Accession Number : ADA130194

Title :   Computation of Three-Dimensional Flows in Ducts of Varying Cross Sections.

Descriptive Note : Summary rept. no. 1, 15 Jun 81-15 Jan 83,


Personal Author(s) : Patankar,Suhas V

PDF Url : ADA130194

Report Date : May 1983

Pagination or Media Count : 72

Abstract : A calculation procedure is developed for the three-dimensional flow in ducts of varying cross section. The procedure is of the fully parabolic variety; i.e., the solution for the whole duct is obtained by a marching scheme that proceeds from the upstream end to the downstream region solving the flow over one cross section at each marching step. The procedure for each cross section is based on the finite element method of Baliga and Patankar. The report describes a major improvement incorporated in the method and some examples of the use of the method. The adaptation of the method for a marching procedure for duct flows is also described. Among the examples presented as test problems are the developing flows: in a square duct, over a rod bundle, in a square diffuser, and in an elliptic duct of varying cross-sectional shape. All numerical solutions are shown to be in satisfactory agreement with exact solutions and/or other available solutions and experimental data. (Author)

Descriptors :   *Numerical methods and procedures, *Computations, *Three dimensional flow, *Ducts, Cross sections, Variations, Fluid flow, Problem solving, Finite element analysis, Mathematical prediction, Two dimensional flow, Differential equations, Shape, Bundles, Rods, Diffusers

Subject Categories : Numerical Mathematics
      Pumps, Filters, Pipes, Tubing, Fittings & Vlvs
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE