---
_id: '9990'
abstract:
- lang: eng
  text: The handling of fine powders is an important task in modern production processes.
    However, as fine powders strongly tend to adhesion and agglomeration, their processing
    with conventional methods is difficult or impossible. Especially when processing
    small amounts of highly sensitive fine powders, conventional methods reach their
    technical limits. In process steps such as dosing, transport, and especially mixing
    of fine powders new methods are required. Apart from the well-known method of
    manipulating powder properties by adding chemical additives, this contribution
    aims at improving the handling of dry fine powders by using vibrations at different
    frequencies. Modules are presented, which enable the continuous dosing, the homogeneous
    mixing and the transport of dry fine powders. Finally, these modules are combined
    for the production of a homogeneous mixture of two dry fine powders.
author:
- first_name: Paul
  full_name: Dunst, Paul
  id: '22130'
  last_name: Dunst
- first_name: Peter
  full_name: Bornmann, Peter
  last_name: Bornmann
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
- first_name: Walter.
  full_name: Littmann, Walter.
  last_name: Littmann
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
citation:
  ama: Dunst P, Bornmann P, Hemsel T, Littmann W, Sextro W. Vibration Assisted Dosing,
    Mixing and Transport of Dry Fine Powders. <i>ACTUATOR 2018; 16th International
    Conference on New Actuators</i>. 2018:142-145.
  apa: Dunst, P., Bornmann, P., Hemsel, T., Littmann, W., &#38; Sextro, W. (2018).
    Vibration Assisted Dosing, Mixing and Transport of Dry Fine Powders. <i>ACTUATOR
    2018; 16th International Conference on New Actuators</i>, 142–145.
  bibtex: '@article{Dunst_Bornmann_Hemsel_Littmann_Sextro_2018, title={Vibration Assisted
    Dosing, Mixing and Transport of Dry Fine Powders}, journal={ACTUATOR 2018; 16th
    International Conference on New Actuators}, author={Dunst, Paul and Bornmann,
    Peter and Hemsel, Tobias and Littmann, Walter. and Sextro, Walter}, year={2018},
    pages={142–145} }'
  chicago: Dunst, Paul, Peter Bornmann, Tobias Hemsel, Walter. Littmann, and Walter
    Sextro. “Vibration Assisted Dosing, Mixing and Transport of Dry Fine Powders.”
    <i>ACTUATOR 2018; 16th International Conference on New Actuators</i>, 2018, 142–45.
  ieee: P. Dunst, P. Bornmann, T. Hemsel, W. Littmann, and W. Sextro, “Vibration Assisted
    Dosing, Mixing and Transport of Dry Fine Powders,” <i>ACTUATOR 2018; 16th International
    Conference on New Actuators</i>, pp. 142–145, 2018.
  mla: Dunst, Paul, et al. “Vibration Assisted Dosing, Mixing and Transport of Dry
    Fine Powders.” <i>ACTUATOR 2018; 16th International Conference on New Actuators</i>,
    2018, pp. 142–45.
  short: P. Dunst, P. Bornmann, T. Hemsel, W. Littmann, W. Sextro, ACTUATOR 2018;
    16th International Conference on New Actuators (2018) 142–145.
date_created: 2019-05-27T10:13:10Z
date_updated: 2019-09-16T09:45:13Z
department:
- _id: '151'
language:
- iso: eng
page: 142-145
publication: ACTUATOR 2018; 16th International Conference on New Actuators
quality_controlled: '1'
status: public
title: Vibration Assisted Dosing, Mixing and Transport of Dry Fine Powders
type: journal_article
user_id: '55222'
year: '2018'
...
---
_id: '9991'
abstract:
- lang: eng
  text: Abstract:Since fine powders tend strongly to adhesion and agglomeration, their
    processing withconventional methods is difficult or impossible. Typically, in order
    to enable the handling of finepowders, chemicals are added to increase the flowability
    and reduce adhesion. This contributionshows that instead of additives also vibrations
    can be used to increase the flowability, to reduceadhesion and cohesion, and thus
    to enable or improve processes such as precision dosing, mixing,and transport
    of very fine powders. The methods for manipulating powder properties are describedin
    detail and prototypes for experimental studies are presented. It is shown that
    the handling of finepowders can be improved by using low-frequency, high-frequency
    or a combination of low- andhigh-frequency vibration.
