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  • World Scientific Pub Co Pte Ltd  (15)
  • LU, KUNQUAN  (15)
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  • World Scientific Pub Co Pte Ltd  (15)
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  • 1
    Online Resource
    Online Resource
    THE METHODS FOR MEASURING SHEAR STRESS OF POLAR MOLECULE DOMINATED ER FLUIDS
    World Scientific Pub Co Pte Ltd ; 2007
    In:  International Journal of Modern Physics B Vol. 21, No. 28n29 ( 2007-11-10), p. 4813-4818
    Details
    In: International Journal of Modern Physics B, World Scientific Pub Co Pte Ltd, Vol. 21, No. 28n29 ( 2007-11-10), p. 4813-4818
    Abstract: A series of ER fluids materials with high shear stress have been developed recently, which named as polar molecule dominated electrorheological (PM-ER) fluids. Difficulties have been met in shear stress measurement process due to the slide of PM-ER fluids on the surface of metallic electrodes. In this paper, two shearing configurations have been developed to remove the interface effect. The intrinsic shear stress of ER fluids can be obtained by using the devices.
    Type of Medium: Online Resource
    ISSN: 0217-9792 , 1793-6578
    URL: Article
    DOI: 10.1142/S0217979207045700
    RVK:
    UA 4381.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2007
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  • 2
    Online Resource
    Online Resource
    MULTIPLE SCATTERING APPROACHES ON THE ELECTRORHEOLOGICAL FLUIDS
    World Scientific Pub Co Pte Ltd ; 2012
    In:  Modern Physics Letters B Vol. 26, No. 02 ( 2012-01-20), p. 1150007-
    Details
    In: Modern Physics Letters B, World Scientific Pub Co Pte Ltd, Vol. 26, No. 02 ( 2012-01-20), p. 1150007-
    Abstract: The multiple scattering method is used in calculating the electric field distribution for the systems composed of spheres. According to the calculation result, we propose a new mechanism of the electrorheological effect and show that the yield stress induced by this mechanism exhibits the typical characteristics of that observed in experiments.
    Type of Medium: Online Resource
    ISSN: 0217-9849 , 1793-6640
    URL: Article
    DOI: 10.1142/S0217984911500072
    RVK:
    UA 5534.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2012
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  • 3
    Online Resource
    Online Resource
    THE ELECTRORHEOLOGICAL FLUIDS WITH HIGH SHEAR STRESS
    World Scientific Pub Co Pte Ltd ; 2005
    In:  International Journal of Modern Physics B Vol. 19, No. 07n09 ( 2005-04-10), p. 1065-1070
    Details
    In: International Journal of Modern Physics B, World Scientific Pub Co Pte Ltd, Vol. 19, No. 07n09 ( 2005-04-10), p. 1065-1070
    Abstract: A series of high performance ER fluids newly manufactured in our laboratory are presented. The yield stress of those ER fluids can reach several tens of kPa, 100 kPa and even 200 kPa, respectively. For understanding the high shear stress effect a model is proposed base on the electric field induced molecular bounding effect. The main effective factors in fabricating the high performance ER are discussed.
    Type of Medium: Online Resource
    ISSN: 0217-9792 , 1793-6578
    URL: Article
    DOI: 10.1142/S0217979205029869
    RVK:
    UA 4381.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2005
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  • 4
    Online Resource
    Online Resource
    THE EXAFS STUDY OF SUBSTITUTIONAL FE IN Y–Ba–Cu–O SYSTEM
    World Scientific Pub Co Pte Ltd ; 1990
    In:  Modern Physics Letters B Vol. 04, No. 08 ( 1990-04-20), p. 535-543
    Details
    In: Modern Physics Letters B, World Scientific Pub Co Pte Ltd, Vol. 04, No. 08 ( 1990-04-20), p. 535-543
    Abstract: Near neighboring structures around Fe in YBa 2 ( Cu 1−x Fe x ) 3 O 7−y with nominal values of x = 0.07 and 0.10, were determined using extended X-ray absorption fine structure measurements. The results show that substitutional Fe cations are located at Cu(1) site, and essential structures around Fe are similar to those around Cu(1) in YBa 2 Cu 3 O 7−y , but bond lengths of Fe–O(4) and Fe–O(1) are shrunk as compared with those of Cu(1)–O(4) and Cu(1)–O(1) in YBa 2 Cu 3 O 7−y due to the substitution of Cu by Fe. The interesting result is that extra oxygen anions are introduced located at O(5) sites near the substitutional Fe cation and the number of these oxygen anions apparently increases with the content of Fe in the compounds. It can be estimated that substitutional Fe in Y–Ba–Cu–O system has more than one coordination geometries, but has distorted octahedral coordination in a statistical sense. In combination with the superconductivity in these compounds, it is suggested that Cu–O structure on the basal plane of unit cell in YBa 2 Cu 3 O 7−y plays an important role in high-T c superconductivity.
