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  • Open Access



    Hasan Sh. Majdia , Ammar Abdulkadhimb,* , Azher M. Abedb

    Frontiers in Heat and Mass Transfer, Vol.12, pp. 1-14, 2019, DOI:10.5098/hmt.12.2

    Abstract Fluid flow and natural convection heat transfer in a parallelogram enclosure with an inner circular cylinder using Cu-water nanofluid are studied numerically. Dimensionless Navier-Stokes and energy equations are solved numerically using finite element method based two-dimensional flow and steady-state conditions. This study evaluates the effect of different concentrations of Cu-water nanofluids (0% to 6%) with different Rayleigh numbers 103 ≤ Ra ≤ 106 under isotherm wall temperatures. The effects of geometrical parameters of the parallelogram enclosure (inclination angle in range of 0 ≤ α ≤ 30 and location of inner circular cylinder -0.2 ≤ H ≤ +0.2 on the flow… More >

  • Open Access



    Olanrewaju M. Oyewolaa,b,*, Samuel I. Afolabib

    Frontiers in Heat and Mass Transfer, Vol.19, pp. 1-8, 2022, DOI:10.5098/hmt.19.20

    Abstract This paper investigates numerically the problem of convective heat transfer and entropy generation by two adiabatic obstacles positioned inside a square cavity heated at the left wall and cooled on the right wall while horizontal walls are adiabatic. The inclination angle of the cavity orientation investigated are 30, 60 and 90 degrees. Rayleigh numbers ranging from 103 to 106 were calculated for two vertical obstacles. The method of Galerkin finite element was employed to solve the conservation equations of mass, momentum and energy. The cavity is assumed to be filled with air with Prandtl number of 0.71. It was observed… More >

  • Open Access


    Influence of the Inclination Angle on Mixed Convection and Heat Transfer in a “T” Shaped Double Enclosure

    M’Barka Mourabit1,*, Meryam Meknassi2, Soukaina Fekkar1, Soumia Mordane1, Hicham Rouijaa3, El Alami Semma4

    FDMP-Fluid Dynamics & Materials Processing, Vol.19, No.7, pp. 1753-1774, 2023, DOI:10.32604/fdmp.2023.025739


    The effect of the tilt angle on mixed convection and related heat transfer in a “T” shaped double enclosure with four heated obstacles on the bottom surface is numerically investigated. The considered obstacles are constantly kept at a relatively high (fixed) temperature, while the cavity’s upper wall is cooled. The finite volume approach is used to solve the mass, momentum, and energy equations with the SIMPLEC algorithm being exploited to deal with the pressure-velocity coupling. Emphasis is put on the influence of the tilt angle on the solution symmetry, flow structure, and heat exchange through the walls. The following parameters… More > Graphic Abstract

    Influence of the Inclination Angle on Mixed Convection and Heat Transfer in a “T” Shaped Double Enclosure

  • Open Access


    Turbulent Double-Diffusive Natural Convection and Entropy Generation within an Inclined Square Cavity

    Khaled Said*, Ahmed Ouadha, Amina Sabeur

    FDMP-Fluid Dynamics & Materials Processing, Vol.18, No.6, pp. 1619-1629, 2022, DOI:10.32604/fdmp.2022.022220

    Abstract The present study deals with double-diffusive convection within a two-dimensional inclined cavity filled with an air-CO2 binary gas mixture. The left and the right vertical walls are differentially heated and subjected to different locations of (CO2) contaminants to allow for the variation of the buoyancy strength (N). However, the horizontal walls are assumed adiabatic. The simulations are conducted using the finite volume method to solve the conservation equations of continuity, momentum, energy, and species transport. Good agreement with other numerical results in the literature is obtained. The effect of multiple parameters, namely, buoyancy ratio (N), thermal Rayleigh number (Ra), and… More >

  • Open Access


    Experimental Study on the Effect of the Inclination Angle on the Scouring Efficiency of Submerged Water Jets

    Zhibin Zhang1,2, Yongjun Gong1,*, Liping Zhang3, Min Xv2, Gaofeng Shang4

    FDMP-Fluid Dynamics & Materials Processing, Vol.18, No.5, pp. 1363-1371, 2022, DOI:10.32604/fdmp.2022.019746

    Abstract The effects of oblique submerged scouring jets on sand beds with various particle sizes have been studied experimentally. In particular, a total of 25 experiments have been carried out to explore the influences of the jet angle and application time on the considered submerged sand beds. Test results conducted with a specially-designed device have shown that the scouring efficiency attains a maximum when the inclination angle is in the range between 15° and 20° and then it decreases when the inclination angle becomes higher. More >

  • Open Access


    Effect of the Inclination Angle on Slippage Loss in Gas-Liquid Two-Phase Flow

    Yushan Liu1,2, Yubin Su3, Zhenhua Wu4, Wei Luo1,2, Ruiquan Liao1,2,*

    FDMP-Fluid Dynamics & Materials Processing, Vol.16, No.3, pp. 475-488, 2020, DOI:10.32604/fdmp.2020.08896

    Abstract The lifting efficiency and stability of gas lift well are affected by the socalled slippage-loss effect in gas-liquid two-phase flow. The existing studies on this subject have generally been based on vertical and horizontal wells. Only a few of them have considered inclined pipes. In the present work a new focused study is presented along these lines. More specifically, we use the non-slip pressure drop model with Flanigan’s fluctuation correction coefficient formula (together with the parameters of slippage density, slippage pressure drop and slippage ratio) to analyze the influence of the inclination angle on slippage loss for different conditions (different… More >

  • Open Access


    Assessment of the Locomotion and the Long-term Efficacy of Biomechanics Foot Orthotic for the Subjects with Adolescent Idiopathic Scoliosis

    Chien-Chi Liu1, Sai-Wei Yang1,*, Tsui-Fen Yang2

    Molecular & Cellular Biomechanics, Vol.16, Suppl.2, pp. 120-122, 2019, DOI:10.32604/mcb.2019.07150

    Abstract Scoliosis is the most common type of spinal deformity of the young adults, and women outnumber men about 10:1 [1], in which the Adolescent Idiopathic Scoliosis (AIS) is up to 90% for ages 10 to 16year-old teenagers [2]. Studies revealed that due to the 3-dimensional musculoskeletal deformities, the AIS subjects to the dynamic postural instability including vestibular and proprioception disorders [3-5]. Dynamic postural Balance is monitored by integration of cortical modulation and somatosensory response [6], and the either motor or sensory impairment lead to balance dysfunction as well as pathologic gait. Studies revealed that the biomechanics functional foot orthotics can… More >

  • Open Access


    Numerical Investigation of Fluid and Thermal Flow in a Differentially Heated Side Enclosure Walls at Various Inclination Angles

    C.S. Nor Azwadi1, N.I.N. Izual2

    CMES-Computer Modeling in Engineering & Sciences, Vol.84, No.6, pp. 559-574, 2012, DOI:10.3970/cmes.2012.084.559

    Abstract Natural convection in a differentially heated enclosure plays vital role in engineering applications such as nuclear reactor, electronic cooling technologies, roof ventilation, etc. The developed thermal flow patterns induced by the density difference are expected to be critically dependence on the inclination angles of the cavity. Hence, thermal and fluid flow pattern inside a differentially heated side enclosure walls with various inclination angles have been investigated numerically using the mesoscale lattice Boltzmann scheme. Three different dimensionless Rayleigh numbers were used, and a dimensionless Prandtl number of 0.71 was set to simulate the circulation of air in the system. It was… More >

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