Search for: eulerian-lagrangian-approach
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    Modeling of flow field and separation efficiency of a deoiling hydrocyclone using large eddy simulation

    , Article International Journal of Mineral Processing ; Volume 112-113 , 2012 , Pages 84-93 ; 03017516 (ISSN) Saidi, M ; Maddahian, R ; Farhanieh, B ; Afshin, H ; Sharif Unviersity of Technology
    Elsevier  2012
    In order to evaluate the separation efficiency and flow field of deoiling hydrocyclones a three dimensional simulation is performed using large eddy simulation (LES) approach. Although this approach has been used in other types of hydrocyclones, the present work is a primer application of the LES approach for simulation of deoiling hydrocyclones. Due to anisotropic behavior of flow inside the hydrocyclones, LES is a suitable method to predict the flow field since it resolves large scales and models isotropic small scales. Obtained velocity field using the LES approach in comparison with other turbulence models is in good agreement with available experimental velocity measurements. The method... 

    Careful parameter study to enhance the effect of injecting heavy fuel oil into a crossflow using numerical approaches

    , Article ASME 2018 5th Joint US-European Fluids Engineering Division Summer Meeting, FEDSM 2018, 15 July 2018 through 20 July 2018 ; Volume 2 , July , 2018 ; 08888116 (ISSN) ; 9780791851562 (ISBN) Darbandi, M ; Fatin, A ; Schneider, G.E ; Fluids Engineering Division ; Sharif University of Technology
    American Society of Mechanical Engineers (ASME)  2018
    The flow and spray parameters can have noticeable roles in heavy fuel oil (HFO) spray finesse. As known, the interaction between droplets and cross flow should be considered carefully in many different industrial applications such as the process burners and gas turbine combustors. So, it would be so important to investigate the effect of injecting HFO into a crossflow more subtly. In this work, the effects of various flow and spray parameters on the droplet breakup and dispersion parameters are investigated numerically using the finite-volume-element method. The numerical method consists of a number of different models to predict the droplets breakup and their dispersion into a cross flow... 

    CFD modeling of immiscible liquids turbulent dispersion in Kenics static mixers: Focusing on droplet behavior

    , Article Chinese Journal of Chemical Engineering ; Volume 28, Issue 2 , 2020 , Pages 348-361 Haddadi, M. M ; Hosseini, S. H ; Rashtchian, D ; Ahmadi, G ; Sharif University of Technology
    Chemical Industry Press  2020
    The present study is concerned with the computational fluid dynamics (CFD) simulation of turbulent dispersion of immiscible liquids, namely, water–silicone oil and water–benzene through Kenics static mixers using the Eulerian–Eulerian and Eulerian–Lagrangian approaches of the ANSYS Fluent 16.0 software. To study the droplet size distribution (DSD), the Eulerian formulation incorporating a population balance model (PBM) was employed. For the Eulerian–Lagrangian approach, a discrete phase model (DPM) in conjunction with the Eulerian approach for continuous phase simulation was used to predict the residence time distribution (RTD) of droplets. In both approaches, a shear stress transport (SST)... 

    Three dimensional heat transfer modeling of gas-solid flow in a pipe under various inclination angles

    , Article Powder Technology ; Vol. 262, Issue. 1 , 2014 , pp. 223-232 ; ISSN: 0032-5910 Pishvar, M ; Saffar Avval, M ; Mansoori, Z ; Amirkhosravi, M ; Sharif University of Technology
    The turbulent heat transfer in gas-solid flows through an inclined pipe under various inclination angles is studied with constant wall heat flux. The hydrodynamic k- τ and kθ- τθ thermal two phase model is used in a lagrangian/Eulerian four way approach. The numerical results agreed reasonably with available experimental data in vertical and horizontal pipe flows. The effects of inclination angles on the flow patterns are reported. The pressure drop and Nusselt number are enhanced significantly as the inclination increases up to a certain angle. The mass loading ratio has influence on the optimal inclination angle. With increasing loading ratio, the optimal inclination angle of maximum...