dorsal/arxiv
View SchemaQuantifying microbubble clustering in turbulent flow from single-point measurements
| Authors | Enrico Calzavarini, Thomas H. van den Berg, Federico Toschi, Detlef Lohse |
|---|---|
| Categories | |
| ArXiv ID | physics/0607255 |
| URL | https://arxiv.org/abs/physics/0607255 |
| DOI | 10.1063/1.2911036 |
| Journal | Phys. Fluids 20, 040702 (2008) |
Abstract
Single-point hot-wire measurements in the bulk of a turbulent channel have been performed in order to detect and quantify the phenomenon of preferential bubble accumulation. We show that statistical analysis of the bubble-probe colliding-times series can give a robust method for investigation of clustering in the bulk regions of a turbulent flow where, due to the opacity of the flow, no imaging technique can be employed. We demonstrate that micro-bubbles (radius R_0 ~ 0.1 mm) in a developed turbulent flow, where the Kolmogorov length-scale is, eta ~ R_0, display preferential concentration in small scale structures with a typical statistical signature ranging from the dissipative range, O(eta), up to the low inertial range, O(100 eta). A comparison with Eulerian-Lagrangian numeri- cal simulations is also presented to further support our proposed way to characterize clustering from temporal time series at a fixed position.
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"abstract": "Single-point hot-wire measurements in the bulk of a turbulent channel have\nbeen performed in order to detect and quantify the phenomenon of preferential\nbubble accumulation. We show that statistical analysis of the bubble-probe\ncolliding-times series can give a robust method for investigation of clustering\nin the bulk regions of a turbulent flow where, due to the opacity of the flow,\nno imaging technique can be employed. We demonstrate that micro-bubbles (radius\nR_0 ~ 0.1 mm) in a developed turbulent flow, where the Kolmogorov length-scale\nis, eta ~ R_0, display preferential concentration in small scale structures\nwith a typical statistical signature ranging from the dissipative range,\nO(eta), up to the low inertial range, O(100 eta). A comparison with\nEulerian-Lagrangian numeri- cal simulations is also presented to further\nsupport our proposed way to characterize clustering from temporal time series\nat a fixed position.",
"arxiv_id": "physics/0607255",
"authors": [
"Enrico Calzavarini",
"Thomas H. van den Berg",
"Federico Toschi",
"Detlef Lohse"
],
"categories": [
"physics.flu-dyn",
"nlin.CD"
],
"doi": "10.1063/1.2911036",
"journal_ref": "Phys. Fluids 20, 040702 (2008)",
"title": "Quantifying microbubble clustering in turbulent flow from single-point measurements",
"url": "https://arxiv.org/abs/physics/0607255"
},
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