Research Output
Accurate iteration-free mixed-stabilised formulation for laminar incompressible Navier鈥揝tokes: Applications to fluid鈥搒tructure interaction
  Stabilised mixed velocity鈥損ressure formulations are one of the widely-used finite element schemes for computing the numerical solutions of laminar incompressible Navier鈥揝tokes. In these formulations, the Newton鈥揜aphson scheme is employed to solve the nonlinearity in the convection term. One fundamental issue with this approach is the computational cost incurred in the Newton鈥揜aphson iterations at every load/time step. In this paper, we present an iteration-free mixed finite element formulation for incompressible Navier鈥揝tokes that preserves second-order temporal accuracy of the generalised-alpha and related schemes for both velocity and pressure fields. First, we demonstrate the second-order temporal accuracy using numerical convergence studies for an example with a manufactured solution. Later, we assess the accuracy and the computational benefits of the proposed scheme by studying the benchmark example of flow past a fixed circular cylinder. Towards showcasing the applicability of the proposed technique in a wider context, the inf鈥搒up stable P2鈥揚1 pair for the formulation without stabilisation is also considered. Finally, the resulting benefits of using the proposed scheme for fluid鈥搒tructure interaction problems are illustrated using two benchmark examples in fluid-flexible structure interaction.

  • Type:

    Article

  • Date:

    03 July 2020

  • Publication Status:

    Published

  • Publisher

    Elsevier BV

  • DOI:

  • Cross Ref:

    10.1016/j.jfluidstructs.2020.103077

  • ISSN:

    0889-9746

  • Funders:

    Historic Funder (pre-Worktribe)

Citation

麻豆社区

Kadapa, C., Dettmer, W. G., & Peri膰, D. (2020). Accurate iteration-free mixed-stabilised formulation for laminar incompressible Navier鈥揝tokes: Applications to fluid鈥搒tructure interaction. Journal of Fluids and Structures, 97, Article 103077. https://doi.org/10.1016/j.jfluidstructs.2020.103077

Authors

Monthly Views:

Available Documents