Properties of blood cells and their interaction determine their distribution in flow. Itis observed experimentally that erythrocytes migrate to the flow axis, platelets to thevessel wall, and leucocytes roll along the vessel wall. In this work, a three-dimensionalmodel based on Dissipative Particle Dynamics method and a new hybrid (discrete-continuous)model for blood cells is used to study the interaction of erythrocytes with platelets andleucocytes in flow. Erythrocytes are modelled as elastic highly deformable membranes,while platelets and leucocytes as elastic membranes with their shape close to a sphere.Separation of erythrocytes and platelets in flow is shown for different values ofhematocrit. Erythrocyte and platelet distributions are in a good qualitative agreementwith the existing experimental results. Migration of leucocyte to the vessel wall and itsrolling along the wall is observed.
