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Michal Borkovec - One of the best experts on this subject based on the ideXlab platform.

  • interaction between charged surfaces on the poisson boltzmann level the constant regulation approximation
    Journal of Physical Chemistry B, 2004
    Co-Authors: Ramon Pericetcamara, Sven Holger Behrens, Georg Papastavrou, Michal Borkovec
    Abstract:

    Interaction forces between ionizable surfaces across an electrolyte solution on the Poisson−Boltzmann level are discussed within the constant regulation approximation. The chemical response of each surface is expressed in terms of two parameters, namely, the diffuse layer potential and the regulation parameter p. Both parameters are easily available because they arise naturally within Classical equilibrium models for a single noninteracting surface. This approximation, thus, eliminates the need to treat the more intricate problem of two chemical adsorption equilibria coupled to the overlapping double layers between the surfaces. The ensuing simplicity makes this approach extremely versatile for the analysis of experimental data. The Classical Boundary Condition of constant potential corresponds to p = 0, and that of constant charge corresponds to p = 1. While this approximation is rigorously correct at large separations, we find that it remains excellent down to contact in many realistic situations, such ...

  • interaction between charged surfaces on the poisson boltzmann level the constant regulation approximation
    Journal of Physical Chemistry B, 2004
    Co-Authors: Ramon Pericetcamara, Sven Holger Behrens, Georg Papastavrou, Michal Borkovec
    Abstract:

    Interaction forces between ionizable surfaces across an electrolyte solution on the Poisson-Boltzmann level are discussed within the constant regulation approximation. The chemical response of each surface is expressed in terms of two parameters, namely, the diffuse layer potential and the regulation parameter p. Both parameters are easily available because they arise naturally within Classical equilibrium models for a single noninteracting surface. This approximation, thus, eliminates the need to treat the more intricate problem of two chemical adsorption equilibria coupled to the overlapping double layers between the surfaces. The ensuing simplicity makes this approach extremely versatile for the analysis of experimental data. The Classical Boundary Condition of constant potential corresponds to p = 0, and that of constant charge corresponds to p = 1. While this approximation is rigorously correct at large separations, we find that it remains excellent down to contact in many realistic situations, such as in symmetric or asymmetric systems involving metal oxides or silica described by the 1-pK basic Stern model.

Yongjun Jian - One of the best experts on this subject based on the ideXlab platform.

  • streaming potential and heat transfer of nanofluids in parallel plate microchannels
    Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2016
    Co-Authors: Guangpu Zhao, Yongjun Jian
    Abstract:

    In the present study, the heat transfer characteristics of thermally developed nanofluid flow through a parallel plate microchannel are investigated under combined influences of pressure-driven and streaming potential effects. The analytical solution for electrokinetic flow in microchannel is obtained by employing the Debye–Huckel linearization. The Classical Boundary Condition of uniform wall heat flux is considered in the analysis, and the effects of viscous dissipation as well as Joule heating are also taken into account. Furthermore, based upon the velocity field and temperature field, the Nusselt number variations are induced, and the variations of local and total entropy generation of nanofluids are also performed. Concisely, the results show the profiles of streaming potential decrease with the dimensionless EDL thickness, whereas the Nusselt number increases with the dimensionless EDL thickness. An enhanced heat transfer performance with increasing nanoparticle volume fraction can be witnessed. The local entropy generation gradually grows from the centerline toward the wall. Beside, the total entropy generation obviously grows with increasing Br.

  • streaming potential and heat transfer of nanofluids in microchannels in the presence of magnetic field
    Journal of Magnetism and Magnetic Materials, 2016
    Co-Authors: Guangpu Zhao, Yongjun Jian
    Abstract:

    Abstract In this work, we investigate the heat transfer characteristics of thermally developed nanofluid flow through a parallel plate microchannel under the combined influences of externally applied axial pressure gradient and transverse magnetic fields. The analytical solutions for electromagnetohydrodynamic (EMHD) flow in microchannels are obtained under the Debye–Huckel linearization. The Classical Boundary Condition of uniform wall heat flux is considered in the analysis, and the effect of viscous dissipation as well as Joule heating is also taken into account. In addition, in virtue of the velocity field and temperature field, the Nusselt number variations are induced. The results for pertinent dimensionless parameters are presented graphically and discussed in briefly.

Ramon Pericetcamara - One of the best experts on this subject based on the ideXlab platform.

  • interaction between charged surfaces on the poisson boltzmann level the constant regulation approximation
    Journal of Physical Chemistry B, 2004
    Co-Authors: Ramon Pericetcamara, Sven Holger Behrens, Georg Papastavrou, Michal Borkovec
    Abstract:

    Interaction forces between ionizable surfaces across an electrolyte solution on the Poisson−Boltzmann level are discussed within the constant regulation approximation. The chemical response of each surface is expressed in terms of two parameters, namely, the diffuse layer potential and the regulation parameter p. Both parameters are easily available because they arise naturally within Classical equilibrium models for a single noninteracting surface. This approximation, thus, eliminates the need to treat the more intricate problem of two chemical adsorption equilibria coupled to the overlapping double layers between the surfaces. The ensuing simplicity makes this approach extremely versatile for the analysis of experimental data. The Classical Boundary Condition of constant potential corresponds to p = 0, and that of constant charge corresponds to p = 1. While this approximation is rigorously correct at large separations, we find that it remains excellent down to contact in many realistic situations, such ...

