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  • Open Access

    ARTICLE

    A Experimental Study on the Rhelogical and Mechanical Properties of Blends of Polyethylene and Modified Oil Shale Ash (MOSA)

    Y.H. Liu1, X.X. Xue2, J.M.Shen1

    FDMP-Fluid Dynamics & Materials Processing, Vol.11, No.2, pp. 197-204, 2015, DOI:10.3970/fdmp.2015.011.195

    Abstract Blends of Polyethylene (PE) and modified-oil shale ash (MOSA) with different fractions of MOSA were prepared by the melting blend method. The effects of MOSA content on the rheological and mechanical properties of the blend were properly assessed via direct experimental analysis (more precisely, all rheological measurements were performed using a laboratory-scale XSS-300 torque rheometer with single screw extruder; the temperatures were maintained at 170°C, 180°C and 190°C under continuous extrusion). The prepared samples were observed to display a shear-thinning behaviour. Moreover, with increasing the MOSA content, we found the yield strength of the blends More >

  • Open Access

    ARTICLE

    AN EXPERIMENTAL STUDY OF THE EFFECT OF PRESSURE INLET GAS ON A COUNTER-FLOW VORTEX TUBE

    Mahyar Kargaran*, Mahmood Farzaneh-Gord

    Frontiers in Heat and Mass Transfer, Vol.4, No.1, pp. 1-6, 2013, DOI:10.5098/hmt.v4.1.3007

    Abstract Vortex tube is a simple device which separate an inlet gas with a proper pressure into hot and cold flows .This device is well-suited for generating cooling load gas because it provides the cold gas without using any refrigerants . Many research works has been carried out in order to identify the factors which contribute to Vortex tube performance. Here, an experimental study has been made to determine the effect of geometrical (length of vortex tube) and thermo-physical (pressure) parameters on vortex tube performance and air also used as a working fluid. More >

  • Open Access

    ARTICLE

    EXPERIMENTAL STUDY OF COEFFICIENT OF THERMAL EXPANSION OF ALIGNED GRAPHITE THERMAL INTERFACE MATERIALS

    Hsiu-Hung Chena , Yuan Zhaob, Chung-Lung Chena,*

    Frontiers in Heat and Mass Transfer, Vol.4, No.1, pp. 1-7, 2013, DOI:10.5098/hmt.v4.1.3004

    Abstract Carbon-based materials draw more and more attention from both academia and industry: its allotropes, including graphene nanoplatlets, graphite nanoplatlets and carbon nanotubes, can readily enhance thermal conductivity of thermal interface products when served as fillers. Structuraloptimization in micro/nano-scale has been investigated and expected to finely tune the coefficient of thermal expansion (CTE) of thermal interface materials (TIMs). The capability of adjusting CTE of materials greatly benefits the design of interface materials as CTE mismatch between materials may result in serious fatigue at the interface region that goes through thermal cycles. Recently, a novel nano-thermal-interface material… More >

  • Open Access

    ARTICLE

    An Experimental Study on Enhancing Cooling Rates of Low Thermal Conductivity Fluids Using Liquid Metals

    S.-A. B. Al Omari1,2, E. Elnajjar1

    FDMP-Fluid Dynamics & Materials Processing, Vol.9, No.2, pp. 91-109, 2013, DOI:10.3970/fdmp.2013.009.091

    Abstract In a previous numerical study (Al Omari, Int. Communication in Heat and Mass Transfer, 2011) the heat transfer enhancement between two immiscible liquids with clear disparity in thermal conductivity such as water and a liquid metal (attained by co- flowing them in a direct contact manner alongside each other in mini channel) was demonstrated. The present work includes preliminary experimental results that support those numerical findings. Two immiscible liquids (hot water and liquid gallium) are allowed experimentally to exchange heat (under noflow conditions) in a stationary metallic cup where they are put in direct contact.… More >

  • Open Access

    ARTICLE

    An Experimental Study on Drying of Pistacia Terebinthus in a Fixed Bed Dryer

    A. Balbay1, H. Ülker2, Ö. Şahin3

    FDMP-Fluid Dynamics & Materials Processing, Vol.9, No.1, pp. 1-10, 2013, DOI:10.3970/fdmp.2013.009.001

