Decrease of Nozzle Clogging through Fluid Flow Control
| Autor: | José de Jesús Barreto, Maria Guadalupe González-Solórzano, Enif Gutierrez, Rodolfo D. Morales, Saul Garcia-Hernandez |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
lcsh:TN1-997
Materials science CFD modeling Internal flow Nozzle 0211 other engineering and technologies Metals and Alloys 02 engineering and technology Mechanics 021001 nanoscience & nanotechnology Boundary layer thickness physical modeling Continuous casting Clogging Nozzle clogging Fluid dynamics boundary layer thickness Deposition (phase transition) General Materials Science Boundary value problem 0210 nano-technology lcsh:Mining engineering. Metallurgy 021102 mining & metallurgy |
| Zdroj: | Metals, Vol 10, Iss 1420, p 1420 (2020) Metals Volume 10 Issue 11 |
| ISSN: | 2075-4701 |
| Popis: | Decreasing the clogging deposition rate of alumina inclusions in continuous casting nozzles is possible through three simultaneous measures: Flow modification, use of raw materials with low impurities contents, and smoothed internal surfaces. The control of the internal flow consists on avoiding dead regions and developing symmetric patterns. A mathematical model performed tests of the feasibility of these measures. The adherence of inclusions to the nozzle wall, using this model, employs a boundary condition based on the thickness of the sublaminar boundary instead of the conventional &ldquo trap&rdquo boundary condition. The use of the general boundary condition yields deposition rates that are unaffected by the inclusion size. The proposed boundary condition discriminates against the clogging deposition rate through the particle sizes. Plant trials complemented with water modeling, using these nozzles, proved that the present approach could considerably decrease the clogging occurrence. |
| Databáze: | OpenAIRE |
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