The Experts below are selected from a list of 42 Experts worldwide ranked by ideXlab platform

Lee R White - One of the best experts on this subject based on the ideXlab platform.

  • predicting filtration time and maximizing throughput in a Pressure Filter
    Aiche Journal, 1997
    Co-Authors: Kerry A Landma, Lee R White
    Abstract:

    The modeling of Pressure filtration of flocculated suspensions using compressional rheology and a knowledge of compressional yield stress P y (Φ) and a hydraulic resistance factor r(Φ) (Φ is the local volume fraction of solids) is shown to yield an initial solids loading that maximizes the throughput of the Filter. The optimal initial height h 0 is such that the filtration time to reach a specified average volume fraction as output equals the handling time for the Filter press. The maximum throughput of the press is then examined as a function of the remaining control parameters, the initial solids volume fraction Φ 0 , and the applied piston Pressure ΔP. The dependence of filtration time on Φ 0 /Φ∞ (where Φ∞ is the volume fraction of solids at infinite time under applied Pressure ΔP) enables the construction of a simple numerical model for the Pressure filtration process, which accurately approximates predictions of the full compressional rheology model.

Songyu Liu - One of the best experts on this subject based on the ideXlab platform.

  • probe based on multifunctional piezocone penetration test
    2012
    Co-Authors: Guojun Cai, Songyu Liu
    Abstract:

    The utility model discloses a probe based on multifunctional piezocone penetration test, and relates to a probe based on multifunctional CPTU (piezocone penetration test) for measuring lateral Pressure coefficient of soil. A sounding probe body is connected with a feeler bar (6), a three-component seismic detector (5) is disposed on the upper portion of a lower half section of the probe body, an inclinometer (4) is arranged on the lower portion of the three-component seismic detector (5), a friction drum (3) is positioned below the inclinometer (4), the probe body (1) is connected to the lower side of the friction drum (3), and a pore Pressure Filter ring (2) is positioned at a joint of the friction drum (3) and the probe body (1). The lateral Pressure coefficient is directly obtained according to a measurement value of normalized side-wall frictional resistance (fs/) and a predicted value of over-consolidation ration (OCR), the OCR can be determined by the aid of multifunctional CPTU in-situ test technology, and correlation between normalized net tip resistance and the over-consolidation ration is reliable. Besides, the probe implementing the method has the advantages of normal position, speediness, accuracy, economical efficiency and the like.

  • environment pore Pressure cone penetration test probe capable of testing dielectric constant of soil body
    2011
    Co-Authors: Songyu Liu, Guojun Cai, Haifeng Zou
    Abstract:

    The utility model discloses an environment pore Pressure cone penetration test probe capable of testing a dielectric constant of a soil body on site. The center of the probe is provided with a coaxial cable (1); the coaxial cable (1) is enclosed by an insulator (2); the insulator (2) is arranged in a collapsible cylindrical receiver (3); a gap is retained at the lower part of the collapsible cylindrical receiver (3) for accommodating and testing a soil sample (4); a center antenna (5) is used for directly connecting the bottom of the probe and the coaxial cable; the center antenna (5) is positioned in the center of a side wall friction cylinder (6); a conical probe (8) is connected under the side wall friction cylinder (6); and a pore Pressure Filter ring (7) is positioned in the connecting position of the side wall friction cylinder (6) and the conical probe (8).

Kerry A Landma - One of the best experts on this subject based on the ideXlab platform.

  • predicting filtration time and maximizing throughput in a Pressure Filter
    Aiche Journal, 1997
    Co-Authors: Kerry A Landma, Lee R White
    Abstract:

    The modeling of Pressure filtration of flocculated suspensions using compressional rheology and a knowledge of compressional yield stress P y (Φ) and a hydraulic resistance factor r(Φ) (Φ is the local volume fraction of solids) is shown to yield an initial solids loading that maximizes the throughput of the Filter. The optimal initial height h 0 is such that the filtration time to reach a specified average volume fraction as output equals the handling time for the Filter press. The maximum throughput of the press is then examined as a function of the remaining control parameters, the initial solids volume fraction Φ 0 , and the applied piston Pressure ΔP. The dependence of filtration time on Φ 0 /Φ∞ (where Φ∞ is the volume fraction of solids at infinite time under applied Pressure ΔP) enables the construction of a simple numerical model for the Pressure filtration process, which accurately approximates predictions of the full compressional rheology model.

