An ALE mesh movement scheme for long-term in-flight ice accretion

M. Fossati, R. A. Khurram, W. G. Habashi

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The rather irregular shapes that glaze ice may grow into while accreting over the surface of an aircraft represent a major difficulty in the numerical simulation of long periods of in-flight icing. There is a constant need for remeshing: a wasteful procedure. In the framework of ALE formulations, a mesh movement scheme is presented, in which frame and elasticity analogies are loosely coupled. The resulting deformed mesh preserves the quality of elements, especially in the near-wall region, where accurate prediction of heat flux and shear stresses is required. The proposed scheme handles mesh deformation in a computationally efficient manner by localizing the mesh deformation. The 2D problem of ice accretion over single and multi-element airfoils is considered here as a numerical experiment. Experimentally measured glaze ice shapes were used to evaluate the performance of the present approach.
LanguageEnglish
Pages958 - 976
Number of pages19
JournalInternational Journal of Numerical Methods in Fluids
Volume68
Issue number8
DOIs
Publication statusPublished - 20 Mar 2012

Fingerprint

Accretion
Mesh Deformation
Ice
Glazes
Mesh
Remeshing
Airfoil
Shear Stress
Heat Flux
Airfoils
Analogy
Aircraft
Heat flux
Elasticity
Shear stress
Irregular
Numerical Experiment
Numerical Simulation
Formulation
Evaluate

Keywords

  • in flight icing
  • ALE
  • mesh movement
  • elasticity
  • mesh quality
  • computational efficiency

Cite this

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abstract = "The rather irregular shapes that glaze ice may grow into while accreting over the surface of an aircraft represent a major difficulty in the numerical simulation of long periods of in-flight icing. There is a constant need for remeshing: a wasteful procedure. In the framework of ALE formulations, a mesh movement scheme is presented, in which frame and elasticity analogies are loosely coupled. The resulting deformed mesh preserves the quality of elements, especially in the near-wall region, where accurate prediction of heat flux and shear stresses is required. The proposed scheme handles mesh deformation in a computationally efficient manner by localizing the mesh deformation. The 2D problem of ice accretion over single and multi-element airfoils is considered here as a numerical experiment. Experimentally measured glaze ice shapes were used to evaluate the performance of the present approach.",
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An ALE mesh movement scheme for long-term in-flight ice accretion. / Fossati, M.; Khurram, R. A.; Habashi, W. G.

In: International Journal of Numerical Methods in Fluids, Vol. 68, No. 8, 20.03.2012, p. 958 - 976.

Research output: Contribution to journalArticle

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