  • interaction between charged surfaces on the poisson boltzmann level the constant regulation approximation
    Journal of Physical Chemistry B, 2004
    Co-Authors: Ramon Pericetcamara, Sven Holger Behrens, Georg Papastavrou, Michal Borkovec
    Abstract:

    Interaction forces between ionizable surfaces across an electrolyte solution on the Poisson-Boltzmann level are discussed within the constant regulation approximation. The chemical response of each surface is expressed in terms of two parameters, namely, the diffuse layer potential and the regulation parameter p. Both parameters are easily available because they arise naturally within Classical equilibrium models for a single noninteracting surface. This approximation, thus, eliminates the need to treat the more intricate problem of two chemical adsorption equilibria coupled to the overlapping double layers between the surfaces. The ensuing simplicity makes this approach extremely versatile for the analysis of experimental data. The Classical Boundary Condition of constant potential corresponds to p = 0, and that of constant charge corresponds to p = 1. While this approximation is rigorously correct at large separations, we find that it remains excellent down to contact in many realistic situations, such as in symmetric or asymmetric systems involving metal oxides or silica described by the 1-pK basic Stern model.

Guangpu Zhao - One of the best experts on this subject based on the ideXlab platform.

  • streaming potential and heat transfer of nanofluids in parallel plate microchannels
    Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2016
    Co-Authors: Guangpu Zhao, Yongjun Jian
    Abstract:

    In the present study, the heat transfer characteristics of thermally developed nanofluid flow through a parallel plate microchannel are investigated under combined influences of pressure-driven and streaming potential effects. The analytical solution for electrokinetic flow in microchannel is obtained by employing the Debye–Huckel linearization. The Classical Boundary Condition of uniform wall heat flux is considered in the analysis, and the effects of viscous dissipation as well as Joule heating are also taken into account. Furthermore, based upon the velocity field and temperature field, the Nusselt number variations are induced, and the variations of local and total entropy generation of nanofluids are also performed. Concisely, the results show the profiles of streaming potential decrease with the dimensionless EDL thickness, whereas the Nusselt number increases with the dimensionless EDL thickness. An enhanced heat transfer performance with increasing nanoparticle volume fraction can be witnessed. The local entropy generation gradually grows from the centerline toward the wall. Beside, the total entropy generation obviously grows with increasing Br.

  • streaming potential and heat transfer of nanofluids in microchannels in the presence of magnetic field
    Journal of Magnetism and Magnetic Materials, 2016
    Co-Authors: Guangpu Zhao, Yongjun Jian
    Abstract:

    Abstract In this work, we investigate the heat transfer characteristics of thermally developed nanofluid flow through a parallel plate microchannel under the combined influences of externally applied axial pressure gradient and transverse magnetic fields. The analytical solutions for electromagnetohydrodynamic (EMHD) flow in microchannels are obtained under the Debye–Huckel linearization. The Classical Boundary Condition of uniform wall heat flux is considered in the analysis, and the effect of viscous dissipation as well as Joule heating is also taken into account. In addition, in virtue of the velocity field and temperature field, the Nusselt number variations are induced. The results for pertinent dimensionless parameters are presented graphically and discussed in briefly.

Sven Holger Behrens - One of the best experts on this subject based on the ideXlab platform.

  • interaction between charged surfaces on the poisson boltzmann level the constant regulation approximation
    Journal of Physical Chemistry B, 2004
    Co-Authors: Ramon Pericetcamara, Sven Holger Behrens, Georg Papastavrou, Michal Borkovec
    Abstract:

    Interaction forces between ionizable surfaces across an electrolyte solution on the Poisson−Boltzmann level are discussed within the constant regulation approximation. The chemical response of each surface is expressed in terms of two parameters, namely, the diffuse layer potential and the regulation parameter p. Both parameters are easily available because they arise naturally within Classical equilibrium models for a single noninteracting surface. This approximation, thus, eliminates the need to treat the more intricate problem of two chemical adsorption equilibria coupled to the overlapping double layers between the surfaces. The ensuing simplicity makes this approach extremely versatile for the analysis of experimental data. The Classical Boundary Condition of constant potential corresponds to p = 0, and that of constant charge corresponds to p = 1. While this approximation is rigorously correct at large separations, we find that it remains excellent down to contact in many realistic situations, such ...

  • interaction between charged surfaces on the poisson boltzmann level the constant regulation approximation
    Journal of Physical Chemistry B, 2004
    Co-Authors: Ramon Pericetcamara, Sven Holger Behrens, Georg Papastavrou, Michal Borkovec
    Abstract:

    Interaction forces between ionizable surfaces across an electrolyte solution on the Poisson-Boltzmann level are discussed within the constant regulation approximation. The chemical response of each surface is expressed in terms of two parameters, namely, the diffuse layer potential and the regulation parameter p. Both parameters are easily available because they arise naturally within Classical equilibrium models for a single noninteracting surface. This approximation, thus, eliminates the need to treat the more intricate problem of two chemical adsorption equilibria coupled to the overlapping double layers between the surfaces. The ensuing simplicity makes this approach extremely versatile for the analysis of experimental data. The Classical Boundary Condition of constant potential corresponds to p = 0, and that of constant charge corresponds to p = 1. While this approximation is rigorously correct at large separations, we find that it remains excellent down to contact in many realistic situations, such as in symmetric or asymmetric systems involving metal oxides or silica described by the 1-pK basic Stern model.