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numerical simulation of the mixing and flow

numerical simulation of the mixing and flow

Numerical simulation of the fluid flow and the mixing ...

Aug 01, 1995  A numerical simulation can give much more insight into the flow and the mixing of such a facility because the simulation gives data at every gridpoint, whereas the experiment only gives data at locations where measurements have been carried out. This can lead to a

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Numerical simulation of flow and mixing behavior of ...

Aug 01, 2006  Numerical simulation was therefore performed to investigate the flow and mixing behavior of steady-state, two-dimensional laminar confined impinging streams of shear-thinning fluids. The coupled heat, mass and momentum balance equations were solved with the finite element method using commercial software FEMLAB ™ 3.0.

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"Numerical Simulation of Fluid Flow and Mixing in Gas ...

Numerical Simulation of Fluid Flow and Mixing in Gas-Stirred Ladle. Dan Yan, Purdue University. Abstract. Ladle metallurgy is one of the most important stages for producing high quality and clean steel in the secondary steelmaking process. It is not only used for transporting molten steel coming from primary steelmaking processes, but also for ...

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Numerical simulation of flow and mixing in ROCOM facility ...

Dec 01, 2014  To simplify the numerical simulation, the following assumptions are made in modeling flow and mixing in ROCOM facility: (1) incompressible fluid (water); (2) constant fluid properties. All the calculations performed in this study share the following features: • Transient solver • Coolant temperature and pressure: 25 °C, 1 bar •

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Numerical Simulation of Combined Mixing and Separating ...

Various flow bifurcations are investigated for two dimensional combined mixing and separating geometry. These consist of two reversed channel flows interacting through a gap in the common separating wall filled with porous media of Newtonian fluids and other with unidirectional fluid flows. The Steady solutions are obtained through an unsteady finite element approach that employs a Taylor ...

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The numerical simulation and analysis of turbulent flow ...

Various inlet mass flow rates were considered in the experiment. The flow velocity is 0.14 m/s, 0.47 m/s, 0.79 m/s and 1.15 m/s, and the Reynolds numbers are 1.62 × 10 3, 5.51 × 10 3, 9.25 × 10 3, and 1.35 × 10 4, respectively.The flow velocity condition of 1.15 m/s is used for the numerical simulation in this work.

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Numerical Simulation of Jet and Cross-Flow Mixing in Tee ...

In the present paper we investigated the mixing effect of uncompressible jet and cross-flow in Tee pipe based CFD, the model of Realizable was employed as the tool to simulate the flow field, and the model was validated by experimental result of relative research. The mixing effect of jet and cross-flow in various configuration of Tee pipe at different inlet velocity of jet was discussed.

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Numerical simulation of flow and mixing in ROCOM facility ...

Dec 01, 2014  To simplify the numerical simulation, the following assumptions are made in modeling flow and mixing in ROCOM facility: (1) incompressible fluid (water); (2) constant fluid properties. All the calculations performed in this study share the following features: • Transient solver • Coolant temperature and pressure: 25 °C, 1 bar •

get price

"Numerical Simulation of Fluid Flow and Mixing in Gas ...

Numerical Simulation of Fluid Flow and Mixing in Gas-Stirred Ladle. Dan Yan, Purdue University. Abstract. Ladle metallurgy is one of the most important stages for producing high quality and clean steel in the secondary steelmaking process. It is not only used for transporting molten steel coming from primary steelmaking processes, but also for ...

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Numerical Simulation and Validation of the Mixing of ...

Analysis of mixing in a model mixer using 2-D numerical simulation of differential viscoelastic fluids with particle tracking. J. Non-Newt. Fluid Mech., accepted. Ashokan, B., Fanning, L., Connelly, R.K. and Kokini, J.L. 2003. Determination of the flow and mixing in a continuous mixer using LDA and 3-D numerical simulation

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Numerical Simulation of Combined Mixing and Separating ...

Various flow bifurcations are investigated for two dimensional combined mixing and separating geometry. These consist of two reversed channel flows interacting through a gap in the common separating wall filled with porous media of Newtonian fluids and other with unidirectional fluid flows. The Steady solutions are obtained through an unsteady finite element approach that employs a Taylor ...

get price

Numerical Simulation of Turbulent Flow and Mixing in Gas ...

