Numerical stability and heat transfer analyses of supercritical water flowing upward In vertical heated pipes

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dc.contributor.authorEbrahimnia, Elaheh
dc.contributor.examiningcommitteeWang, Bing-Chen ( Mechanical Engineering) Filizadeh, Shaahin ( Electrical & Computer Engineering)en_US
dc.contributor.supervisorChatoorgoon, Vijay ( Mechanical Engineering) Ormiston, Scott (Mechanical Engineering)en_US
dc.date.accessioned2014-03-27T19:56:53Z
dc.date.available2014-03-27T19:56:53Z
dc.date.issued2014-03-27
dc.degree.disciplineMechanical and Manufacturing Engineeringen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.abstractA numerical study is performed to model the 2-D axisymmetric turbulent flow of supercritical water flowing upward in vertical pipes with constant wall heat fluxes, using ANSYS CFX v14.5. This study was aimed to use CFD in analyzing supercritical flow instability and heat transfer. Two types of flow instabilities are analyzed and results are compared with 1-D non-linear code solutions. Also, conditions for approximating the thresholds of instabilities based on steady-state results are assessed. It is determined that the results of instability thresholds obtained using the k-ɛ and the SST models are similar. Also the results of CFD and 1-D codes are different mainly due to the difference in the pressure drop predictions. Moreover, approximating the flow instability threshold by the conditions proposed holds true for a CFD solution. Results also indicate that Prt does not have a noticeable effect on the instability threshold for the cases examined.en_US
dc.description.noteMay 2014en_US
dc.identifier.urihttp://hdl.handle.net/1993/23345
dc.language.isoengen_US
dc.rightsopen accessen_US
dc.subjectSupercritical Flowen_US
dc.subjectCFDen_US
dc.subjectInstability Thresholden_US
dc.subjectTurbulence Modelsen_US
dc.subjectTurbulent Prandtl Numberen_US
dc.titleNumerical stability and heat transfer analyses of supercritical water flowing upward In vertical heated pipesen_US
dc.typemaster thesisen_US
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