The Experts below are selected from a list of 15030 Experts worldwide ranked by ideXlab platform
Eric M Furst - One of the best experts on this subject based on the ideXlab platform.
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a simpler expression for henry s function describing the electrophoretic mobility of spherical colloids
Journal of Colloid and Interface Science, 2012Co-Authors: James W Swan, Eric M FurstAbstract:An approximate expression for Henry’s function, describing the electrophoretic mobility of a spherical colloidal particle in the limit of low surface potentials, is developed through a Physical Analogy to a colloidal particle with a linearly slipping surface (i.e. satisfies the Navier slip condition). The resulting expression reproduces Henry’s function with a relative error of no more than 0.1%. This approach is generalized for the electrophoretic mobility of a particle regardless of surface potential though necessary data for rigorous testing is lacking.
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A simpler expression for Henry’s function describing the electrophoretic mobility of spherical colloids
Journal of Colloid and Interface Science, 2012Co-Authors: James W Swan, Eric M FurstAbstract:An approximate expression for Henry’s function, describing the electrophoretic mobility of a spherical colloidal particle in the limit of low surface potentials, is developed through a Physical Analogy to a colloidal particle with a linearly slipping surface (i.e. satisfies the Navier slip condition). The resulting expression reproduces Henry’s function with a relative error of no more than 0.1%. This approach is generalized for the electrophoretic mobility of a particle regardless of surface potential though necessary data for rigorous testing is lacking.
Bruno Andreotti - One of the best experts on this subject based on the ideXlab platform.
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Athermal analogue of sheared dense Brownian suspensions
EPL, 2015Co-Authors: Martin Trulsson, Mehdi Bouzid, Philippe Claudin, Jorge Kurchan, Eric Clément, Bruno AndreottiAbstract:The rheology of dense Brownian suspensions of hard spheres is investigated numerically beyond the low shear rate Newtonian regime. We analyze an athermal analogue of these suspensions, with an effective logarithmic repulsive potential representing the vibrational entropic forces. We show that both systems present the same rheology without adjustable parameters. Moreover, all rheological responses display similar Herschel-Bulkley relations once the shear stress and the shear rate are respectively rescaled by a characteristic stress scale and by a microscopic reorganization time-scale, both related to the normal confining pressure. This pressure-controlled approach, originally developed for granular flows, reveals a striking Physical Analogy between the colloidal glass transition and granular jamming.
James W Swan - One of the best experts on this subject based on the ideXlab platform.
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a simpler expression for henry s function describing the electrophoretic mobility of spherical colloids
Journal of Colloid and Interface Science, 2012Co-Authors: James W Swan, Eric M FurstAbstract:An approximate expression for Henry’s function, describing the electrophoretic mobility of a spherical colloidal particle in the limit of low surface potentials, is developed through a Physical Analogy to a colloidal particle with a linearly slipping surface (i.e. satisfies the Navier slip condition). The resulting expression reproduces Henry’s function with a relative error of no more than 0.1%. This approach is generalized for the electrophoretic mobility of a particle regardless of surface potential though necessary data for rigorous testing is lacking.
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A simpler expression for Henry’s function describing the electrophoretic mobility of spherical colloids
Journal of Colloid and Interface Science, 2012Co-Authors: James W Swan, Eric M FurstAbstract:An approximate expression for Henry’s function, describing the electrophoretic mobility of a spherical colloidal particle in the limit of low surface potentials, is developed through a Physical Analogy to a colloidal particle with a linearly slipping surface (i.e. satisfies the Navier slip condition). The resulting expression reproduces Henry’s function with a relative error of no more than 0.1%. This approach is generalized for the electrophoretic mobility of a particle regardless of surface potential though necessary data for rigorous testing is lacking.
Martin Trulsson - One of the best experts on this subject based on the ideXlab platform.
