A fixed-grid method for transient simulations of dopant segregation in VGF-RMF growth

► A fixed-grid method has been adopted for simulations of the dopant segregation. ► The Stefan conditions are formulated in source terms in conservation equations. ► The solid interface is tracked implicitly. ► The formation of dopant striations is well reproduced by numerical simulations. ► RMF is found to have a significant impact on the axial mixing of the melt.