Numerical simulation of fiber orientation distribution in round turbulent jet of fiber suspension

► The fibers with high aspect ratio tend much easier to align with the flow direction. ► Fiber orientation distribution is not sensitive to fiber aspect ratio when fiber aspect ratio is larger than 5. ► Fiber density has no obvious influence on the fiber orientation distribution. ► The randomizing effect of turbulence is insignificant in the regions near outside and jet core and is significant in the region between outside and jet core. The randomizing effect increases with the increasing of the distance from the jet exit. ► Different components of fiber orientation tensor show a similar distribution pattern.