Simulation of mixed electroosmotic/pressure-driven flows by utilizing dissipative particle dynamics

Mehboudi, Aryan; Noruzitabar, Mahdieh; Mehboudi, Masoumeh

doi:10.1007/s10404-013-1287-5

Cited by 7 publications

(1 citation statement)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, an electro-osmotic pump without moving parts [3,4] and an energy-harvesting device using the driving force induced by the salt-concentration gradient [5] have been proposed very recently. Along with the expectations for engineering applications, fundamental research relevant to electrokinetic phenomena in small-scale systems, ranging from nano-to micrometers, has also attracted attention [6][7][8][9][10][11][12][13][14][15]. Particularly, the advances in observing and processing techniques have prompted research focusing on surface properties such as roughness and structure [16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Analysis of electro-osmotic flow in a microchannel with undulated surfaces

2016

View full text Add to dashboard Cite

The electro-osmotic flow through a channel between two undulated surfaces induced by an external electric field is investigated. The gap of the channel is very small and comparable to the thickness of the electrical double layers. A lattice Boltzmann simulation is carried out on the model consisting of the Poisson equation for electrical potential, the Nernst-Planck equation for ion concentration, and the Navier-Stokes equations for flows of the electrolyte solution. An analytical model that predicts the flow rate is also derived under the assumption that the channel width is very small compared with the characteristic length of the variation along the channel. The analytical results are compared with the numerical results obtained by using the lattice Boltzmann method. In the case of a constant surface charge density along the channel, the variation of the channel width reduces the electro-osmotic flow, and the flow rate is smaller than that of a straight channel. In the case of a surface charge density distributed inhomogeneously, one-way flow occurs even under the restriction of a zero net surface charge along the channel.

show abstract

Section: Introductionmentioning

confidence: 99%

Analysis of electro-osmotic flow in a microchannel with undulated surfaces

2016

View full text Add to dashboard Cite

show abstract

Parametric study of fluid–solid interaction for single-particle dissipative particle dynamics model

Wang

Ouyang

2018

Microfluid Nanofluid

View full text Add to dashboard Cite

cDPD: A new dissipative particle dynamics method for modeling electrokinetic phenomena at the mesoscale

Deng

Borodin

et al. 2016

The Journal of Chemical Physics

View full text Add to dashboard Cite

We develop a “charged” dissipative particle dynamics (cDPD) model for simulating mesoscopic electrokinetic phenomena governed by the stochastic Poisson-Nernst-Planck and the Navier-Stokes equations. Specifically, the transport equations of ionic species are incorporated into the DPD framework by introducing extra degrees of freedom and corresponding evolution equations associated with each DPD particle. Diffusion of ionic species driven by the ionic concentration gradient, electrostatic potential gradient, and thermal fluctuations is captured accurately via pairwise fluxes between DPD particles. The electrostatic potential is obtained by solving the Poisson equation on the moving DPD particles iteratively at each time step. For charged surfaces in bounded systems, an effective boundary treatment methodology is developed for imposing both the correct hydrodynamic and electrokinetics boundary conditions in cDPD simulations. To validate the proposed cDPD model and the corresponding boundary conditions, we first study the electrostatic structure in the vicinity of a charged solid surface, i.e., we perform cDPD simulations of the electrostatic double layer and show that our results are in good agreement with the well-known mean-field theoretical solutions. We also simulate the electrostatic structure and capacity densities between charged parallel plates in salt solutions with different salt concentrations. Moreover, we employ the proposed methodology to study the electro-osmotic and electro-osmotic/pressure-driven flows in a micro-channel. In the latter case, we simulate the dilute poly-electrolyte solution drifting by electro-osmotic flow in a micro-channel, hence demonstrating the flexibility and capability of this method in studying complex fluids with electrostatic interactions at the micro- and nano-scales.

show abstract

Simulation of mixed electroosmotic/pressure-driven flows by utilizing dissipative particle dynamics

Cited by 7 publications

References 48 publications

Analysis of electro-osmotic flow in a microchannel with undulated surfaces

Analysis of electro-osmotic flow in a microchannel with undulated surfaces

Parametric study of fluid–solid interaction for single-particle dissipative particle dynamics model

cDPD: A new dissipative particle dynamics method for modeling electrokinetic phenomena at the mesoscale

Contact Info

Product

Resources

About