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Use of time resolved PIV for validating LES/DNS of the turbulent flow within a PCB enclosure model

In this paper an approach to the validation of transient numerical simulations of turbulent flows through the use of time resolved PIV data is presented and applied to the case of turbulent flow within a simplified model of printed circuit board (PCB) enclosure. The comparison between numerical and...

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Bibliographic Details
Published in:Flow, turbulence and combustion turbulence and combustion, 2006-11, Vol.77 (1-4), p.77-95
Main Authors: USERS, G, VERNET, A, FERRE, J. A
Format: Article
Language:English
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Summary:In this paper an approach to the validation of transient numerical simulations of turbulent flows through the use of time resolved PIV data is presented and applied to the case of turbulent flow within a simplified model of printed circuit board (PCB) enclosure. The comparison between numerical and experimental data is not limited here to the time averaged fields, but transient flow structures are also addressed. With this purpose a set of conditionally sampled averages, or cluster averages, are obtained through a Fuzzy Clustering technique. Further, the time history of the flow is analyzed on the base of this set of cluster averages, yielding time sequence relations among them that simplify their interpretation in terms of flow dynamics. In this way, events of alternate vortex shedding have been identified in a selected portion of the flow, and showed to exist in both numerical and experimental sets of data.
ISSN:1386-6184
1573-1987
DOI:10.1007/s10494-006-9038-2