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Study of the slippage of particle / supercritical CO2 two-phase flow
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Hou, Lei, Sun, Baojiang, Geng, Xueyu , Jiang, Tingxue and Wang, Zhiyuan (2016) Study of the slippage of particle / supercritical CO2 two-phase flow. Journal of Supercritical Fluids . doi:10.1016/j.supflu.2016.09.016
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WRAP_engineering-091016-supflu-d-16-00185r1-accepted_version_open.pdf - Accepted Version - Requires a PDF viewer. Download (922Kb) |
Official URL: http://dx.doi.org/10.1016/j.supflu.2016.09.016
Abstract
In this paper, the slippage velocity and displacement between particles and supercritical CO2 (SC-CO2) were studied to reveal the particle-SC-CO2 two-phase flow behavior. Visualization experiments were performed to directly measure the slippage velocity and displacement. Eight groups of experiments involving various pressures (7.89–10.96 MPa), temperatures (38.6–47.5 °C), particle diameters (0.3–0.85 mm), particle densities (2630 and 3120 kg/m3) and SC-CO2 flow rates (0.920–1.284 m/s) were conducted. The measured particle slippage velocities in the flowing direction were approximately 10.3% of the SC-CO2 flow rate. The measured particle slippage displacements were all at the centimeter level, which indicated that SC-CO2 had a superior particle transporting capability that was similar to those of liquids even if it had a low viscosity that was similar to those of gases. A numerical model was built, and analytic slippage calculations were performed for SC-CO2 for additional analyses. The density of SC-CO2 was found to have a greater influence on the slippage than the viscosity. Moreover, a comparison of the slippage between SC-CO2 and water showed that the particle slippage in water was constant, while the particle slippage in SC-CO2 continually accumulated at an extremely slow rate.
| Item Type: | Journal Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Subjects: | T Technology > TP Chemical technology | ||||||||
| Divisions: | Faculty of Science > Engineering | ||||||||
| Library of Congress Subject Headings (LCSH): | Supercritical fluids | ||||||||
| Journal or Publication Title: | Journal of Supercritical Fluids | ||||||||
| Publisher: | Elsevier | ||||||||
| ISSN: | 0896-8446 | ||||||||
| Official Date: | 28 September 2016 | ||||||||
| Dates: |
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| DOI: | 10.1016/j.supflu.2016.09.016 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||
| Funder: | Guo jia zi ran ke xue ji jin wei yuan hui (China) [National Natural Science Foundation of China] (NSFC) | ||||||||
| Grant number: | U1262202, 5121006 |
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