numerical modeling of chaotic mixing in electroosmotically
Welcome to Cina Charm

numerical modeling of chaotic mixing in electroosmotically .

Numerical Modeling of Chaotic Mixing in Electroosmotically ...

2009-6-24  Mixing efficiency is quantified using the mixing index, based on standard deviation of the scalar species distribution. The mixing length (l m) is characterized as a function of the Peclet number and l m ∝ ln (Pe) scaling is observed for the fully chaotic flow case. Objectives of this study include the presentation and characterization of the ...

Get Price

Numerical Modeling of Chaotic Mixing in Electroosmotically ...

Numerical simulation of a recent model of chaotic mixing reveals a vortexlike stirring effect in quasiperiodic islands of the Poincaré map of the flow, which strongly influences the mixing time.

Get Price

Numerical Studies of Mixing in an Electroosmotically ...

2009-5-22  Numerical Modeling of Chaotic Mixing in Electroosmotically Stirred Continuous Flow Mixers J. Heat Transfer (September,2009) Liquid Flow Forced Convection in Rectangular Microchannels With Nonuniform Heating: Toward Analytical Modeling of Hotspots

Get Price

Numerical and experimental investigations of chaotic ...

2017-11-2  Numerical and experimental investigations of chaotic mixing behavior in an oscillating feedback micromixer. ... indeed are a valid alternative way to investigate the chaotic advection mixing. 4. Numerical treatment. ... Numerical modeling of chaotic mixing in electroosmotically stirred continuous flow mixers. J. Heat Transfer, 131 (9) ...

Get Price

A new representative measure of chaotic mixing in a chaos ...

1999-1-20  Ho Jun Kim, Ali Beskok, Numerical Modeling of Chaotic Mixing in Electroosmotically Stirred Continuous Flow Mixers, Journal of Heat Transfer, 10.1115/1.3139109, 131, 9,

Get Price

A Chaotic Electroosmotic Stirrer Analytical Chemistry

2002-6-14  Chaotic mixing in electro-osmotic flows driven by spatiotemporal surface charge modulation. Physics of Fluids 2009, 21 (5) , 052004. DOI: 10.1063/1.3139162. Ho Jun Kim, Ali Beskok. Numerical Modeling of Chaotic Mixing in Electroosmotically Stirred Continuous Flow Mixers.

Get Price

Quantification of chaotic strength and mixing in a micro ...

the numerical solution of species transport equations, where species mixing in partially and globally chaotic states is demonstrated. Mixing results are presented as a function of the ‘Mixing Index Inverse (M−1)’. Finally, we summarize our findings in the discussion section. Flow model

Get Price

Experimental and numerical investigation of thermal ...

2011-4-17  In this paper, thermal chaotic mixing characteristics of two miscible fluids in a T-shaped microchannel are investigated experimentally and numerically. In the experiments, fluorescent dye Acid Yellow and Rhodamine B was employed to show the mass mixing behavior and temperature field, respectively. Power input and flow rate were studied to investigate the thermal mixing characteristics

Get Price

Evaluation of Microchamber Geometries and Surface ...

2004-5-12  The paper presents numerical simulations and analysis of electrokinetic induced mixing in a microchamber in the presence of a fluctuating electric field. Two microchamber geometries are investigated; one plain and the other with strategically placed microbaffles. Both geometries are tested for two extreme surface conditions: a charged surface with induced electrokinesis and another with a ...

Get Price

Group Members Biomicrofluidics Lab

Saurabh Kumar, “Numerical Simulation of Micro-Fluidic Passive and Active Mixers,” 8/2002 (TAMU). Pradipkumar Bahukudumbi, “A Phenomenological Model for Rarefied Gas Flows in Thin-Film Slider Bearings,” 12/2002 (TAMU). Ho Jun Kim, “Numerical Simulation of Chaotic Advection and Mixing in Microfluidic Systems,” 8/2004 (TAMU).

Get Price

Numerical analysis of electroosmotic mixing in a ...

2021-8-12  Electroosmotic mixing and flow rate are analyzed in a heterogeneous charged micromixer with obstacles. • Obstacles are arranged both inline and staggered order by varying the obstruction angle (θ).For inline order of obstacles, mixing efficiency (ME) decreases with Debye parameter (κ).For staggered arrangement, ME depends on zeta potential and θ, and variation with κ is non-monotonic.

Get Price

Experimental and numerical investigation of thermal ...

2011-4-17  In this paper, thermal chaotic mixing characteristics of two miscible fluids in a T-shaped microchannel are investigated experimentally and numerically. In the experiments, fluorescent dye Acid Yellow and Rhodamine B was employed to show the mass mixing behavior and temperature field, respectively. Power input and flow rate were studied to investigate the thermal mixing characteristics

Get Price

Transient micromixing: Examples of laminar and chaotic ...

The mixing time is found to scale with Peclet number as a power law, but the power-law exponent depends on the level of homogeneity desired in the final state. Numerical simulation of a recent model of chaotic mixing reveals a vortexlike stirring effect in quasiperiodic islands of the Poincare map of the flow, which strongly influences the ...

Get Price

Numerical modeling of DNA-chip hybridization with chaotic ...

2013-6-3  We present numerical simulations of DNA-chip hybridization, both in the "static" and "dynamical" cases. In the static case, transport of free targets is limited by molecular diffusion; in the dynamical case, an efficient mixing is achieved by chaotic advection, with a periodic protocol using pumps in a rectangular chamber.

Get Price

Numerical Investigation of Electro-osmotic Flow of Fluid ...

2021-8-14  Mixing index has been evaluated and compared with simple T-mixer serpentine microchannel. Analyses of mixing and flow field have been carried out for a wide range of Reynolds number from 0.1 to ...