    Abstract In this study, drying behaviours of the outer shell peeled Bittim (Pistacia terebinthus) with initial moisture content of 42.2% (dry basis (d.b)) was investigated in a novel fixed bed drying system. The drying experiments were performed at different temperatures (40 °C, 60 °C and 80 °C), air velocities (0.5 m/s and 1 m/s) and weights (30 g and 40 g). A constant rate period was not observed in the drying of bittims; all the drying process occurred in falling rate period. Three models in literature were selected to fit the experimental data. The fit quality of models More >

  • Open Access

    ARTICLE

    Experimental Study and Simulation on Compression Character of Warp Knitted Spacer Fabrics

    Jing Qian1, Xuhong Miao2, Yao Shen3

    CMC-Computers, Materials & Continua, Vol.27, No.2, pp. 179-188, 2012, DOI:10.32604/cmc.2012.027.179

    Abstract Based on experimental data, the research work on warp knitted spacer fabrics gives compression laws when structural parameters (such as diameter of spacer yarn, areal density, spacer yarn angle and the thickness of spacer fabrics ) of spacer fabric change. ANSYS calculation models were developed, and simulation results matched with experimental data well. The computer simulation on this area provides a fundamental tool which can help designer to decide structural parameters when working stresses are given. More >

  • Open Access

    ARTICLE

    An Experimental Study of Two-Phase Flow in Porous Media with Measurement of Relative Permeability

    N. Labed1, L. Bennamoun2, J.P. Fohr3

    FDMP-Fluid Dynamics & Materials Processing, Vol.8, No.4, pp. 423-436, 2012, DOI:10.3970/fdmp.2012.008.423

    Abstract Intrinsic and relative permeability are indispensable parameters for performing transfers in porous media. In this paper, the conception and ensuing exploitation of a new testing ground for measuring the relative permeability of water and nitrogen are presented. The experimental work was elaborated in the Laboratory of Thermal Studies in Poitiers, (France) where brick samples were used to verify the performance of the proposed testing strategy. The results prove the existence of several stages during the drainage and the imbibitions. In particular, the three stages observed for the case of gas permeability reduce to only two More >

  • Open Access

    ABSTRACT

    Experimental Study on Dynamic Collision of Nuclear Graphite Bricks

    WANG Hong-tao, SUN Li-bin, WANG Haitao, MA Shao-peng

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.17, No.1, pp. 9-10, 2011, DOI:10.3970/icces.2011.017.009

    Abstract Nuclear graphite is a fine high-temperature structural material, so it has been widely used to manufacture graphite bricks of the reflectors in high temperature gas-cooled reactors (HTGRs). Since graphite bricks are stacked together and interconnected by keys and keyways, the collision between graphite bricks will happen when the seismic load or other load is applied. In order to study the collision behavior, a collision test system was built. The velocities of two graphite bricks were measured by a high-speed image capturing technology, and the coefficient of restitution and contact time was obtained by the velocity-time More >

  • Open Access

    ABSTRACT

    Experimental Study on Static Strength of Tubular Y-Joints

    YANG Jie, SHAO Yongbo, CHEN Cheng

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.16, No.4, pp. 111-112, 2011, DOI:10.3970/icces.2011.016.111

    Abstract A typical Y-joint is made up of a chord member and a brace member. In this structure, the brace member is usually subjected to axial load, and so the chord is always subjected to radial load which is tranferred from the brace member. As the stiffness of the chord in the radial direction is usually much smaller than that of the brace in the axial direction, failure often occurs near the weld toe on the chord surface. Increasing the thickness of the chord near the weld toe can enlarge the radial stiffness of the chord,… More >

  • Open Access

    ABSTRACT

    Experimental Study on Zonal Disintegration of some kinds of Layered Similar Material Model

    ZHANG Zhi-hui, WANG Xue-bin, PAN Yi-shan

    The International Conference on Computational & Experimental Engineering and Sciences, Vol.16, No.4, pp. 99-100, 2011, DOI:10.3970/icces.2011.016.099

    Abstract It is known from experimental studies that a zonal periodic structure in the form of alternated regions of fractured and relatively intact rock appears around rock workings. It is impossible to describe the occurrence of such a structure on the basis of the classical continuum model, so it attracted the research's wide attention. In order to know the crack distribution and its change along the axial direction, and this phenomenon may take place in which kinds of material, four kinds of layered similar materials blocks are used to establish a barrel model. The crack distribution More >

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