IGA-BEM for lifting flows

S. Chouliaras, P. Kaklis, C. G. Politis, A. Ginnis, K. V. Kostas

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Abstract

Combining Iso-Geometric analysis (IGA) with Boundary Element Methods (BEM) for inviscid lifting flows imposes a number of difficulties. Firstly, an IGABEM collocation scheme has to take into account the tangent-plane discontinuity occurring along the trailing edge (TE). More important, the scheme has to handle the non-linear Kutta condition, securing continuity of the normal velocity and pressure through the a-priori unknown wake, a force-free boundary surface emanating from TE.

In this presentation we shall review the status of our work towards developing a pair of IGABEM collocation schemes for computing steady lifting flows around 2D and 3D bodies , e.g., hydrofoils, marine propellers; [1,2]. In the latter case, the ansatz functions are inherited from T-spline representations which are free from singularities occurring, e.g., at the tip of a propeller blade, when NURBS are used.

REFERENCES
[1] Kostas, K.V., Ginnis, A.-A. I., Politis, C.G., Kaklis, P.D, “Shape-optimization of 2D hydrofoils using an Isogeometric BEM solver”, Computer-Aided Design, vol. 82, pp. 79-87, (2017).
[2] Chouliaras, S.P., Kaklis, P.D., Ginnis, A.-A.I., Kostas, K.V., Politis, C.G., “An IGA-BEM method for the open-water marine propeller flow problem”, International Conference on Isogeometric Analysis, Pavia (IT), 11-13 September 2017.
Original languageEnglish
Pages1-23
Number of pages22
Publication statusPublished - 27 Jul 2018
Event13th World Congress in Computational Mechanics : Symposium to Honor Professor Thomas J.R. Hughes on his 75th Birthday [invitation only] - New York City, United States
Duration: 27 Jul 201827 Jul 2018
Conference number: 101
http://www.wccm2018.org/T_100

Conference

Conference13th World Congress in Computational Mechanics
Country/TerritoryUnited States
CityNew York City
Period27/07/1827/07/18
Internet address

Keywords

  • computational mechanics
  • fluid mechanics
  • propeller blades
  • propulsion

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