The Experts below are selected from a list of 17349 Experts worldwide ranked by ideXlab platform
Peter Hartmann - One of the best experts on this subject based on the ideXlab platform.
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Shear viscosity of strongly coupled Yukawa liquids
Physical Review E, 2008Co-Authors: Zoltán Donkó, Peter HartmannAbstract:We present molecular-dynamics calculations of the Shear viscosity of three-dimensional strongly coupled Yukawa liquids which are frequently used as a model system of complex plasmas. The results obtained using two independent nonequilibrium simulation methods are critically compared with each other and with earlier published data for a wide range of plasma coupling and screening parameters. The non-Newtonian behavior of the liquid, manifested as a descrease of the Shear viscosity with Increasing Shear Rate Shear thinning, and the validity of the Stokes-Einstein relation at high coupling strength are also demonstRated.
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Shear viscosity and Shear thinning in two-dimensional Yukawa liquids
Physical review letters, 2006Co-Authors: Zoltán Donkó, John Goree, Peter Hartmann, Kinga KutasiAbstract:A two-dimensional Yukawa liquid is studied using two different nonequilibrium molecular dynamics simulation methods. Shear viscosity values in the limit of small Shear Rates are reported for a wide range of Coulomb coupling parameter and screening lengths. At high Shear Rates it is demonstRated that this liquid exhibits Shear thinning; i.e., the viscosity $\ensuremath{\eta}$ diminishes with Increasing Shear Rate. It is expected that two-dimensional dusty plasmas will exhibit this effect.
Zoltán Donkó - One of the best experts on this subject based on the ideXlab platform.
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Shear viscosity of strongly coupled Yukawa liquids
Physical Review E, 2008Co-Authors: Zoltán Donkó, Peter HartmannAbstract:We present molecular-dynamics calculations of the Shear viscosity of three-dimensional strongly coupled Yukawa liquids which are frequently used as a model system of complex plasmas. The results obtained using two independent nonequilibrium simulation methods are critically compared with each other and with earlier published data for a wide range of plasma coupling and screening parameters. The non-Newtonian behavior of the liquid, manifested as a descrease of the Shear viscosity with Increasing Shear Rate Shear thinning, and the validity of the Stokes-Einstein relation at high coupling strength are also demonstRated.
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Shear viscosity and Shear thinning in two-dimensional Yukawa liquids
Physical review letters, 2006Co-Authors: Zoltán Donkó, John Goree, Peter Hartmann, Kinga KutasiAbstract:A two-dimensional Yukawa liquid is studied using two different nonequilibrium molecular dynamics simulation methods. Shear viscosity values in the limit of small Shear Rates are reported for a wide range of Coulomb coupling parameter and screening lengths. At high Shear Rates it is demonstRated that this liquid exhibits Shear thinning; i.e., the viscosity $\ensuremath{\eta}$ diminishes with Increasing Shear Rate. It is expected that two-dimensional dusty plasmas will exhibit this effect.
Kinga Kutasi - One of the best experts on this subject based on the ideXlab platform.
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Shear viscosity and Shear thinning in two-dimensional Yukawa liquids
Physical review letters, 2006Co-Authors: Zoltán Donkó, John Goree, Peter Hartmann, Kinga KutasiAbstract:A two-dimensional Yukawa liquid is studied using two different nonequilibrium molecular dynamics simulation methods. Shear viscosity values in the limit of small Shear Rates are reported for a wide range of Coulomb coupling parameter and screening lengths. At high Shear Rates it is demonstRated that this liquid exhibits Shear thinning; i.e., the viscosity $\ensuremath{\eta}$ diminishes with Increasing Shear Rate. It is expected that two-dimensional dusty plasmas will exhibit this effect.
Jdr Jens Harting - One of the best experts on this subject based on the ideXlab platform.
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slip flow over structured surfaces with entrapped microbubbles
Physical Review Letters, 2008Co-Authors: Jari Hyvaluoma, Jdr Jens HartingAbstract:On hydrophobic surfaces, roughness may lead to a transition to a superhydrophobic state, where gas bubbles at the surface can have a strong impact on a detected slip. We present two-phase lattice Boltzmann simulations of a Couette flow over structured surfaces with attached gas bubbles. Even though the bubbles add slippery surfaces to the channel, they can cause negative slip to appear due to the increased roughness. The simulation method used allows the bubbles to deform due to viscous stresses. We find a decrease of the detected slip with Increasing Shear Rate which is in contrast to some recent experimental results implicating that bubble deformation cannot account for these experiments. Possible applications of bubble surfaces in microfluidic devices are discussed.
Kell Mortensen - One of the best experts on this subject based on the ideXlab platform.
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Behavior of a Charged Vesicle System under the Influence of a Shear Gradient: A Microstructural Study
The Journal of Physical Chemistry B, 1998Co-Authors: M. Bergmeier, M. Gradzielski, Heinz Hoffmann, Kell MortensenAbstract:The influence of Shear on charged vesicles was studied by means of rheology, anisotropy of the electrical conductivity, electron microscopy, and SANS. The vesicles in the aqueous system TDMAO/TTABr/n-hexanol are multilamellar, polydisperse in size, and densely packed, which results in elastic properties and a yield stress. It is shown that the vesicles decrease in size with Increasing Shear Rate and small unilamellar vesicles are formed that are found to be stable and do not relax back to the original state. Thus Shearing is proofed to be a suitable method for size control of vesicles.
