Particle & Particle Systems Characterization

Cover image for Particle & Particle Systems Characterization

Special Issue: Process Tomography

October, 2006

Volume 23, Issue 3-4

Pages 223–342

  1. Contents

    1. Top of page
    2. Contents
    3. Editorial
    4. Research Articles
    5. Erratum
    6. Calendar
    7. Instructions for Authors
    1. Contents: Part. Part. Syst. Charact. 3-4/2006 (pages 223–226)

      Article first published online: 23 OCT 2006 | DOI: 10.1002/ppsc.200690008

  2. Editorial

    1. Top of page
    2. Contents
    3. Editorial
    4. Research Articles
    5. Erratum
    6. Calendar
    7. Instructions for Authors
    1. Editorial: Part. Part. Syst. Charact. 3-4/2006 (page 227)

      Xiaodong Jia

      Article first published online: 23 OCT 2006 | DOI: 10.1002/ppsc.200690009

  3. Research Articles

    1. Top of page
    2. Contents
    3. Editorial
    4. Research Articles
    5. Erratum
    6. Calendar
    7. Instructions for Authors
    1. Application of X-ray Microtomography and Image Processing to the Investigation of a Compacted Granular System (pages 229–236)

      Xiaowei Fu, James A. Elliott, A. Craig Bentham, Bruno C. Hancock and Ruth E. Cameron

      Article first published online: 23 OCT 2006 | DOI: 10.1002/ppsc.200601054

      A novel technique to visualize and quantitatively analyze powder packing and movement during compaction is described. It is based on modern X-ray microtomography and image processing. Validation with Scanning Electron Microscopy as well as Discrete Element Simulations show excellent agreement.

    2. Watershed Functions Applied to a 3D Image Segmentation Problem for the Analysis of Packed Particle Beds (pages 237–245)

      Alvaro Videla, Chen-Luh Lin and Jan D. Miller

      Article first published online: 23 OCT 2006 | DOI: 10.1002/ppsc.200601055

      A method for image segmentation and identification of individual, irregularly shaped partices in a packed bed has been developed. It is based on X-ray microtomography in combination with several image processing tools and a watershed 3D algorithm. This technique is shown to reconstruct complex 3D shapes of individual particles in different exemplary cases and the results are discussed thoroughly.

    3. Using Two Dimensional Sectional Distributions to Infer Three Dimensional Volumetric Distributions – Validation using Tomography (pages 246–253)

      S. L. Gay and R. D. Morrison

      Article first published online: 23 OCT 2006 | DOI: 10.1002/ppsc.200601056

      Recovering 3D information from 2D sections of complex composite particles requires sophisticated mathematical algorithms which have been developed recently. This paper presents a comparison of X-ray tomography with 3D estimates obtained from sectional analysis using microscopy applied to an ensemble of ore particles.

    4. Mapping of Residual Oil and Water Saturation in Porous Media by Means of Digital X-ray Laminography (pages 254–259)

      Eugene I. Palchikov, Yury A. Schemelinin, Anton G. Skripkin, Dmitry Yu. Mekhontsev and Nikolay A. Kondratiev

      Article first published online: 23 OCT 2006 | DOI: 10.1002/ppsc.200601064

      X-ray laminography is applied to study the the distribution of concentrations for a multiphase fluid inside a porous matrix. Geometric as well as algebraic methods for section recovery are used and their application to different specimen structures is discussed in detail.

    5. A Dual Modality Tomography System for Imaging Gas/Solids Flows (pages 260–265)

      Tom Dyakowski, Geir A. Johansen, Bjorn T. Hjertaker, Dominik Sankowski, Volodymyr Mosorov and Jaroslaw Wlodarczyk

      Article first published online: 23 OCT 2006 | DOI: 10.1002/ppsc.200601057

      The paper presents a novel dual modality reconstruction algorithm based on processing data collected from X-ray and electrical capacitance tomography systems. The tomograms are shown for noise-free data as well as for data captured for a gas/solids flow in a vertical channel.

    6. MRI Measurement of Granular Motion in a Rotating Drum (pages 266–271)

      Toshihiro Kawaguchi, Kenji Tsutsumi and Yutaka Tsuji

      Article first published online: 23 OCT 2006 | DOI: 10.1002/ppsc.200601065

      Magnetic Resonance Imaging technique is employed to measure the granular motion inside a rotating drum. In case of a mixture of differently sized particles segregation phenomenon could be studied. Furthermore the influence of rotational speed and drum inclination angle on radial and axial segregation is studied.

    7. Application of CT-Processing to Neutron Radiography Imaging of a Fluidized-Bed (pages 272–278)

      Hisashi Umekawa, Shuji Furui, Mamoru Ozawa and Nobuyuki Takenaka

      Article first published online: 23 OCT 2006 | DOI: 10.1002/ppsc.200601066

      Neutron Radiography is an interesting way to approach fluidized beds since the sensitivity covers a large range for different materials although the experimental effort is quite high. The feasibility is shown for different types of fluidized beds and the limits of the method are discussed in detail.

