Assessment of experimental optical techniques for characterizing heat transfer using numerical simulations

López Juste, Gregorio y Fajardo, P. (2015). Assessment of experimental optical techniques for characterizing heat transfer using numerical simulations. "Engineering Applications of Computational Fluid Mechanics", v. 9 (n. 1); pp. 84-98. ISSN 1994-2060. https://doi.org/10.1080/19942060.2015.1004812.

Descripción

Título: Assessment of experimental optical techniques for characterizing heat transfer using numerical simulations
Autor/es:
  • López Juste, Gregorio
  • Fajardo, P.
Tipo de Documento: Artículo
Título de Revista/Publicación: Engineering Applications of Computational Fluid Mechanics
Fecha: 2015
Volumen: 9
Materias:
Escuela: E.T.S. de Ingeniería Aeronáutica y del Espacio (UPM)
Departamento: Mecánica de Fluidos y Propulsión Aeroespacial
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

This manuscript addresses the application of numerical simulations for assessing the error in the measurement of the bulk temperature along the laser beam of a 3D flow using a 2D Moiré deflectometry analysis. To analyze the effect of different flow parameters on the error, a 3D computational model of an experimental system was developed. The simulated domain represents the well-known solution of the backward facing step in a rectangular channel but includes a hot-plate at the bottom of the step to enhance the heat transfer effects. The geometry resembles that found in a general heat exchanger. The difference between the computed bulk temperature of the flow and the average temperature obtained via the 2D Moiré is analytically evaluated for various assumed general temperature profiles; the numerically computed profiles of temperature indicates that the error decreases with the channel aspect ratio. The use of CFD enables the determination of the flow topology and thus an evaluation of the 3D flow behavior that will cause the measurement error. A parametric study was performed for different flow conditions, namely, the aspect ratio of the channel, the inflow conditions (flow velocity or Reynolds number), and the temperature of the hot wall. The results indicate that the Moiré technique is suitable for evaluating the bulk temperature in typical heat exchange devices and flow conditions.

Más información

ID de Registro: 44781
Identificador DC: http://oa.upm.es/44781/
Identificador OAI: oai:oa.upm.es:44781
Identificador DOI [BETA]: 10.1080/19942060.2015.1004812
URL Oficial: http://www.tandfonline.com/doi/abs/10.1080/19942060.2015.1004812
Depositado por: Memoria Investigacion
Depositado el: 17 Mar 2017 13:24
Ultima Modificación: 17 Mar 2017 13:24
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