When a stream of hard solid particles impacts a surface of a metal, material is removed. This phenomenon, called generally erosion, has been a problem in many industrial operations through the years.

Some of the most severe situations where erosion has been reported are: gas turbines, coal gasification, liquification and burning, helicopters and aircraft, power recovery, fluidized bed processes, catalytic cracking of oil processes, oil drilling, sand blasting and slurry transport.

The process of erosion involves the particles, the eroding surface and usually the fluid which entrains the particles. One of Dr Nesic's erosion studies is given below, more may be found in the list of publications.

Erosion in Disturbed Liquid/Particle Pipe Flow: Effects of Flow Geometry and Particle Surface Roughness