Mechanical Engineering / Makina Mühendisliği

Permanent URI for this collectionhttps://hdl.handle.net/11147/4129

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Institution Author: search.filters.institutionAuthor.Bilir, LeventPublisher: search.filters.publisher.Elsevier Ltd.

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  • Other
    Citation - WoS: 1
    Citation - Scopus: 1
    Erratum To "total Solidification Time of a Liquid Phase Change Material Enclosed in Cylindrical/Spherical Containers" [applied Thermal Engineering 25 (10) (2005) 1488-1502] (doi:10.1016/J.applthermaleng.2004.10.005)
    (Elsevier Ltd., 2007) Bilir, Levent; İlken, Zafer
    Refers To Levent Bilir, Zafer İlken Total solidification time of a liquid phase change material enclosed in cylindrical/spherical containers Applied Thermal Engineering, Volume 25, Issue 10, July 2005, Pages 1488-1502
  • Article
    Citation - WoS: 84
    Citation - Scopus: 96
    Total Solidification Time of a Liquid Phase Change Material Enclosed in Cylindrical/Spherical Containers
    (Elsevier Ltd., 2005) Bilir, Levent; İlken, Zafer
    This study investigates the inward solidification problem of a phase change material (PCM) encapsulated in a cylindrical/spherical container with a third kind of boundary condition. The governing dimensionless equations of the problem and boundary conditions are formulated and solved numerically by using enthalpy method with control volume approach. The problem is solved many times for different values of the affecting parameters and data sets are obtained for dimensionless total solidification time of the PCM. These data sets are then used to derive correlations which express the dimensionless total solidification time of the PCM in terms of Stefan Number, Biot Number and Superheat Parameter.
  • Article
    Citation - WoS: 101
    Citation - Scopus: 132
    Effect of Geometrical Parameters on Heat Transfer and Pressure Drop Characteristics of Plate Fin and Tube Heat Exchangers
    (Elsevier Ltd., 2005) Erek, Aytunç; Özerdem, Barış; Bilir, Levent; İlken, Zafer
    In this study, the influences of the changes in fin geometry on heat transfer and pressure drop of a plate fin and tube heat exchanger are investigated, numerically. A computational fluid dynamics (CFD) program called Fluent is used in the analysis. The segment of one tenth of fin is used in the modeling, due to symmetrical condition. The results of heat transfer, static, and total pressure drop values of ten different fins are tabulated and the normalized values of them are, also, given for the comparison of the models. The distance between fins is found to have a considerable effect on pressure drop. It is observed that placing the fin tube at downstream region affects heat transfer positively. Another important result of the study is that increasing ellipticity of the fin tube increases the heat transfer while it, also, results in an important reduction in pressure drop.