Unsteady, laminar flow simulations using the nonlinear disturbance equations

R. P. Hansen, L. N. Long, P. J. Morris

Research output: Contribution to conferencePaperpeer-review

5 Scopus citations


The results of numerical simulations using the Nonlinear Disturbance Equations (NLDE) for viscous test cases in laminar flow are presented. The NLDE are implemented in a two-dimensional, finite volume code to test the algorithm's properties for viscous, wall-bounded flows. Testing focused on the accuracy of unsteady phenomena. An overview of the method, details on the implementation of boundary conditions, and results for a benchmark scattering problem and viscous flow over a circular cylinder are presented. The results show this method converges to a time accurate periodic condition using a variety of inputs for the mean flow field, and under some circumstances may converge substantially faster to the periodic state compared to the same code using a standard Navier-Stokes formulation.

Original languageEnglish (US)
StatePublished - 2000
Event6th Aeroacoustics Conference and Exhibit, 2000 - Lahaina, HI, United States
Duration: Jun 12 2000Jun 14 2000


Other6th Aeroacoustics Conference and Exhibit, 2000
Country/TerritoryUnited States
CityLahaina, HI

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Acoustics and Ultrasonics


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