Finite element/volume solution to axisymmetric conservation laws
Conservation laws in axisymmetric geometries are discretized for the first time according to the node-pair framework of Selmin [Comput. Methods Appl. Mech. Eng. 102 (1993) 107138]. A relation is found linking the node-pair finite element discretization to the finite volume scheme, opening the way to the use of standard finite volume stabilization techniques and high-resolution schemes in the computation of axisymmetric problems. By construction, the treatment of the axis is naturally built-in inside the basic structural elements of the spatial discretization. Numerical results are presented and compared to the exact solution for scalar advection in a source flow, considering both continuous and discontinuous initial profiles. Numerical simulations of compressible flows include the complex dynamical interaction and propagation of waves in a shock-tube experiment and the steady flow at the exit of under-expanded and sonic nozzles. Numerical results are found to agree fairly well with experimental data, demonstrating the validity of the proposed approach.
conservation laws scalar advection euler equations axisymmetric flows unstructured grids hybrid finite element/volume schemes high-resolution tvd schemes