Reconstruction Of A Three-dimensional
Bubble Surface From High-speed Orthogonal
Imaging Of Dilute Bubbly Flow
Author(s)
M. Honkanen
Abstract
This paper presents image analysis algorithms to reconstruct a three-dimensional
gas bubble surface from the time series of two orthogonal projections and to also
recognize bubble outlines when the bubbles are partly overlapping in the image.
Overlapping bubble images raise a large problem for three-dimensional,
tomographic imaging of bubbly flows. Here, a novel approach to recognize the
outlines of irregularly-shaped, overlapping bubbles based on the overlapping
object recognition algorithm is presented.
The main objective is to investigate the accuracy of a back-light imaging
technique to measure bubble properties from a) a single projection or b) from
two, orthogonal projections. The time series data of the bubble surface area,
volume and orientation, location, velocity and trajectory direction is obtained.
Temporal fluctuations in the measured bubble volume reveal the measurement
accuracy in the case of a bubble swarm rising from a single orifice.
Keywords: image analysis, three-dimensional imaging, high-speed imaging,
bubble sizing, overlapping object recognition, optical tomography.
Keywords
image analysis, three-dimensional imaging, high-speed imaging,
bubble sizing, overlapping object recognition, optical tomography
Related Book
Other papers in this volume
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