A document discusses work that obtains a low-dimensional model that captures both temporal and spatial flow by constructing spatial and temporal four-mode models for two classic flow problems. The models are based on the proper orthogonal decomposition at two reference Reynolds numbers. Model predictions are made at an intermediate Reynolds number and compared with direct numerical simulation results at the new Reynolds number.

This work was done by Virginia Kalb of Goddard Space Flight Center.

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NASA Tech Briefs Magazine

This article first appeared in the December, 2008 issue of NASA Tech Briefs Magazine.

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