Computation of Low Speed Viscous Flows with Heat Addition,
Abstract
The use of implicit time-dependent schemes for the numerical solution of low speed, low Reynolds number flows with heat addition is investigated. Stability analyses show that the errors introduced by approximate factorization give rise to instability at Reynolds numbers around 100. Specifically, it is the cross-derivative errors between the viscous and inviscid terms that cause problems. When exact inversion techniques are used, the system becomes strongly stable and numerical experiments show rapid convergence. Comparisons of outflow boundary conditions show that viscous and inviscid formulations give identical results over a wide range of Reynolds numbers when buoyancy is omitted, but with buoyance present the inviscid boundary conditions are unstable. Flowfield results for a range of low Reynolds conditions with and without buoyancy are given to show the manner in which the flowfield changes as these physical parameters are varied.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1986
- Accession Number
- ADA194017
Entities
People
- Ashvin Hosangadi
- Charles L. Merkle
Organizations
- Pennsylvania State University