1 Introduction
The purpose of this note is to document the development of new pressure-velocity solvers in FLOW-3Dr. In the following section, new solvers are described ¯rst followed by a section of sample problems where typical simulations were performed to illustrate the application of these new solvers. Two appendices are added to describe in detail the general minimum residual (GMRES) and generalized conjugate gradient (GCG) algorithms used in the new solvers.