Publication de 12 numéros par an
ISSN Imprimer: 1091-028X
ISSN En ligne: 1934-0508
Indexed in
Numerical Solution of Turbulent Channel Flow Past a Backward-Facing Step with a Porous Insert Using Linear and Nonlinear k-ε Models
RÉSUMÉ
This work presents a numerical investigation of turbulent flow past a backward-facing-step channel with a porous insert using linear and nonlinear eddy viscosity macroscopic models. The nonlinear turbulence models are known to perform better than classical eddy-diffusivity models due to their ability to simulate important characteristics of the flow. Turbulence-driven secondary motion and the effects of streamline curvature on turbulence cannot be fully accounted for with simpler isotropic models. Parameters such as porosity, permeability, and thickness of the porous insert are varied in order to analyze their effects on the flow pattern, particularly on the damping of the recirculating bubble after the porous insertion. The numerical technique employed for discretizing the governing equations is the control-volume method. The SIMPLE algorithm is used to correct the pressure field. The classical wall function is utilized in order to handle flow calculation near the wall. Comparisons of results simulated with both linear and nonlinear turbulence models are shown.
-
De Lemos M. J. S., Fundamentals of the double - decomposition concept for turbulent transport in permeable media, Materialwissenschaft und Werkstofftechnik, 36, 10, 2005. Crossref
-
Braga Edimilson J., de Lemos Marcelo J. S., Turbulent Heat Transfer in an Enclosure With a Horizontal Permeable Plate in the Middle, Journal of Heat Transfer, 128, 11, 2006. Crossref
-
De Lemos Marcelo J. S., Turbulent Flow Around Fluid–Porous Interfaces Computed with a Diffusion-Jump Model for k and ε Transport Equations, Transport in Porous Media, 78, 3, 2009. Crossref
-
de Lemos Marcelo J. S., Saito Marcelo B., Heat-Transfer Coefficient for Cellular Materials Modelled as an Array of Elliptic Rods, Advanced Engineering Materials, 11, 10, 2009. Crossref
-
De Lemos Marcelo J. S., Analysis of turbulent flows in fixed and moving permeable media, Acta Geophysica, 56, 3, 2008. Crossref
-
Graminho Daniel R., de Lemos Marcelo J.S., Simulation of turbulent impinging jet into a cylindrical chamber with and without a porous layer at the bottom, International Journal of Heat and Mass Transfer, 52, 3-4, 2009. Crossref
-
de Lemos Marcelo J. S., Fischer Cleges, Thermal Analysis of an Impinging Jet on a Plate With and Without a Porous Layer, Numerical Heat Transfer, Part A: Applications, 54, 11, 2008. Crossref
-
Graminho Daniel R., de Lemos Marcelo J. S., Laminar Confined Impinging Jet into a Porous Layer, Numerical Heat Transfer, Part A: Applications, 54, 2, 2008. Crossref
-
Santos Nicolau B., de Lemos Marcelo J. S., Flow and Heat Transfer in a Parallel-Plate Channel with Porous and Solid Baffles, Numerical Heat Transfer, Part A: Applications, 49, 5, 2006. Crossref
-
Assato Marcelo, de Lemos Marcelo J. S., Turbulent Flow in Wavy Channels Simulated with Nonlinear Models and a New Implicit Formulation, Numerical Heat Transfer, Part A: Applications, 56, 4, 2009. Crossref
-
Assato Marcelo, de Lemos Marcelo J. S., A novel implicit numerical treatment for non-linear turbulence models using high and low Reynolds number formulations, International Journal for Numerical Methods in Fluids, 66, 12, 2011. Crossref
-
Fischer Cleges, de Lemos Marcelo J. S., A Turbulent Impinging Jet on a Plate Covered with a Porous Layer, Numerical Heat Transfer, Part A: Applications, 58, 6, 2010. Crossref
-
Chen X. B., Yu P., Winoto S. H., Low H. T., Forced Convection Over a Backward-Facing Step with a Porous Floor Segment, Numerical Heat Transfer, Part A: Applications, 53, 11, 2008. Crossref
-
de Lemos Marcelo J.S., Silva Renato A., Turbulent flow over a layer of a highly permeable medium simulated with a diffusion-jump model for the interface, International Journal of Heat and Mass Transfer, 49, 3-4, 2006. Crossref
