Determination of heterogeneities in a scraped surface heat exchanger using electrochemical sensors

Autor:	Francine Fayolle, Jack Legrand, Jérôme Mabit
Rok vydání:	2005
Předmět:	Flow visualization Dynamic scraped surface heat exchanger Chemistry General Chemical Engineering Flow (psychology) Mineralogy Reynolds number Mechanics Physics::Fluid Dynamics Shear (sheet metal) Viscosity symbols.namesake Heat exchanger Materials Chemistry Electrochemistry symbols Taylor number
Zdroj:	Journal of Applied Electrochemistry. 35:487-498
ISSN:	1572-8838 0021-891X
Popis:	An experimental investigation of a scaled-down model of an industrial exchanger, using an electrochemical technique, was undertaken in order to show the presence of hydrodynamic heterogeneities at low axial Reynolds number. Heterogeneities were revealed in the bowls with respect to the generalised Taylor number as the result of the perturbations added to the flow by blade rotation at both ends of the exchanger. Shear heterogeneities associated to flow visualisations were correlated to temperature heterogeneities observed in the bowls. Shear fluctuations were revealed in the scraped part describing two distinctive zones at low rotation speed caused by varying viscosity in the flow field. A complex spiral flow was observed by flow visualisation characterising a mass transfer evolution comprised between these two distinctive zones at low Taylor number.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b2b119ee595e3313be9cbdb0bfb60c37 https://doi.org/10.1007/s10800-004-8343-5 Zobrazit plný text záznamu Plný text ve formátu PDF