    8. Gas-solid Two-phase Mixtures Flowing Upward through a Confined Packed Bed (pages 279–288)

      Yurong He, Thang Ngoc Cong and Yulong Ding

      Article first published online: 23 OCT 2006 | DOI: 10.1002/ppsc.200601058

      Theoretical and experimental investigations on the motion of suspendid particles in a fluid flow through a packed bed are described. Positron Emission Particle Tracking is applied to track particles through the bed. Simulations are performed using a continuous multi-fluid model. The results are compared and the limits of the present model are discussed.

    9. Advanced Statistical Analysis as a Novel Tool to Pneumatic Conveying Monitoring and Control Strategy Development (pages 289–296)

      Andrzej Romanowski, Krzysztof Grudzien, Robert G. Aykroyd and Richard A. Williams

      Article first published online: 23 OCT 2006 | DOI: 10.1002/ppsc.200601059

      This paper covers a novel approach for providing a quantitative description of a pneumatic conveying line in terms of parameter values useful for monitoring and control. Electrical Capacitance Tomography is used in combination with an advanced statistical approach and it is shown how characteristic parameters can be estimated without the need for reconstruction and image post procesing.

    10. Analysis and Interpretation of Hopper Flow Behaviour Using Electrical Capacitance Tomography (pages 297–305)

      Andrzej Romanowski, Krzysztof Grudzien and Richard A. Williams

      Article first published online: 23 OCT 2006 | DOI: 10.1002/ppsc.200601060

      This paper presents a critical analysis of the application of electrical capacitance tomography for investigation of bulk solids flow during hopper discharge. Different types of particulate systems are probed in an adjustable hopper geometry. Different data analysis methods are applied and assessed for application to the given class of problems.

    11. Application of Electrical Capacitance Tomography for Bulk Solids Flow Analysis in Silos (pages 306–312)

      Zbigniew Chaniecki, Tomasz Dyakowski, Maciej Niedostatkiewicz and Dominik Sankowski

      Article first published online: 23 OCT 2006 | DOI: 10.1002/ppsc.200601061

      The flow of non-cohesive and cohesive powders in a lab scale silo is investigated using electrical capacitance tomography. Static tests reveal local material compression zones and dynamic test show the formation of different flow patterns. Particularly, influences of wall roughness, initial bulk density and the silo geometry have been studied and provide useful information for controlling silo discharging.

    12. Electrical Resistance Tomography for Suspended Sediment Measurements in Open Channel Flows Using a Novel Sensor Design (pages 313–320)

      H. Inaki Schlaberg, Jaco H. Baas, Mi Wang, Jim L. Best, Richard A. Williams and Jeff Peakall

      Article first published online: 23 OCT 2006 | DOI: 10.1002/ppsc.200601062

      This paper presents a new sensor arrangement in electrical resistance tomography to measure solids concentrations in rectangular channels. A linear as well as a U-shaped sensor arrangement are tested and the respective quality of reconstruction is investigated using test objects. The new sensor is then applied for measurement of suspended sediment concentration and sediment deposition in a channel flow.

    13. Visualisation of Bubbly Velocity Distribution in a Swirling Flow Using Electrical Resistance Tomography (pages 321–329)

      Mi Wang, Gary Lucas, Yunfeng Dai, Nikolaos Panayotopoulos and Richard A. Williams

      Article first published online: 23 OCT 2006 | DOI: 10.1002/ppsc.200601063

      A dual-plane Electrical Resitance Tomography system is used for measuring local air volume fraction and 3D velocity distribution in gas-liquid flows. A new evaluation technique has been successfully applied to different types of air-liquid flows. Even the dispersed phase volumetric flow rate has been obtained. The experimental results are in good agreement with measurements using local probing techniques.

    14. A Multi-Path Ultrasonic Transit Time Flow Meter Using a Tomography Method for Gas Flow Velocity Profile Measurement (pages 330–338)

      Deddy Kurniadi and Amoranto Trisnobudi

      Article first published online: 23 OCT 2006 | DOI: 10.1002/ppsc.200601067

      A new arrangement of multiple ultrasonic flow meters is proposed to measure velocity profiles in a pipe. The filtered back projection method is employed to reconstruct the requested profile. The new arrangement is tested in standard flows as well in asymmetric flows and showed very good results. Therefore, also the volumetric flow rate can be derived from these measurements.

  4. Erratum

    1. Top of page
    2. Contents
    3. Editorial
    4. Research Articles
    5. Erratum
    6. Calendar
    7. Instructions for Authors
    1. You have free access to this content
      The Use of an Exact Light-Scattering Theory for Spheroidal TiO2 Pigment Particles (page 338)

      Juho-Pertti Jalava

      Article first published online: 23 OCT 2006 | DOI: 10.1002/ppsc.200690010

      This article corrects:

      The Use of an Exact Light-Scattering Theory for Spheroidal TiO2 Pigment Particles

      Vol. 23, Issue 2, 159–164, Article first published online: 9 AUG 2006

  5. Calendar

    1. Top of page
    2. Contents
    3. Editorial
    4. Research Articles
    5. Erratum
    6. Calendar
    7. Instructions for Authors
  6. Instructions for Authors

    1. Top of page
    2. Contents
    3. Editorial
    4. Research Articles
    5. Erratum
    6. Calendar
    7. Instructions for Authors

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