Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection

Permanent URI for this collectionhttps://hdl.handle.net/11147/7148

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Subject: search.filters.subject.PermeabilityWoS Q: search.filters.wosQuartile.Q4

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Now showing 1 - 2 of 2
  • Article
    Citation - WoS: 2
    Citation - Scopus: 3
    Effect of Voxel Size in Flow Direction on Permeability and Forchheimer Coefficients Determined by Using Micro-Tomography Images of a Porous Medium
    (Inderscience Enterprises Ltd., 2015) Uçar, Eren; Mobedi, Moghtada; Altıntaş, Gökhan; Glatt, Erik
    The permeability and Forchheimer coefficients of a porous medium, volcanic rock, are determined using micro-tomography images. A cubic volume in the middle of the images is extracted as REV (representative volume). The voids in the REV are discretised into anisotropic voxels using the commercial program of GeoDict. Seven computational domains with different voxel size in flow direction are generated. The velocity and pressure fields in the voids are obtained for Reynolds numbers ranging from 0.01 to 10. The obtained fields are used to determine the permeability and the Forchheimer coefficients. The performed calculations show that the nominal pore size changes with the voxel size in flow direction, however permeability and the Forchheimer coefficient approaches to the constant values.
  • Article
    Citation - Scopus: 1
    The Effect of Bio-Based Plasticizer on the Permanence and Water Vapour Transport Properties of Pvc Plastigels
    (Serbian Chemical Society, 2008) Okieimen, Felix Ebhodaghe; Egbuchunam, Theresa Obuajulu; Balköse, Devrim
    Novel formulations of PVC plastisols based on blends of bio-based and synthetic plasticizers were prepared and characterized. A traditional phthalate plasticizer, dioctylphthalate, was replaced in the plastisols studied by the epoxidized rubber seed oil (4.5 % oxirane content). The plastisols formed were processed into plastigels and characterized in terms of permanence properties using leaching and migration tests and water vapour barrier properties. It was found that the permanence properties of PVC/DOP plastigels were maintained in the presence of up to 50 % ERSO, and that blending with DOP did not impair the water barrier properties of PVC plastigels.