The turbulent flow and macro-mixing processes in gas–liquid–liquid stirred vessels agitated by a Rushton turbine have been numerically simulated, based on the Eulerian multifluid approach. Both the isotropic k–e model and anisotropic Reynolds stress model are used for turbulence modeling. The numerical models are validated by comparing simulated flow field of agitated immiscible liquid ...

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Numerical Simulation of Turbulent Flow and Mixing in Gas ...

Jun 02, 2017  The turbulent flow and macro-mixing processes in gas–liquid–liquid stirred vessels agitated by a Rushton turbine have been numerically simulated, based on the Eulerian multifluid approach. Both the isotropic k–ε model and anisotropic Reynolds stress model are used for turbulence modeling. The numerical models are validated by comparing simulated flow field of agitated immiscible

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Numerical simulation of mixing and heat transfer in an ...

Mar 15, 2019  2.2. Numerical method. The strength of finite element method is proven as a method based on a mathematical basis. The universal attempts for making it more optimized and its application to diverse fields of study from structural analysis to fluid-structure interactions and fluid flow simulation, turns this method a powerful and reliable one for numerical analysis [, , , ].

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Numerical Simulation of the Vortical Structures in a Lobed ...

Numerical simulations of an incompressible jet mixing flow exhausted from a circular lobed mixer/nozzle were presented and validated against whole-field quantitative Dual-Plane Stereoscopic PIV (DP-SPIV) measurement results of the same flow. The numerical simulations were conducted using a Reynolds Averaged Navier-Stokes approach with a

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Numerical simulation of compressible mixing layers ...

Oct 01, 2006  Three-dimensional spatially developing compressible planar mixing layers are studied numerically for convective Mach number M c = 0.4, 0.8 and 1.2. The present results for the flow-field structures, the mean velocity profiles, the mixing-layer growth rate and Reynolds stresses agree well with those of experiments and other numerical studies.

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A Numerical Investigation of Mixing Models in LES-FMDF for ...

In previous studies, the mixing model has been widely investigated for incompressible reactive flows [].Mitarai et al. [] investigated the performance of three mixing models, namely IEM, MC, and EMST, which are implemented in both Reynolds-averaged simulation and large-eddy simulation (LES).The results obtained from the simulation of a fully developed isotropic decaying turbulence showed that ...

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DEVELOPING METHODS FOR DESIGN AND ANALYSIS OF

Continuous Mixers through 3D Numerical Simulation of Flow and Mixing by BHARANI KUMAR ASHOKAN Dissertation Director: Dr. Jozef L. Kokini Design, scale up and selection of alternative geometries for dough mixers in order to achieve a well mixed final product with consistent rheological character is a major challenge in the food industry.

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Numerical simulation of the hydrodynamic instability ...

Abstract. Based on the numerical methods of volume of fluid (VOF) and piecewise parabolic method (PPM) and parallel circumstance of Message Passing Interface (MPI), a parallel multi-viscosity-fluid hydrodynamic code MVPPM (Multi-Viscosity-Fluid Piecewise Parabolic Method) is developed and performed to study the hydrodynamic instability and flow mixing.

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Numerical Simulation of Mixing Characteristics in the ...

Numerical simulation was performed with the computational fluid dynamics analysis software POLYFLOW to investigate the influence of different process conditions and structural parameters on mixing characteristics of the eccentric rotor extruder. The intensity of shear and elongational flow strengthened when the rotational speed increased, but the time for material to stay in the extruder will ...

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Reconstruction of numerical inlet boundary conditions ...

Aug 24, 2021  It is well known that inlet boundary conditions can have a major impact on the results and accuracy of a numerical simulation. Despite many advancements over the past few decades regarding the computational methods, it is still a challenge to specify proper inlet boundary conditions in the case of spatially developing turbulent flows (e.g., jets, mixing layers, and wall-bounded flows).

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Numerical simulation of fluid flow and mixing process in a ...

Numerical simulation of fluid flow and mixing process in a SCR denitration system Shang, D.; Li, B. K. Abstract. Selective Catalytic Reduction (SCR) with ammonia is a key technology to reduce the NOx emissions from the coal-fired power stations. The denitration efficiency of SCR system depends on whether the flue gas and ammonia can get a good ...

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NUMERICAL SIMULATION OF GAS FLOW AND MIXING IN A ...

Nov 10, 2010  (2002). NUMERICAL SIMULATION OF GAS FLOW AND MIXING IN A MICROCHANNEL USING THE DIRECT SIMULATION MONTE CARLO METHOD. Microscale Thermophysical Engineering: Vol. 6, No. 3, pp. 235-251.

