Segmented domain decomposition multigrid solutions for two and three-dimensional viscous flows
- Univ. of Cincinnati, OH (United States). Dept. of Aerospace Engineering and Engineering Mechanics
Several viscous incompressible two and three-dimensional flows with strong inviscid interaction and/or axial flow reversal are considered with a segmented domain decomposition multigrid (SDDMG) procedure. Specific examples include the laminar flow recirculation in a trough geometry and in a three-dimensional step channel. For the latter case, there are multiple and three-dimensional recirculation zones. A pressure-based form of flux-vector splitting is applied to the Navier-Stokes equations, which are represented by an implicit, lowest-order reduced Navier-Stokes (RNS) system and a purely diffusive, higher-order, deferred-corrector. A trapezoidal or box-like form of discretization insures that all mass conservation properties are satisfied at interfacial and outflow boundaries, even for this primitive-variable non-staggered grid formulation. The segmented domain strategy is adapted herein for three-dimensional flows and is extended to allow for disjoint subdomains that do not share a common boundary.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 143851
- Journal Information:
- Journal of Fluids Engineering, Vol. 115, Issue 4; Other Information: PBD: Dec 1993
- Country of Publication:
- United States
- Language:
- English
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