    Type of Medium: Online Resource
    ISSN: 0217-9849 , 1793-6640
    URL: Article
    DOI: 10.1142/S0217984990000684
    RVK:
    UA 5534.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 1990
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  • 5
    Online Resource
    Online Resource
    SCALING PROPERTY OF THE DILUTE-DENSE TRANSITION IN 2D GRANULAR FLOWS
    World Scientific Pub Co Pte Ltd ; 2004
    In:  International Journal of Modern Physics B Vol. 18, No. 17n19 ( 2004-07-30), p. 2441-2447
    Details
    In: International Journal of Modern Physics B, World Scientific Pub Co Pte Ltd, Vol. 18, No. 17n19 ( 2004-07-30), p. 2441-2447
    Abstract: In this paper we report our experimental study of dilute-dense transition in a 2-dimensional granular flow of particle size d 0 and channel width D with confined exit of width d. It is found that a maximum inflow rate Q c exists, above which the outflow changes from dilute to dense and the outflow rate Q(t) drops abruptly from Q c to a dense flow rate Q d . The re-scaled critical rate q c (≡Q c /(D/d0)) is found to be a function of a scaling variable λ only, i.e. q c ~F(λ), and [Formula: see text]. The form of this new variable λ suggests that the dilute-to-dense transition is a global property of the flow; unlike the jamming transition, which depends only on [Formula: see text] . It is also found that this transition occurs when the area fraction of particles near the exit reaches a critical value 0.65±0.03.
    Type of Medium: Online Resource
    ISSN: 0217-9792 , 1793-6578
    URL: Article
    DOI: 10.1142/S0217979204025488
    RVK:
    UA 4381.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2004
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  • 6
    Online Resource
    Online Resource
    THE FREQUENCY DEPENDENCE AND NON-LINEAR DIELECTRIC PROPERTY OF ER FLUID
    World Scientific Pub Co Pte Ltd ; 1996
    In:  International Journal of Modern Physics B Vol. 10, No. 23n24 ( 1996-10-30), p. 3073-3080
    Details
    In: International Journal of Modern Physics B, World Scientific Pub Co Pte Ltd, Vol. 10, No. 23n24 ( 1996-10-30), p. 3073-3080
    Abstract: The frequency dependence of the shear stress in ac field and the non-linear dielectric property of ER fluid have been studied. We find that the shear stresses of some water-free ER fluids increase monotonously with the frequency and tend to reach saturated values at high frequency. The measurements on KNbO 3 /silicone ER fluid show that the shear stresses under 10 3 Hz frequency a.c. field are several times or even an order larger than that under d.c. field for the same field strength. The studies of non-linear dielectric properties of ER fluids show that the permittivity of ER fluid increases linearly with increasing field strength when the electric field exceeds a threshold value E 1 and tends to a saturated constant beyond a high field strength E 2 . Correspondingly the current density follows linear behavior no longer in the region between E 1 and E 2 . A model based on the rearrangement of the particles under the electric field. which causes the variation of the dielectric property of the ER fluid, is proposed and the analysis is consistent with the measured results.
    Type of Medium: Online Resource
    ISSN: 0217-9792 , 1793-6578
    URL: Article
    DOI: 10.1142/S0217979296001525
    RVK:
    UA 4381.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 1996
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  • 7
    Online Resource
    Online Resource
    POLAR-MOLECULE-DOMINATED ELECTRORHEOLOGICAL (PM-ER) FLUIDS: THE PROPERTIES AND EVALUATIONS
    World Scientific Pub Co Pte Ltd ; 2011
    In:  International Journal of Modern Physics B Vol. 25, No. 07 ( 2011-03-20), p. 957-962
    Details
    In: International Journal of Modern Physics B, World Scientific Pub Co Pte Ltd, Vol. 25, No. 07 ( 2011-03-20), p. 957-962
    Abstract: In recent years, a new type ER fluids named as polar-molecule-dominated electrorheological (PM-ER) fluids have been developed, of which the yield stress can reach more than 100 kPa and behaves a linear dependence on the electric field. A brief description on the composition and synthesizing method for the materials is given. The main merits of PM-ER fluid are as follows: high yield stress, the shear stress increasing with shear rate up to more than 10 3 s -1 , low current density, rapid electric response and anti-sedimentation. Some perspectives on PM-ER fluid and its applications are presented.