Get Price

Flow melanges: Numerical modeling and geologic

Mixing is enhanced because differences in block size and density cause differential settling of large blocks within the nonuniform velocity field. Oblique convergence cause;s blocks to take helical paths and may explain the dispersal of blocks such as eclogite along the length of the Franciscan from a few localized sources.

Get Price

A numerical study of viscoelastic effects in chaotic ...

A numerical study of viscoelastic effects in chaotic mixing between eccentric cylinders - Volume 412. ... The effect of shear thinning and differential viscoelasticity on mixing in a model 2D mixer as determined using FEM with particle tracking. Journal of Non-Newtonian Fluid Mechanics, Vol. 123, Issue. 1, p.

Get Price

Numerical study of enhanced mixing in pressure-driven ...

2017-9-29  We propose an innovative mechanism for enhancing mixing in steady pressure driven flow of an electrolytic solution in a straight rectangular microchannel. A transverse electric field is used to generate an electroosmotic flow across the cross-section. The resulting flow field consists of a pair of helical vortices that transport fluid elements along the channel. We show, through numerical ...

Get Price

Cross-Jet Lagrangian Transport and Mixing in a 2 -Layer

2013-11-28  Cross-stream mixing and Lagrangian transport caused by chaotic advection within a baroclinic (2‰ layer) meandering jet are investigated. The quasi-steady meanders arise as a result of evolution from an initial small-amplitude instability. The investigation keys on the proposition, made in earlier work, that the cross-jet mixing

Get Price

Direct numerical simulation of elastic turbulence and its ...

In this paper, we present a direct numerical simulation (DNS) of elastic turbulence of viscoelastic fluid at vanishingly low Reynolds number (Re=1) in a three-dimensional straight channel flow for the first time, using the Giesekus constitutive model for the fluid. In order to generate and maintain the turbulent fluid motion in the straight channel, a sinusoidal force term is added to the ...

Get Price

Numerical modeling of DNA-chip hybridization with chaotic ...

2013-6-3  We present numerical simulations of DNA-chip hybridization, both in the “static” and “dynamical” cases. In the static case, transport of free targets is limited by molecular diffusion; in the dynamical case, an efficient mixing is achieved by chaotic advection, with a periodic protocol using pumps in a rectangular chamber. This protocol has been shown to achieve rapid and homogeneous ...

Get Price

Numerical modeling of DNA-chip hybridization with chaotic ...

2013-6-3  We present numerical simulations of DNA-chip hybridization, both in the "static" and "dynamical" cases. In the static case, transport of free targets is limited by molecular diffusion; in the dynamical case, an efficient mixing is achieved by chaotic advection, with a periodic protocol using pumps in a rectangular chamber.

Get Price

Introduction of a chaotic dough mixer, part A ...

2013-5-1  The motivation of this work is to propose a special dough mixer with chaotic advection to take advantage of high performance mixing in chaotic mixers and to develop typical dough mixers. In order to prevent common difficulties encountered due to the dynamic mesh, a mathematical model was employed based on neglecting the transient term of the momentum equation using conceptual features from ...

Get Price

Flow melanges: Numerical modeling and geologic

Mixing is enhanced because differences in block size and density cause differential settling of large blocks within the nonuniform velocity field. Oblique convergence cause;s blocks to take helical paths and may explain the dispersal of blocks such as eclogite along the length of the Franciscan from a few localized sources.

Get Price

Mathematical Modeling of Oceanic Phytoplankton

2014-11-6  alytical results combined with numerical modeling have found critical length scales of the problem and critical ratios of biological reaction to turbulent time scales for these assumptions [12,16]. In [36], the authors develop theory and numerical models to link the critical turbulence hypothesis to the shutdown to convective mixing due to

Get Price

Cross-Jet Lagrangian Transport and Mixing in a 2 -Layer

2013-11-28  Cross-stream mixing and Lagrangian transport caused by chaotic advection within a baroclinic (2‰ layer) meandering jet are investigated. The quasi-steady meanders arise as a result of evolution from an initial small-amplitude instability. The investigation keys on the proposition, made in earlier work, that the cross-jet mixing

Get Price

Chaotic Mixer for Microchannels Science

2002-1-25  It is difficult to mix solutions in microchannels. Under typical operating conditions, flows in these channels are laminar—the spontaneous fluctuations of velocity that tend to homogenize fluids in turbulent flows are absent, and molecular diffusion across the channels is slow. We present a passive method for mixing streams of steady pressure-driven flows in microchannels at low Reynolds number.

Get Price

Chaotic Mixing Analyzing in Continuous Mixer with

2020-10-18  The mixing in continuous mixer had been studied with a mathematical model or numerical simulation in past decades under some idea assumptions [19–23]. Although some pioneer visualization researches [13,24–26] had been done for continuous mixer or batch mixer, the chaotic mixing process was hardly experimentally and visually presented owing ...

Get Price

Numerical simulation of distributive mixing in 3‐D flows ...

A numerical simulation is performed for analysing the mixing of the stirring tank. The influence of the stirring tank geometry and of the Reynolds number is investigated. Statistical tools are used f...

Get Price

Numerical and Experimental Study on Mixing

2018-4-27  2. Physical and Numerical Model The basic concept of increasing the mixing of fluids has utilized the vortex flow formed by the fluid streams flowing through non-aligned inlet channels into the mixing channel (See Figure1). Schematics of the physical models of simple and vortex micro T-mixers are shown in Figure2. The width (200 m),

Get Price
Copyright © 2021.Cina Charm All rights reserved.Cina Charm