Estimation of Two Error Components in the Numerical Solution to the Problem of Nonisothermal Flow of Polymer Fluid between Two Coaxial Cylinders

A. M. Blokhin, E. A. Kruglova, B. V. Semisalov

Research output: Contribution to journalArticlepeer-review

Abstract

An algorithm for solving a stationary nonlinear problem of a nonisothermal flow of an incompressible viscoelastic polymer fluid between two coaxial cylinders is developed on the basis of Chebyshev approximations and the collocation method. In test calculations, the absence of saturation of the algorithm is shown. A posteriori estimates of two error components in the numerical solution-the error of approximation method and the round-off error-are obtained. The behavior of these components as a function of the number of nodes in the spatial grid of the algorithm and the radius of the inner cylinder is analyzed. The calculations show exponential convergence, stability to rounding errors, and high time efficiency of the algorithm developed.

Original languageEnglish
Pages (from-to)1099-1115
Number of pages17
JournalComputational Mathematics and Mathematical Physics
Volume58
Issue number7
DOIs
Publication statusPublished - 1 Jul 2018

Keywords

  • algorithm without saturation
  • Chebyshev polynomials
  • collocation method
  • error estimates
  • exponential convergence
  • polymer fluid dynamics

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