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Analysis of the Convective Heat Transfer to Laminar Duct Flow of Supercritical Water
KTH, School of Engineering Sciences (SCI), Physics, Reactor Technology.ORCID iD: 0000-0001-5595-1952
2009 (English)In: Proceedings of theĀ 4th International Symposium on Supercritical Water-Cooled Reactors, 2009Conference paper (Refereed)
Abstract [en]

In this paper an analytical solution has been obtained for the case of laminar flow between two infinite parallel plates at two different temperatures. The existence of the fully-developed flow condition is postulated and thus the problem is reduced to a solution of a set of non-linear ordinary differential equations representing the conservation of mass, energy and momentum. The equations have been solved using Matlab, and employing water property functions based on the IAPWS-IF97 library. The Matlab program has been verified against known analytical solutions for the laminar duct flow of fluid with constant properties and an excellent agreement has been obtained. The solutions of conservation equations give an expression for the over-all heat transfer coefficient in mixed convection. The analysis indicates that the heat transfer coefficient is a very strong function of local properties and flow conditions. The predicted Nusselt number and the convection coefficient are in a reasonably good agreement with existing correlations. More analytical and experimental work is recommended to elucidate the laminar mixed-convection phenomena to supercritical fluids.

Place, publisher, year, edition, pages
National Category
Energy Engineering
Research subject
SRA - Energy
URN: urn:nbn:se:kth:diva-81601OAI: diva2:497658
4th International Symposium on Supercritical Water-Cooled Reactors. Heidelberg, Germany. March 8-11, 2009
QC 20120502Available from: 2012-02-10 Created: 2012-02-10 Last updated: 2012-05-02Bibliographically approved

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