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Angle of Repose

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Ir. Ilse M. F. Wouters – One of the best experts on this subject based on the ideXlab platform.

  • characterising semi cohesive powders using Angle of Repose
    Particle & Particle Systems Characterization, 1996
    Co-Authors: Ir. Ilse M. F. Wouters, D Geldart

    Abstract:

    When properly measured and interpreted Angle of Repose (AOR) can be a useful method of characterising a powder. Unfortunately, a multitude of definitions and measuring equipment is used. A review of the inherent problems is presented in the first part of this paper.

    The second part of the paper describes the improvements made to a measuring device developed originally for measuring the Angle of Repose of soda ash, so that a wider range of powders can be tested. In the improved design, the tendency of cohesive and semi-cohesive powders to block the device’s funnel has been eliminated.

    A total of 73 powders consisting of four different materials, and covering Groups A, A/C and C of Geldart’s classification, have been tested using the new equipment. The results show that AOR increases systematically with decrease in mean particle size. Combination of AOR measured in the new device with aerated bulk density provides a quick, sensitive and effective method for characterising a wide range of powders.

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  • Characterising Semi‐Cohesive Powders using Angle of Repose
    Particle & Particle Systems Characterization, 1996
    Co-Authors: Ir. Ilse M. F. Wouters, Derek Geldart

    Abstract:

    When properly measured and interpreted Angle of Repose (AOR) can be a useful method of characterising a powder. Unfortunately, a multitude of definitions and measuring equipment is used. A review of the inherent problems is presented in the first part of this paper.

    The second part of the paper describes the improvements made to a measuring device developed originally for measuring the Angle of Repose of soda ash, so that a wider range of powders can be tested. In the improved design, the tendency of cohesive and semi-cohesive powders to block the device’s funnel has been eliminated.

    A total of 73 powders consisting of four different materials, and covering Groups A, A/C and C of Geldart’s classification, have been tested using the new equipment. The results show that AOR increases systematically with decrease in mean particle size. Combination of AOR measured in the new device with aerated bulk density provides a quick, sensitive and effective method for characterising a wide range of powders.

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Derek Geldart – One of the best experts on this subject based on the ideXlab platform.

  • CHARACTERIZATION of POWDER FLOWABILITY USING MEASUREMENT of Angle of Repose
    China Particuology, 2006
    Co-Authors: Derek Geldart, Ezzat Chan Abdullah, Ali Hassanpour, L.c. Nwoke, I. Wouters

    Abstract:

    In response to the need in industry for a quick and reproducible method of measuring the flowability of powders in processes involving transport and storage, the apparently simple idea of measuring Angle of Repose has been revived. The simple tester first used has evolved over a number of years into the present version which is shown to be capable of handling quite small samples of powders that are even slightly cohesive. Experimental data are presented and results shown to compare consistently with the better known Hausner ratio.

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  • Characterising Semi‐Cohesive Powders using Angle of Repose
    Particle & Particle Systems Characterization, 1996
    Co-Authors: Ir. Ilse M. F. Wouters, Derek Geldart

    Abstract:

    When properly measured and interpreted Angle of Repose (AOR) can be a useful method of characterising a powder. Unfortunately, a multitude of definitions and measuring equipment is used. A review of the inherent problems is presented in the first part of this paper.

    The second part of the paper describes the improvements made to a measuring device developed originally for measuring the Angle of Repose of soda ash, so that a wider range of powders can be tested. In the improved design, the tendency of cohesive and semi-cohesive powders to block the device’s funnel has been eliminated.

    A total of 73 powders consisting of four different materials, and covering Groups A, A/C and C of Geldart’s classification, have been tested using the new equipment. The results show that AOR increases systematically with decrease in mean particle size. Combination of AOR measured in the new device with aerated bulk density provides a quick, sensitive and effective method for characterising a wide range of powders.

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D Geldart – One of the best experts on this subject based on the ideXlab platform.

  • characterising semi cohesive powders using Angle of Repose
    Particle & Particle Systems Characterization, 1996
    Co-Authors: Ir. Ilse M. F. Wouters, D Geldart

    Abstract:

    When properly measured and interpreted Angle of Repose (AOR) can be a useful method of characterising a powder. Unfortunately, a multitude of definitions and measuring equipment is used. A review of the inherent problems is presented in the first part of this paper.

    The second part of the paper describes the improvements made to a measuring device developed originally for measuring the Angle of Repose of soda ash, so that a wider range of powders can be tested. In the improved design, the tendency of cohesive and semi-cohesive powders to block the device’s funnel has been eliminated.

    A total of 73 powders consisting of four different materials, and covering Groups A, A/C and C of Geldart’s classification, have been tested using the new equipment. The results show that AOR increases systematically with decrease in mean particle size. Combination of AOR measured in the new device with aerated bulk density provides a quick, sensitive and effective method for characterising a wide range of powders.

    Free Register to Access Article