Currently, time-splitting finite difference or finite element schemes are commonly used in air-pollution modeling. In light of the recent advances in parallel processing, it is crucial to evaluate the performance of these time-splitting schemes on different multiprocessors. In this paper, we use a K-theory diffusion model and a second-order closure model to simulate turbulent diffusion in convective boundary layers. The objective is to assess the "portability" of time-splitting finite element schemes for shared-memory multiprocessors, such as IBM 3090-600J, the Alliant FX/8, the Sequent Symmetry S81 and the Encore Multimax. It was found that significant speed-ups were obtained as a result of parallelization with small programming efforts. Furthermore, our two- and three-dimensional results also suggest that second-order closure models are now computationally affordable and feasible for realistic air pollution modeling.
|Number of pages||11|
|Journal||Atmospheric Environment Part A, General Topics|
|State||Published - Sep 1992|
Bibliographical noteFunding Information:
Acknowledgements--This work was partially supported by the Center for Computational Sciences at the University of Kentucky and the U.S. Army Chemical Research and Development Engineering Center. Computations were performed at the University of Kentucky, Comell National Supercomputing Facility and the Advanced Computing Resources Facility, Mathematics and Computer Sciences Division, Argonne National Laboratory.
- K-theory diffusion model
- Turbulent diffusion
- convective boundary layer
- second-order closure model
- time-splitting finite element
ASJC Scopus subject areas