Abstract
A new method is shown to provide a solution to the long standing pressure-velocity coupling problem encountered in pressure-based Computational Fluid Dynamics. This problem occurs when the dependent variables are colocated on the computational mesh. A solution was found by requiring that the interpolation equations, used to relate the velocity and density at the control volume faces to the nodal values, be constrained to conserve mass. This is referred to as Mass Constrained Interpolation. It also leads to a strategy for deriving and testing boundary conditions. The method is demonstrated by comparing one-dimensional computational solutions to exact solutions for a wide range of incompressible and compressible flows.
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