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Disaggregation Phenomena in Mixing Processes During Laminarturbulent Acceleration in Pipe Flows

Author(s): Zhangjie Peng; Luan Ho; Ian Guymer

Linked Author(s): Ian Guymer

Keywords: No Keywords

Abstract: Temporal concentration profiles resulting from an injected pulse of fluorescent tracer were recorded at multiple locations along a pipe during controlled unsteady flow conditions for flows that changed from laminar (Re=230) to turbulent (Re=18300) conditions. Disaggregation of the tracer cloud was observed during experiments, and the shape of the concentration profiles was found to be affected by injection times during the flow transitions. Further experimental investigation to elucidate the cause of disaggregation of dye involves developing a 2D LIF system at 4 sites along the pipe and measuring the cross-sectional tracer concentration profiles simultaneously under unsteady flow conditions.


Year: 2022

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