On the Resolution of Critical Flow Regions in Inviscid Linear And Nonlinear Instability Calculations

Theofilis, Vassilios (1998). On the Resolution of Critical Flow Regions in Inviscid Linear And Nonlinear Instability Calculations. "Journal of Engineering Mathematics", v. 34 (n. 1-2); pp. 111-129. ISSN 0022-0833. https://doi.org/10.1023/A:1004366529352.

Descripción

Título: On the Resolution of Critical Flow Regions in Inviscid Linear And Nonlinear Instability Calculations
Autor/es:
  • Theofilis, Vassilios
Tipo de Documento: Artículo
Título de Revista/Publicación: Journal of Engineering Mathematics
Fecha: 1998
Volumen: 34
Materias:
Escuela: E.T.S.I. Aeronáuticos (UPM) [antigua denominación]
Departamento: Motopropulsión y Termofluidodinámica [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

Texto completo

[img]
Vista Previa
PDF (Document Portable Format) - Se necesita un visor de ficheros PDF, como GSview, Xpdf o Adobe Acrobat Reader
Descargar (1MB) | Vista Previa

Resumen

Numerical methods for tackling the inviscid instability problem are discussed. Convergence is demon- strated to be a necessary, but not a sufficient condition for accuracy. Inviscid flow physics set requirements regarding grid-point distribution in order for physically accurate results to be obtained. These requirements are relevant to the viscous problem also and are shown to be related to the resolution of the critical layers. In this respect, high-resolution nonlinear calculations based on the inviscid initial-boundary-value problem are presented for a model shear-layer flow, aiming at identification of the regions that require attention in the course of high-Reynolds-number viscous calculations. The results bear a remarkable resemblance with those pertinent to viscous flow, with a cascade of high-shear regions being shed towards the vortex-core centre as time progresses. In parallel, numerical instability related to the finite-time singularity of the nonlinear equations solved globally contaminates and eventually destroys the simulations, irrespective of resolution.

Más información

ID de Registro: 10441
Identificador DC: http://oa.upm.es/10441/
Identificador OAI: oai:oa.upm.es:10441
Identificador DOI: 10.1023/A:1004366529352
URL Oficial: http://www.springerlink.com/content/xw257677378p3302/
Depositado por: Memoria Investigacion
Depositado el: 05 Mar 2012 11:49
Ultima Modificación: 20 Abr 2016 18:39
  • Open Access
  • Open Access
  • Sherpa-Romeo
    Compruebe si la revista anglosajona en la que ha publicado un artículo permite también su publicación en abierto.
  • Dulcinea
    Compruebe si la revista española en la que ha publicado un artículo permite también su publicación en abierto.
  • Recolecta
  • e-ciencia
  • Observatorio I+D+i UPM
  • OpenCourseWare UPM