological media, where the fluid carries multiple aqueous species which can react with each other in the bulk fluid or with solid walls consisting of different minerals, leading to dissolution or precipitation of the solid phase.
Solvent extraction processes fluid dynamics plays an important role for design of the appropriate mass transfer equipment as well as affecting the parameters of hydrodynamics during operation of the equipment.
All of the industrial reactors have a certain hydraulic characteristics which interact with reaction chemistry affecting yield, selectivity efficiency etc.