Fluid-elastic structure interaction simulation by using ordinary state-based peridynamics and peridynamic differential operator

Yan Gao, Selda Oterkus

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)
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The fluid-structure interaction phenomenon is often encountered in the ocean engineering field. In the present work, a non-local numerical model is developed for the simulations of weakly compressible viscous fluid and elastic structure interactions. The peridynamic theory is adopted for both the structure and fluid modelling. The elastic structure is described by using the ordinary state-based peridynamics, while the fluid is modelled by utilizing the peridynamic differential operator. Furthermore, the updated Lagrangian description is adopted for the fluid including the relative deformation gradient expressed by the peridynamic differential operator. The fluid-structure interface and its normal direction are calculated via the gradient of a colour function, which varies with the fluid motion and structure deformation. Besides, the interaction force exerted from fluid to structure is constrained to be always perpendicular to the moving interface. Hence the fluid motion and structural deformation are predicted simultaneously. The validation of the developed model is conducted through the simulation of a water dam break with a rubber gate. The good agreement between the peridynamic and the experiment results demonstrates the capability of the current model for solving fluid-elastic structure interaction problems.
Original languageEnglish
Pages (from-to)126-142
Number of pages17
JournalEngineering Analysis with Boundary Elements
Early online date28 Sep 2020
Publication statusPublished - 31 Dec 2020


  • ordinary state-based peridynamics
  • peridynamic differential operator
  • non-local
  • fluid-structure interaction
  • dam break

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