Incompressible SPH modeling and analysis of non-Newtonian power-law fluids, mixing in a microchannel with an oscillating stirrer

Shamsoddini, Rahim; Sefid, Mohammad; Fatehi, Rouhollah

doi:10.1007/s12206-015-1234-3

Cited by 26 publications

(3 citation statements)

References 35 publications

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“…The periodic pattern is representative of the KH instability at the jet surface, a roughly constant time delay is observed. The CSD between (P 10 ,P 15 ), (P 10 ,P 20 ) and (P 10 ,P 25 ) are depicted in Fig. 8 (bottom).…”

Section: Newtonian Liquid At Different Ambient Pressuresmentioning

confidence: 99%

“…Finally, Chaussonnet et al [12] investigated the air-assisted atomization of a viscous liquid at atmospheric pressure in a geometry similar to the one of the present study. In the field of non-newtonian SPH, Shao et al [13] investigated the behavior of mud in the dam break configuration, Hosseini et al [14] applied different rheological models in several simple test-cases, and Shamsoddini et al [15] simulated the industrial configuration of an active micro-mixer with a power-law fluid. Finally Qiang et al [16] studied the breakup of two impinging power-law liquid jets.…”

Section: Introductionmentioning

confidence: 99%

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Smoothed Particle Hydrodynamics Simulation of an Air-Assisted Atomizer Operating at High Pressure: Influence of Non-Newtonian Effects

Chaussonnet

Koch

Bauer

et al. 2018

Journal of Fluids Engineering

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A twin-fluid atomizer configuration is predicted by means of the 2D weakly-compressible Smooth Particle Hydrodynamics (SPH) method and compared to experiments. The setup consists of an axial liquid jet fragmented by a co-flowing high-speed air stream (U g ≈ 60 m/s) in a pressurized atmosphere up to 11 bar (abs.). Two types of liquid are investigated: a viscous Newtonian liquid (µ l = 200 mPa s) obtained with a glycerol/water mixture and a viscous non-Newtonian liquid (µ l,apparent. ≈ 150 mPa s) obtained with a carboxymethyl cellulose (CMC) solution. 3D effects are taken into account in the 2D code by introducing (i) a surface tension term, (ii) a cylindrical viscosity operator and (iii) a modified velocity accounting for the divergence of the volume in the radial direction. The numerical results at high pressure show a good qualitative agreement with experiment, i.e. a correct transition of the atomization regimes with regard to the pressure, and similar dynamics and length scales of the generated ligaments. The predicted frequency of the Kelvin-Helmholtz instability needs a correction factor of 2 to be globally well recovered with the Newtonian liquid. The simulation of the non-Newtonian liquid at high pressure shows a similar breakup regime with finer droplets compared to Newtonian liquids while the simulation at atmospheric pressure shows an apparent viscosity similar to the experiment. NOMENCLATURE *

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Section: Newtonian Liquid At Different Ambient Pressuresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Smoothed Particle Hydrodynamics Simulation of an Air-Assisted Atomizer Operating at High Pressure: Influence of Non-Newtonian Effects

Chaussonnet

Koch

Bauer

et al. 2018

Journal of Fluids Engineering

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“…As mentioned above, active micromixers with stir-bars have been investigated numerically using LBM (An et al 2006, Kim et al 2007, Park et al 2008, Ryu et al 2011. These types of micromixers have also been modeled and investigated by the SPH method (Shamsoddini et al 2014, , Shamsoddini et al 2016. All the above studies were performed for low Schmidt numbers (Sc10).…”

Section: Introductionmentioning

confidence: 99%

SPH investigation of the thermal effects on the fluid mixing in a microchannel with rotating stirrers

Shamsoddini

2018

Fluid Dyn. Res.

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An incompressible smoothed particle hydrodynamics algorithm is proposed to model and investigate the thermal effect on the mixing rate of an active micromixer in which the rotating stirrers enhance the mixing rate. In liquids, mass diffusion increases with increasing temperature, while viscosity decreases; so, the local Schmidt number decreases considerably with increasing temperature. The present study investigates the effect of wall temperature on mixing rate with an improved SPH method. The robust SPH method used in the present work is equipped with a shifting algorithm and renormalization tensors. By introducing this new algorithm, the several mass, momentum, energy, and concentration equations are solved. The results, discussed for different temperature ratios, show that mixing rate increases significantly with increased temperature ratio.

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A Review of Enhanced Micromixing Techniques in Microfluidics for the Application in Wastewater Analysis

Mahmud

Tamrin

Sheikh

2020

Advances in Waste Processing Technology

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Incompressible SPH modeling and analysis of non-Newtonian power-law fluids, mixing in a microchannel with an oscillating stirrer

Cited by 26 publications

References 35 publications

Smoothed Particle Hydrodynamics Simulation of an Air-Assisted Atomizer Operating at High Pressure: Influence of Non-Newtonian Effects

Smoothed Particle Hydrodynamics Simulation of an Air-Assisted Atomizer Operating at High Pressure: Influence of Non-Newtonian Effects

SPH investigation of the thermal effects on the fluid mixing in a microchannel with rotating stirrers

A Review of Enhanced Micromixing Techniques in Microfluidics for the Application in Wastewater Analysis

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