Cai Guojun - One of the best experts on this subject based on the ideXlab platform.

  • nuclear density pore Pressure static cone penetration test probe for testing density of soil mass
    2012
    Co-Authors: Liu Songyu, Zou Haifeng, Cai Guojun
    Abstract:

    The invention discloses a nuclear density pore Pressure static cone penetration test probe for testing density of soil mass. The upper half segment of the probe is connected with a coaxial cable (1), an analog-to-digital converter (2), a pre-amplifier (3), a photomultiplier (4) and a gamma ray source (7) from top down in sequence; a thin-wall stainless steel window (5) is formed on the probe sidewall corresponding to the photomultiplier (4); a lead shield plate (6) is located below the photomultiplier (4); the probe adopts the coaxial cable (1) to transmit signals and data; on the lower half segment of the probe, a half-segment three-component geophone (8), an inclinometer (9), and a friction drum (10) are arranged from top down in sequence; a pore water Pressure sensor (11) is arranged at the middle part of the friction drum (10); a conical probe (13) is connected below the friction drum (10); and a pore Pressure Filter ring (12) is located at the connection of the friction tube (10) and the conical probe (11). The inventive probe has characteristics of in-situ, direct, rapid, accurate and economic testing, and provides a powerful detection tool for the practice of geotechnical engineering.

Guojun Cai - One of the best experts on this subject based on the ideXlab platform.

  • probe based on multifunctional piezocone penetration test
    2012
    Co-Authors: Guojun Cai, Songyu Liu
    Abstract:

    The utility model discloses a probe based on multifunctional piezocone penetration test, and relates to a probe based on multifunctional CPTU (piezocone penetration test) for measuring lateral Pressure coefficient of soil. A sounding probe body is connected with a feeler bar (6), a three-component seismic detector (5) is disposed on the upper portion of a lower half section of the probe body, an inclinometer (4) is arranged on the lower portion of the three-component seismic detector (5), a friction drum (3) is positioned below the inclinometer (4), the probe body (1) is connected to the lower side of the friction drum (3), and a pore Pressure Filter ring (2) is positioned at a joint of the friction drum (3) and the probe body (1). The lateral Pressure coefficient is directly obtained according to a measurement value of normalized side-wall frictional resistance (fs/) and a predicted value of over-consolidation ration (OCR), the OCR can be determined by the aid of multifunctional CPTU in-situ test technology, and correlation between normalized net tip resistance and the over-consolidation ration is reliable. Besides, the probe implementing the method has the advantages of normal position, speediness, accuracy, economical efficiency and the like.

  • environment pore Pressure cone penetration test probe capable of testing dielectric constant of soil body
    2011
    Co-Authors: Songyu Liu, Guojun Cai, Haifeng Zou
    Abstract:

    The utility model discloses an environment pore Pressure cone penetration test probe capable of testing a dielectric constant of a soil body on site. The center of the probe is provided with a coaxial cable (1); the coaxial cable (1) is enclosed by an insulator (2); the insulator (2) is arranged in a collapsible cylindrical receiver (3); a gap is retained at the lower part of the collapsible cylindrical receiver (3) for accommodating and testing a soil sample (4); a center antenna (5) is used for directly connecting the bottom of the probe and the coaxial cable; the center antenna (5) is positioned in the center of a side wall friction cylinder (6); a conical probe (8) is connected under the side wall friction cylinder (6); and a pore Pressure Filter ring (7) is positioned in the connecting position of the side wall friction cylinder (6) and the conical probe (8).