CFC-4: Examples of Target Application
Unsteady three-dimensional
viscous flow represents an important class of problems for which accurate methods of
prediction are frequently required. Such applications are almost always complicated
geometrically, may also involve relative motion between component parts, and exist in
virtually all engineering disciplines. Experimental methods of analysis, including
scale-model and full-scale prototype testing, are often not possible due to excessive
cost, model limitations, human safety factors, and time constraints. Mature computational
methods are not always appropriate due to inherent method limitations. Unsteady viscous
flowfields involving vortical wakes, interference effects, moving shocks, and body motion
demand the most advanced computational means available.
Currently, the only high-order method of prediction that is practical for such problems is
the so called Chimera overset grid approach. Many factors provide incentive for adopting
an overset grid approach. A geometrically complex problem can be reduced to a set of
simple components. Arbitrary relative motion between components of multiple body
configurations is accomplished by allowing grid components to move with
six-degrees-of-freedom in response to applied and dynamic loads. Limited memory resources
can be accommodated by problem decomposition into appropriately sized components.
Scalability on parallel compute platforms can be realized through problem decomposition
into components (or groups of components) of approximately equal size.
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