Complex sentence: Particles are known to accumulate in regions of high shear and low vorticity (such as turbulent boundary layers) and also are known to migrate down turbulence intensity gradients (known as turbophoresis).
Split into simpler sentences: Particles are known to accumulate in regions of high shear and low vorticity (such as turbulent boundary layers). Moreover, particles are known to migrate down turbulence intensity gradients (this process is known as turbophoresis).