It is a well-known phenomenon that break-release, particle size, and size distribution of wheat milling are functions of machine operational parameters and grain properties. Due to the non-uniform characteristics and properties of wheat kernels, the kernel physical and mechanical properties affect the size reduction process. This research was the first to test the functionality of the discrete element method (DEM) to simulate the 1 st break wheat roller milling process. DEM models of 1 st break wheat milling were developed by incorporating the bonded particle model along with the spherical-shaped and kernel-shaped particle models. The models simulated hard red winter (HRW) wheat milling at 12%, 14%, and 16% moisture content and was validated using lab scale milling trials. The spherical-shaped approach simulated the size reduction of a

ABSTRACT. The most commonly used method for particle size analysis of wheat flour in the grain industry is a sieve shaker following either the ASABE or AACC standard. This study involved the determination of mean particle size of flour from two different classes of wheat, hard red winter (HRW) and soft white (SW), at sieving times of 8, 10, 12, 14, 16, and 18