Journal article

An axis treatment for flow equations in cylindrical coordinates based on parity conditions

RD Sandberg

Computers and Fluids | Elsevier | Published : 2011


A novel axis treatment using parity conditions is presented for flow equations in cylindrical coordinates that are represented in azimuthal Fourier modes. The correct parity states of scalars and the velocity vector are derived such that symmetry conditions for each Fourier mode of the respective variable can be determined. These symmetries are then used to construct finite-difference and filter stencils at and near the axis, and an interpolation scheme for the computation of terms premultiplied by 1/. r. A grid convergence study demonstrates that the axis treatment retains the formal accuracy of the spatial discretization scheme employed. Two further test cases are considered for evaluation..

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University of Melbourne Researchers


Awarded by Royal Academy of Engineering/EPSRC

Awarded by Engineering and Physical Sciences Research Council

Funding Acknowledgements

This work was supported by the Royal Academy of Engineering/EPSRC Research fellowship (EP/E504035/1). The author is grateful to Charles Burke for his initial contributions and valuable discussions.