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Numerical Simulation of Turbulent Flow and Mixing in Gas ...

Jun 02, 2017  The turbulent flow and macro-mixing processes in gas–liquid–liquid stirred vessels agitated by a Rushton turbine have been numerically simulated, based on the Eulerian multifluid approach. Both the isotropic k–ε model and anisotropic Reynolds stress model are used for turbulence modeling. The numerical models are validated by comparing simulated flow field of agitated immiscible

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Numerical Simulation of Injection and Mixing in Supersonic ...

Numerical Simulation of Injection and Mixing in Supersonic Flow. View/ Open. front.pdf (43.25Kb) ... A numerical investigation of the performance of two candidate designs for injection into supersonic flow, including a comparison of two renormalized group theory (RNG) based k-epsilon turbulence models with a more conventional k-epsilon model ...

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Numerical Simulation of Turbulent Flow and Mixing in Gas ...

The turbulent flow and macro-mixing processes in gas–liquid–liquid stirred vessels agitated by a Rushton turbine have been numerically simulated, based on the Eulerian multifluid approach. Both the isotropic k–e model and anisotropic Reynolds stress model are used for turbulence modeling. The numerical models are validated by comparing simulated flow field of agitated immiscible liquid ...

get price

Experimental and Numerical Simulation of Flow Pattern ...

A numerical simulation model of the flow mixing nozzle was established based on the mixing chamber and the orifice area of the experimental nozzle. In the simulation model, the nozzle mixing chamber, inner tube, and spray hole are all of the same size as the experimental nozzle, and the size of the nozzle external field is 10 times that of the ...

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Direct numerical simulation of reacting mixing layers ...

The objective of this paper is to clarify the effect of heat release and density difference in mean flow on the development of mixing layers. To achieve this purpose, we have performed a direct numerical simulation of a two-dimensional chemically reacting mixing layer by means of a spectral method. Low Mach number approximation was used to take into account the effect of density change.

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Numerical Simulation of Mixing Characteristics in the ...

Numerical simulation was performed with the computational fluid dynamics analysis software POLYFLOW to investigate the influence of different process conditions and structural parameters on mixing characteristics of the eccentric rotor extruder. The intensity of shear and elongational flow strengthened when the rotational speed increased, but the time for material to stay in the extruder will ...

get price

Simulation of Turbulent Flows - Stanford University

Direct Numerical Simulation The objective is to solve the time-dependent NS equations resolving ALL the scale (eddies) for a sufficient time interval so that the fluid ... Mixing Length, Cebeci-Smith, Baldwin-Lomax, etc 2) one-equation models: ... Flow separation and reattachment are strongly dependent on a

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Numerical simulation of shear-thinning flow problems in ...

The method is applied to the numerical simulation of various mixing problems in cylindrical unbaffled vessels. The computations were performed for a real polymer liquid (CMC in water), where the viscosity data were found experimentally and were fitted to a suitable mathematical model.

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Numerical Simulation and Modeling of an Unsteady ...

Braza M., Hanine F. (1998) Numerical Simulation and Modeling of an Unsteady Supersonic Mixing-Layer Flow. In: Dervieux A., Braza M., Dussauge JP. (eds) Computation and Comparison of Efficient Turbulence Models for Aeronautics — European Research Project ETMA. Notes on Numerical

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A Numerical Investigation of Mixing Models in LES-FMDF for ...

In previous studies, the mixing model has been widely investigated for incompressible reactive flows [].Mitarai et al. [] investigated the performance of three mixing models, namely IEM, MC, and EMST, which are implemented in both Reynolds-averaged simulation and large-eddy simulation (LES).The results obtained from the simulation of a fully developed isotropic decaying turbulence showed that ...

get price

Reconstruction of numerical inlet boundary conditions ...

Aug 24, 2021  It is well known that inlet boundary conditions can have a major impact on the results and accuracy of a numerical simulation. Despite many advancements over the past few decades regarding the computational methods, it is still a challenge to specify proper inlet boundary conditions in the case of spatially developing turbulent flows (e.g., jets, mixing layers, and wall-bounded flows).

get price

Numerical simulations of two-fluid turbulent mixing at ...

Nov 28, 2013  Youngs D (2017) Rayleigh–Taylor mixing: direct numerical simulation and implicit large eddy simulation, Physica Scripta, 10.1088/1402-4896/aa732b, 92:7, (074006), Online publication date: 1

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