Cristin-resultat-ID: 1631123
Sist endret: 12. desember 2018, 15:31
NVI-rapporteringsår: 2018
Vitenskapelig artikkel

3D motion dynamics of axisymmetric bodies falling through water

  • Hagbart Skage Alsos og
  • Odd Magnus Faltinsen


Ocean Engineering
ISSN 0029-8018
e-ISSN 1873-5258
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2018
Volum: 169
Sider: 442 - 456
Open Access


Scopus-ID: 2-s2.0-85054853371

Beskrivelse Beskrivelse


3D motion dynamics of axisymmetric bodies falling through water


A new simplified method for analysis of 3D motion dynamics of axisymmetric slender bodies falling from air through water is presented. Slender-body theory for potential flow of incompressible water is combined with 2D + t theory to account for viscous cross-flow separation in the submerged phase. The effect of flow separation from the upstream end of a pipe plays an important role. Furthermore, asymmetric vortex shedding triggering important 3D motions is considered. The water impact loads are based on strip theory and empirical slamming coefficients together with added mass and buoyancy loads. The theory is validated by comparing numerical analyses with experimental drop tests of pipes performed by Aanesland (1987). Error analyses of the theoretical method are performed and compared with tests to explore the sensitivity to input variations.


Hagbart Skage Alsos

  • Tilknyttet:
    ved Energi og transport ved SINTEF Ocean

Odd Magnus Faltinsen

  • Tilknyttet:
    ved Institutt for marin teknikk ved Norges teknisk-naturvitenskapelige universitet
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