    Type of Medium: Online Resource
    ISSN: 0217-9792 , 1793-6578
    URL: Article
    DOI: 10.1142/S021797921105850X
    RVK:
    UA 4381.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2011
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  • 8
    Online Resource
    Online Resource
    GRANULAR FLOW IN THE PRESENCE OF AN ELECTRIC FIELD
    World Scientific Pub Co Pte Ltd ; 2002
    In:  International Journal of Modern Physics B Vol. 16, No. 17n18 ( 2002-07-20), p. 2536-2541
    Details
    In: International Journal of Modern Physics B, World Scientific Pub Co Pte Ltd, Vol. 16, No. 17n18 ( 2002-07-20), p. 2536-2541
    Abstract: The granular flow in a vertical pipe in the presence of electric field E is studied. Depending upon its initial state and the applied field voltage the controlled flow rate remains in two phases, dilute flow or dense flow. For dilute flow, the electric field has no effect on the flow rate until V reaches a critical value V 1 . At V = V 1 , the flow rate drops abruptly and a transition of the particulate from dilute to dense flow occurs. For dense flow, the flow rate decreases monotonically with increasing V. A two-dimensional computer simulation has been done and the results agree qualitatively well with the experimental measurements.
    Type of Medium: Online Resource
    ISSN: 0217-9792 , 1793-6578
    URL: Article
    DOI: 10.1142/S0217979202012621
    RVK:
    UA 4381.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2002
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  • 9
    Online Resource
    Online Resource
    TIO 2 BASED ELECTRORHEOLOGICAL FLUID WITH HIGH YIELD STRESS
    World Scientific Pub Co Pte Ltd ; 2005
    In:  International Journal of Modern Physics B Vol. 19, No. 07n09 ( 2005-04-10), p. 1104-1109
    Details
    In: International Journal of Modern Physics B, World Scientific Pub Co Pte Ltd, Vol. 19, No. 07n09 ( 2005-04-10), p. 1104-1109
    Abstract: We have fabricated several TiO 2 based ER fluids with doping and without designed doping, which exhibit the high yield stress up to more than 100kPa. The titanium oxide nanoparticles were synthesized by using wet chemical method. The ER effect of those materials is dominated by the special additives, such as amide or its ramification, as well as the remained molecules or ions in the sample preparation. It is found that the yield stress is also strongly dependent on the viscosity of the oil. The prepared ER fluids possess other attractive characters, for instance the current density is low and against sedimentation.
    Type of Medium: Online Resource
    ISSN: 0217-9792 , 1793-6578
    URL: Article
    DOI: 10.1142/S0217979205029924
    RVK:
    UA 4381.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2005
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    Online Resource
  • 10
    Online Resource
    Online Resource
    POLAR MOLECULE TYPE ELECTRORHEOLOGICAL FLUIDS
    World Scientific Pub Co Pte Ltd ; 2007
    In:  International Journal of Modern Physics B Vol. 21, No. 28n29 ( 2007-11-10), p. 4798-4805
    Details
    In: International Journal of Modern Physics B, World Scientific Pub Co Pte Ltd, Vol. 21, No. 28n29 ( 2007-11-10), p. 4798-4805
    Abstract: The static and dynamic shear stress of newly developed electrorheological (ER) fluids can reach more than 100 kPa and over 60 kPa at 3 kV/mm, respectively. The high yield stress of those ER fluids and its near linear dependence on the electric field are different from the conventional ER fluids and can not be explained with traditional dielectric theory. Experiment demonstrates that the polar molecules adsorbed on the particles play crucial role in those ER fluids, which can be named as polar molecule type electrorheological (PM-ER) fluids. To explain PM-ER effect a model is proposed based on the interaction of polar molecule-charge in between the particles, where the local electric field is much higher than the external one and can cause the polar molecules aligning. The main effective factors for achieving high-performance PM-ER fluids are discussed.
    Type of Medium: Online Resource
    ISSN: 0217-9792 , 1793-6578
    URL: Article
    DOI: 10.1142/S0217979207045682
    RVK:
    UA 4381.B
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2007
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