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Título del libro: Quenching Control And Distortion - Proceedings Of The 6th International Quenching And Control Of Distortion Conference, Including The 4th International Distortion Engineering Conference
Título del capítulo: Hydrodynamic behavior of liquid quenchants in the vicinity of quench probes

Autores UNAM:
JOSE BERNARDO HERNANDEZ MORALES; ROBERTO CRUCES RESENDEZ;

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Autores externos:

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Idioma:

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Año de publicación:
2012

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Palabras clave:

CFD simulations; Cylindrical tubes; Heat extraction; Hydrodynamic behavior; Hydrodynamic conditions; Longitudinal axis; Probe geometry; Quench; Quenchants; Streamline; Strong correlation; Velocity field; Water temperatures; Wetting fronts; Cellophane; Cellulose; Computational fluid dynamics; Flow visualization; Hydrodynamics; Liquids; Pressure; Quenching; Velocity; Visualization; Probes

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Resumen:

Heat extraction in quench probes is a complex phenomenon due to the strong correlation between the hydrodynamics of the quench bath and the boiling regimes. In turn, the hydrodynamic behavior in the vicinity of quench probes depends on the probe geometry and the physical properties of the quench bath. Building on previous findings, in this work we report CFD simulations of the pressure and velocity fields, as well as the streamlines, in the vicinity of cylindrical probes of various geometries. In particular, flat-end, conical-end, hemispherical-end and chamfered cylindrical probes were studied. The simulations were carried out for probes located concentrically in a cylindrical tube with water flowing parallel to the probe longitudinal axis. The system was assumed to be isothermal in order to separate the hydrodynamic from the thermal effects. To validate the model, cellophane ribbons were attached to the probe end in order to trace the streamlines near that region; the cellophane position was compared to the computed streamlines. Previously, the optimum water temperature required to obtain a faithful visualization using the ribbons was determined. From the simulations, it was concluded that the conical-end cylindrical probe generates hydrodynamic conditions particularly suitable for estimating the heat transfer boundary condition at the probe-liquid interphase as well as for studies on wetting front kinematics. Copyright © 2012 ASM International® All rights reserved.

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Entidades citadas de la UNAM:

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Fuente:


ISBN:
1615039805
Editorial:

Tipo de producto:
Conference Paper