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THMT-15. Proceedings of the Eighth International Symposium On Turbulence Heat and Mass Transfer
September, 15-18, 2015, Sarajevo, Bosnia and Herzegovina

DOI: 10.1615/ICHMT.2015.THMT-15


ISBN Print: 978-1-56700-427-4

ISBN CD: 978-1-56700-428-8

The near-field flow structure in triple buoyant plumes

pages 167-170
DOI: 10.1615/ICHMT.2015.THMT-15.220
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要約

This paper presents laboratory measurement results on the flow structure in triple buoyant plumes. Two fundamental flow regions, a merging region and a combined region, are clearly identified and a basic flow evolution process is observed, in that the triple plumes gradually incline to each other in the merging region, then achieve a smooth velocity profile in the combined region. The combined height where multiple velocity peaks joint into one, significantly depends on the source spacing ratio (SR). In a smaller SR of 0.2, the combined region can easily establish prior to Z/h=3, which makes the triple plumes behave like a "single" plume. In a larger SR of 1.5, multiple axial velocity peaks are preserved from Z/h=3 to Z/h=9. Under such circumstances, a longer downstream distance, which is beyond Z/h=9, is required for triple plumes to achieve a combined state.

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