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  • Open Access


    An Experimental Investigation on Workability and Bleeding Behaviors of Cement Pastes Doped with Nano Titanium Oxide (n-TiO2) Nanoparticles and Fly Ash

    Fatih Çelik1,*, Oğuzhan Yıldız2, Andaç Batur Çolak3, Samet Mufit Bozkır1

    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.1, pp. 135-158, 2023, DOI:10.32604/fdmp.2022.021014

    Abstract In this study, the workability of cement-based grouts containing n-TiO2 nanoparticles and fly ash has been investigated experimentally. Several characteristic quantities (including, but not limited to, the marsh cone flow time, the mini slump spreading diameter and the plate cohesion meter value) have been measured for different percentages of these additives. The use of fly ash as a mineral additive has been found to result in improvements in terms of workability behavior as expected. Moreover, if nano titanium oxide is also used, an improvement can be obtained regarding the bleeding values for the cement-based grout mixes. Using such experimental data,… More >

  • Open Access


    Flow and Melting Thermal Transfer Enhancement Analysis of Alumina, Titanium Oxide-Based Maxwell Nanofluid Flow Inside Double Rotating Disks with Finite-Element Simulation

    Liangliang Chen1, Madeeha Tahir2,*, Sumeira Yasmin3, Taseer Muhammad4, Muhammad Imran5,*, Fenghua Liu1

    CMES-Computer Modeling in Engineering & Sciences, Vol.130, No.3, pp. 1771-1788, 2022, DOI:10.32604/cmes.2022.017539

    Abstract The energy produced by the melting stretching disks surface has a wide range of commercial applications, including semi-conductor material preparation, magma solidification, permafrost melting, and frozen land refreezing, among others. In view of this, in the current communication we analyzed magnetohydrodynamic flow of Maxwell nanofluid between two parallel rotating disks. Nanofluids are important due to their astonishing properties in heat conduction flows and in the enhancement of electronic and manufacturing devices. Furthermore, the distinct tiny-sized particles and in the Maxwell water-based fluid for enhancing the heat transfer rate are analyzed. The heat equation is developed in the occurrence of thermal… More >

  • Open Access


    Preparation and Electrorheological Response of PAL/TiO2/PANI Nanorods

    Ling Wang1,2, Chenchen Huang1, Ping Zhang3, Fenghua Liu1,*, Ting Zou1, Zhixiang Li1, Jianfei Zhang1, Gaojie Xu1

    Journal of Renewable Materials, Vol.9, No.10, pp. 1707-1715, 2021, DOI:10.32604/jrm.2021.013884

    Abstract Using palygorskite (PAL) as template, the PAL/TiO2/PANI nano-rods were synthesized by heterogeneous precipitation and in-situ polymerization. The synthesized PAL/TiO2/PANI nanorods were used as a novel electrorheological (ER) fluid by mixing with silicone oil, which showed excellent ER effect. The yield stress of the PAL/TiO2/PANI based ER fluid (15 vol%) reached 8.8 kPa under 4 kV mm−1 electric field. The dynamic shear stress of the PAL/TiO2/PANI based ER fluid could maintain a stable level in the shear rate range of 0.1–100 s−1 . Furthermore, the PAL/TiO2/PANI ER fluid exhibited excellent suspension stability. More >

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