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Athermal analogue of sheared dense Brownian suspensions
EPL, 2015Co-Authors: Martin Trulsson, Mehdi Bouzid, Philippe Claudin, Jorge Kurchan, Eric Clément, Bruno AndreottiAbstract:The rheology of dense Brownian suspensions of hard spheres is investigated numerically beyond the low shear rate Newtonian regime. We analyze an athermal analogue of these suspensions, with an effective logarithmic repulsive potential representing the vibrational entropic forces. We show that both systems present the same rheology without adjustable parameters. Moreover, all rheological responses display similar Herschel-Bulkley relations once the shear stress and the shear rate are respectively rescaled by a characteristic stress scale and by a microscopic reorganization time-scale, both related to the normal confining pressure. This pressure-controlled approach, originally developed for granular flows, reveals a striking Physical Analogy between the colloidal glass transition and granular jamming.
Bei Wang - One of the best experts on this subject based on the ideXlab platform.
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The number of chained lumped-circuits for the Physical Analogy of half-wavelength power transmission lines
IOP Conference Series: Earth and Environmental Science, 2017Co-Authors: Rongrong Zhan, Meng Jiangwen, Bei WangAbstract:Half-wavelength AC power transmission (HWACT) technology has the special advantage of point-to-point transmission, and hence is very attractive for long-distance (3000km for 50Hz or 2500km for 60 Hz) and large-capacity power transmission. In order to implement Physical Analogy of HWACT lines, in general, the equivalent lumped-circuits consisting of some chained π-type circuits or T-type circuits are used in laboratory. The number of the chained circuits is the most important aspects in the Physical Analogy of HWACT lines. In this paper, the voltage waveform along π-type equivalent circuit is analysed for different number of the chained circuits. Next, the relationship between the number of chained circuits and the wave frequencies is discussed based on the relative error of the cascaded matrix (relative to the transfer matrix). For 50Hz, 32 chained π-type circuits can ensure the relative error of the cascaded matrix is less than 3%. The greater frequency is, the more the number of chained circuits required to establish good equivalence between the lumped-circuits and the transmission line. These works are instructive for the Physical Analogy of HWACT lines.
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The number of chained π-type circuits for dynamic Analogy of half-wavelength transmission line considering short-circuit fault
2017 Sixth Asia-Pacific Conference on Antennas and Propagation (APCAP), 2017Co-Authors: Li Yurong, Chongqing Jiao, Bei WangAbstract:The Physical Analogy is one of the key technologies to study the characteristics of half-wavelength transmission line. Dynamic model test is the main technical means of Physical Analogy. In general, the equivalent lumped-circuits consisting of some chained π-type circuits or T-type circuits are used to Analogy transmission line, and the number of the chained circuits is the most key parameter to to establish dynamic test of transmission line. In this paper, firstly, a rigorous derivation of a π-type circuit analogized by the method of order parameter equivalence is carried out. Then, the simulation of the half-wavelength transmission line with different number of the chained circuits is carried out from the transient characteristics. Finally, the voltage changes at each observation point after the short-circuit fault are analyzed and compared. It is shown that when the short-circuit point is close to the middle of the line, the required number of the chained circuits will be less, while the short-circuit point is near the end of the line, the required number of the chained circuits will be more. When the short-circuit fault occurs in the middle of the line, 10 chained π-type circuits can establish good equivalence between the lumped-circuits and the 3000km transmission line; When the short-circuit fault occurs near the end of the line, increasing the chained number to 37 is enough; When the short-circuit fault occurs in other parts of the line, it is enough to use 17 chained π-type circuits to equivalent the 3000km transmission line. Considering the uncertainty of the location of the short-circuit fault, it is enough to use 37 chained π-type circuits to equivalent the half-wavelength transmission line. Considering the uncertainty of the location of the short-circuit fault, it is enough to use 37 chained π-type circuits to equivalent the half-wavelength transmission line. These works are instructive for the Physical Analogy of HWACT lines.