Adaptive Mesh Refinement for Fluid-Structure Interaction Simulations

Abstract

This paper introduces an adaptive mesh refinement approach for solving fluid-structure interaction problems. A high-order partitioned approach is applied to couple the fluid and the structural subsystems, where the fluid subsystem is discretized using a discontinuous Galerkin finite-element method, while the structural solver uses a continuous Galerkin discretization. The space-time mesh of the fluid subsystem is adapted using a goal-oriented approach based on the coupled adjoint. Error estimates for unsteady outputs are evaluated using an adjoint-weighted residual after calculating the unsteady adjoint of the coupled system. The benefits of adaptive meshing are demonstrated on fluid and structural outputs of interest evaluated for a two-dimensional pitching-plunging airfoil in a high-Reynolds number flow and a cantilever beam in a laminar flow.

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Document Details

Document Type
Technical Report
Publication Date
Jan 11, 2021
Accession Number
AD1147663

Entities

People

  • Carlos E. S. Cesnik
  • Krzysztof Fidkowski
  • Vivek Ojha

Organizations

  • University of Michigan

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aeroelasticity
  • Air Force
  • Air Force Research Laboratories
  • Cantilever Beams
  • Computational Fluid Dynamics
  • Computational Science
  • Differential Equations
  • Engineering
  • Equations
  • Equations Of Motion
  • Finite Element Analysis
  • Fluid Dynamics
  • Fluid Flow
  • Laminar Flow
  • Mach Number
  • Mechanics
  • Momentum
  • Navier Stokes Equations
  • Reynolds Number
  • Simulations
  • Steady State

Fields of Study

  • Physics

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Computational Fluid Dynamics (CFD)
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)

Technology Areas

  • Space