NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
Calculations of steady and transient channel flows with a time-accurate L-U factorization schemeCalculations of steady and unsteady, transonic, turbulent channel flows with a time accurate, lower-upper (L-U) factorization scheme are presented. The L-U factorization scheme is formally second-order accurate in time and space, and it is an extension of the steady state flow solver (RPLUS) used extensively to solve compressible flows. A time discretization method and the implementation of a consistent boundary condition specific to the L-U factorization scheme are also presented. The turbulence is described by the Baldwin-Lomax algebraic turbulence model. The present L-U scheme yields stable numerical results with the use of much smaller artificial dissipations than those used in the previous steady flow solver for steady and unsteady channel flows. The capability to solve time dependent flows is shown by solving very weakly excited and strongly excited, forced oscillatory, channel flows.
Document ID
19910021154
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Kim, S.-W. (Texas Univ. Arlington, TX, United States)
Date Acquired
September 6, 2013
Publication Date
August 1, 1991
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
E-6018
NAS 1.26:187071
NASA-CR-187071
Accession Number
91N30468
Funding Number(s)
CONTRACT_GRANT: NCC3-180
PROJECT: RTOP 505-62-52
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available