An extension of pseudo-3D vortex particle methods for aeroelastic interactions of thin-walled structures

Chawdhury, Samir; Morgenthal, Guido

doi:10.1016/j.jweia.2020.104391

Cited by 6 publications

(1 citation statement)

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“…Recent progress in the development of discrete vortex methods has particularly concentrated on improvements in the accuracy of numerical results and the high resolution of wake fields [7][8][9][10][11][12][13][14][15][16]. Some of the literature has also focused on the extension of the vortex method, such as solving structural deformations via coupling with the finite element method [17][18][19][20][21]. In vortex methods, vortices already in the fluid can leak into the body owing to random walk, which causes serious damage to the streamlined body surface.…”

Section: Introductionmentioning

confidence: 99%

Conformal Mapping-Based Discrete Vortex Method for Simulating 2-D Flows around Arbitrary Cylinders

Guo

Sun

Zong

et al. 2021

JMSE

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A novel technique based on conformal mapping and the circle theorem has been developed to tackle the boundary penetration issue, in which vortex blobs leak into structures in two-dimensional discrete vortex simulations, as an alternative to the traditional method in which the blobs crossing the boundary are simply removed from the fluid field or reflected back to their mirror-image positions outside the structure. The present algorithm introduces an identical vortex blob outside the body using the mapping method to avoid circulation loss caused by the vortex blob penetrating the body. This can keep the body surface streamlined and guarantees that the total circulation will be constant at any time step. The model was validated using cases of viscous incompressible flow passing elliptic cylinders with various thickness-to-chord ratios at Reynolds numbers greater than Re = 1 × 105. The force and velocity fields revealed that this boundary scheme converged, and the resultant time-averaged surface pressure distributions were all in excellent agreement with wind tunnel tests. Furthermore, a flow around a symmetrical Joukowski foil at Reynolds number Re = 4.62 × 104, without considering the trailing cusp, was investigated, and a close agreement with the experimental data was obtained.

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