Open Access

ABSTRACT

A comparison of various basis functions to linear stability of circular jet using MLPG method

Xie Ming-Liang¹

1 The State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology,Wuhan, 430074, China

The International Conference on Computational & Experimental Engineering and Sciences 2010, 14(2), 57-62. https://doi.org/10.3970/icces.2010.014.057

Abstract

Various basis function based on Fourier-Chebyshev Petrov-Galerkin spectral method is described for computation of temporal linear stability in a circular jet. Basis functions presented here are exponentially mapped Chebyshev functions. There is a linear dependence between the components of the vector field according to the perturbation continuum equation. Therefore, there are only two degrees of freedom. According to the principle of permutation and combination, the basis function has three basic forms, i.e., the radial, azimuthal or axial component is free. The results show that three eigenvalues for various cases are consistent, but the basis function in case I is preferable for numerical computation.

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Keywords

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