Estimation of transient wall and flow temperature distributions in a circular duct using an inverse approach

Masouros, SD; Mathioudakis, K

dc.contributor.author	Masouros, SD	en
dc.contributor.author	Mathioudakis, K	en
dc.date.accessioned	2014-03-01T01:26:18Z
dc.date.available	2014-03-01T01:26:18Z
dc.date.issued	2007	en
dc.identifier.issn	0954-4062	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17999
dc.subject	Circular duct	en
dc.subject	Forced convection	en
dc.subject	Heat transfer	en
dc.subject	Inverse	en
dc.subject	Transient	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.other	Confined flow	en
dc.subject.other	Forced convection	en
dc.subject.other	Heat transfer coefficients	en
dc.subject.other	Inverse problems	en
dc.subject.other	Mathematical models	en
dc.subject.other	Optimization	en
dc.subject.other	Turbulent flow	en
dc.subject.other	Unsteady flow	en
dc.subject.other	Duct flow	en
dc.subject.other	Forced convection flow	en
dc.subject.other	Multivariate optimization algorithm	en
dc.subject.other	Thermal model	en
dc.subject.other	Unsteady heat convection	en
dc.subject.other	Ducts	en
dc.subject.other	Confined flow	en
dc.subject.other	Ducts	en
dc.subject.other	Forced convection	en
dc.subject.other	Heat transfer coefficients	en
dc.subject.other	Inverse problems	en
dc.subject.other	Mathematical models	en
dc.subject.other	Optimization	en
dc.subject.other	Turbulent flow	en
dc.subject.other	Unsteady flow	en
dc.title	Estimation of transient wall and flow temperature distributions in a circular duct using an inverse approach	en
heal.type	journalArticle	en
heal.identifier.primary	10.1243/09544062JMES307	en
heal.identifier.secondary	http://dx.doi.org/10.1243/09544062JMES307	en
heal.language	English	en
heal.publicationDate	2007	en
heal.abstract	Inverse methods have become a useful tool for estimating parameters that cannot be measured or calculated directly in engineering applications. Parameters characterizing unsteady heat convection in circular duct flows are associated with numerous uncertainties. This fact renders the inverse approach appropriate for the determination of these parameters. An inverse problem for transient turbulent thermally developing and thermally developed forced-convection flow in a circular duct is formulated and discussed, and a simplified direct thermal model is presented. Parameters of the model are estimated by solving a minimization problem, using temperature data from the wall surface and/ or the flow. A multivariable optimization algorithm is employed for this purpose. Furthermore, a model for the forced-convection heat-transfer coefficient is proposed and its effect on the results is discussed. The validity of the proposed method is assessed using data from two different circular duct flows. The method is shown to provide a good prediction capability in computationally demanding transient heat-data sequences of different duct flows, both in terms of duct and of flow characteristics. Results show that a hyperbolic axial distribution of the forced-convection heat-transfer coefficient in the developing region of the flow is essential for good adaptation of the method to the test data. © IMechE 2007.	en
heal.publisher	PROFESSIONAL ENGINEERING PUBLISHING LTD	en
heal.journalName	Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science	en
dc.identifier.doi	10.1243/09544062JMES307	en
dc.identifier.isi	ISI:000251746200013	en
dc.identifier.volume	221	en
dc.identifier.issue	11	en
dc.identifier.spage	1353	en
dc.identifier.epage	1361	en