-
Braga Edimilson J., de Lemos Marcelo J.S., Simulation of turbulent natural convection in a porous cylindrical annulus using a macroscopic two-equation model, International Journal of Heat and Mass Transfer, 49, 23-24, 2006. Crossref
-
de Lemos Marcelo J. S., Dórea Felipe T., Simulation of a Turbulent Impinging Jet into a Layer of Porous Material Using a Two–Energy Equation Model, Numerical Heat Transfer, Part A: Applications, 59, 10, 2011. Crossref
-
Tofaneli Luzia A., de Lemos Marcelo J.S., Double-diffusive turbulent natural convection in a porous square cavity with opposing temperature and concentration gradients, International Communications in Heat and Mass Transfer, 36, 10, 2009. Crossref
-
Braga Edimilson J., de Lemos Marcelo J.S., Laminar natural convection in cavities filled with circular and square rods, International Communications in Heat and Mass Transfer, 32, 10, 2005. Crossref
-
References, in Turbulence in Porous Media, 2006. Crossref
-
de Lemos Marcelo J.S., Saito Marcelo B., Computation of turbulent heat transfer in a moving porous bed using a macroscopic two-energy equation model, International Communications in Heat and Mass Transfer, 35, 10, 2008. Crossref
-
References, in Turbulence in Porous Media, 2012. Crossref
-
Fonov S. D., Jones E.G., Crafton J. W., Goss L. P., Fonov V. S., Using Surface Stress Sensitive Films for Pressure and Friction Measurements in Mini- and Micro-Channels, 2007 22nd International Congress on Instrumentation in Aerospace Simulation Facilities, 2007. Crossref
-
Galuppo Wagner C., de Lemos Marcelo J. S., Turbulent heat transfer past a sudden expansion with a porous insert using a nonlinear model, Numerical Heat Transfer, Part A: Applications, 71, 3, 2017. Crossref
-
Nield Donald A., Bejan Adrian, Mechanics of Fluid Flow Through a Porous Medium, in Convection in Porous Media, 2017. Crossref
-
de Lemos Marcelo J. S., Combustion Systems, in Thermal Non-Equilibrium in Heterogeneous Media, 2016. Crossref
-
de Lemos Marcelo J.S., Mesquita Maximilian S., Comparison of Four Thermo-Mechanical Models for Simulating Reactive Flow in Porous Materials, Defect and Diffusion Forum, 297-301, 2010. Crossref
-
de Lemos Marcelo J.S., Assato Marcelo, Turbulence structure and heat transfer in a sudden expansion with a porous insert using linear and non-linear turbulence models, International Journal of Thermal Sciences, 141, 2019. Crossref
-
de Lemos Marcelo J. S., Introduction, in Turbulent Impinging Jets into Porous Materials, 2012. Crossref
-
de Lemos Marcelo J. S., Simulation of Turbulent Combustion in Porous Materials with One- and Two-Energy Equation Models, in Heat Transfer in Multi-Phase Materials, 2, 2010. Crossref
-
Zhao Ziqiang, Numerical modeling and simulation of heat transfer and fluid flow in a two-dimensional sudden expansion model using porous insert behind that, Journal of Thermal Analysis and Calorimetry, 141, 5, 2020. Crossref
-
Dórea Felipe T., de Lemos Marcelo J.S., Simulation of laminar impinging jet on a porous medium with a thermal non-equilibrium model, International Journal of Heat and Mass Transfer, 53, 23-24, 2010. Crossref
-
de Lemos Marcelo J.S., Analysis of turbulent combustion in inert porous media, International Communications in Heat and Mass Transfer, 37, 4, 2010. Crossref
-
Saito Marcelo B., de Lemos Marcelo J.S., Laminar heat transfer in a porous channel simulated with a two-energy equation model, International Communications in Heat and Mass Transfer, 36, 10, 2009. Crossref
-
Saito Marcelo B., de Lemos Marcelo J.S., A macroscopic two-energy equation model for turbulent flow and heat transfer in highly porous media, International Journal of Heat and Mass Transfer, 53, 11-12, 2010. Crossref
-
Arthur James K., Coherent Structures of a Turbulent Flow Bounded by a Compact Permeable Wall, Fluids, 7, 5, 2022. Crossref
-
de Lemos Marcelo J.S., Numerical simulation of turbulent combustion in porous materials, International Communications in Heat and Mass Transfer, 36, 10, 2009. Crossref