McLaury proposed a model for predicting the erosion rate of sand particles in water [423]. The model has primarily been used to simulate erosion rates in slurry erosion. The McLaury erosion rate is determined by:

(12–335)

where
	= empirical constant
	= particle impact velocity
	= Brinell’s hardness number of wall material
	= -0.59 for carbon steel. For other materials the exponent is different.

with

(12–336)

(12–337)

The model constants , , , , and must be determined by an experiment. must be chosen in such a way that the angle functions (Equation 12–336 and Equation 12–337) coincide at , where is the transition angle.

Notes on the McLaury Model

The model constants given above are only valid for a suspension of water and sand. Particle impact velocities are assumed to be in the range of 0 - 10 m/s.