author:
- first_name: Paul
  full_name: Dunst, Paul
  id: '22130'
  last_name: Dunst
- first_name: Peter
  full_name: Bornmann, Peter
  last_name: Bornmann
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
citation:
  ama: Dunst P, Bornmann P, Hemsel T, Sextro W. Vibration-Assisted Handling of Dry
    Fine Powders. <i>Actuators 2018, 7(2)</i>. 2018:1-11. doi:<a href="https://doi.org/10.3390/act7020018">10.3390/act7020018</a>
  apa: Dunst, P., Bornmann, P., Hemsel, T., &#38; Sextro, W. (2018). Vibration-Assisted
    Handling of Dry Fine Powders. <i>Actuators 2018, 7(2).</i>, 1–11. <a href="https://doi.org/10.3390/act7020018">https://doi.org/10.3390/act7020018</a>
  bibtex: '@article{Dunst_Bornmann_Hemsel_Sextro_2018, title={Vibration-Assisted Handling
    of Dry Fine Powders}, DOI={<a href="https://doi.org/10.3390/act7020018">10.3390/act7020018</a>},
    journal={Actuators 2018, 7(2).}, author={Dunst, Paul and Bornmann, Peter and Hemsel,
    Tobias and Sextro, Walter}, year={2018}, pages={1–11} }'
  chicago: Dunst, Paul, Peter Bornmann, Tobias Hemsel, and Walter Sextro. “Vibration-Assisted
    Handling of Dry Fine Powders.” <i>Actuators 2018, 7(2).</i>, 2018, 1–11. <a href="https://doi.org/10.3390/act7020018">https://doi.org/10.3390/act7020018</a>.
  ieee: P. Dunst, P. Bornmann, T. Hemsel, and W. Sextro, “Vibration-Assisted Handling
    of Dry Fine Powders,” <i>Actuators 2018, 7(2).</i>, pp. 1–11, 2018.
  mla: Dunst, Paul, et al. “Vibration-Assisted Handling of Dry Fine Powders.” <i>Actuators
    2018, 7(2).</i>, 2018, pp. 1–11, doi:<a href="https://doi.org/10.3390/act7020018">10.3390/act7020018</a>.
  short: P. Dunst, P. Bornmann, T. Hemsel, W. Sextro, Actuators 2018, 7(2). (2018)
    1–11.
date_created: 2019-05-27T10:16:16Z
date_updated: 2019-09-16T09:44:54Z
department:
- _id: '151'
doi: 10.3390/act7020018
keyword:
- powder handling
- flowability
- dosing
- transport
- mixing
- dispersion
- piezoelectricactuators
- vibrations
language:
- iso: eng
page: 1-11
publication: Actuators 2018, 7(2).
quality_controlled: '1'
status: public
title: Vibration-Assisted Handling of Dry Fine Powders
type: journal_article
user_id: '55222'
year: '2018'
...
---
_id: '9972'
abstract:
- lang: eng
  text: The transportation of dry fine powders is an emerging technologic task, as
    in biotechnology, pharmaceu-tical and coatings industry the particle sizes of
    processed powders get smaller and smaller. Fine powdersare primarily defined by
    the fact that adhesive and cohesive forces outweigh the weight forces, leadingto
    mostly unwanted agglomeration (clumping) and adhesion to surfaces. Thereby it
    gets more difficult touse conventional conveyor systems (e.g. pneumatic or vibratory
    conveyors) for transport. A rather newmethod for transporting these fine powders
    is based on ultrasonic vibrations, which are used to reducefriction between powder
    and substrate. Within this contribution an experimental set-up consisting of apipe,
    a solenoid actuator for axial vibration and an annular piezoelectric actuator
    for the high frequencyradial vibration of the pipe is described. Since amplitudes
    of the radial pipe vibration should be as large aspossible to get high effects
    of friction reduction, the pipe is excited to vibrate in resonance. To determinethe
    optimum excitation frequency and actuator position the vibration modes and resonance
    frequenciesof the pipe are calculated and measured. Results are in good accordance.
author:
- first_name: Paul
  full_name: Dunst, Paul
  id: '22130'
  last_name: Dunst
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
citation:
  ama: Dunst P, Hemsel T, Sextro W. Analysis of pipe vibration in an ultrasonic powder
    transportationsystem. <i>elsevier</i>. 2017;Sensors and Actuators A 263:733-736.
  apa: Dunst, P., Hemsel, T., &#38; Sextro, W. (2017). Analysis of pipe vibration
    in an ultrasonic powder transportationsystem. <i>Elsevier</i>, <i>Sensors and
    Actuators A 263</i>, 733–736.
  bibtex: '@article{Dunst_Hemsel_Sextro_2017, title={Analysis of pipe vibration in
    an ultrasonic powder transportationsystem}, volume={Sensors and Actuators A 263},
    journal={elsevier}, author={Dunst, Paul and Hemsel, Tobias and Sextro, Walter},
    year={2017}, pages={733–736} }'
  chicago: 'Dunst, Paul, Tobias Hemsel, and Walter Sextro. “Analysis of Pipe Vibration
    in an Ultrasonic Powder Transportationsystem.” <i>Elsevier</i> Sensors and Actuators
    A 263 (2017): 733–36.'
  ieee: P. Dunst, T. Hemsel, and W. Sextro, “Analysis of pipe vibration in an ultrasonic
    powder transportationsystem,” <i>elsevier</i>, vol. Sensors and Actuators A 263,
    pp. 733–736, 2017.
  mla: Dunst, Paul, et al. “Analysis of Pipe Vibration in an Ultrasonic Powder Transportationsystem.”
    <i>Elsevier</i>, vol. Sensors and Actuators A 263, 2017, pp. 733–36.
  short: P. Dunst, T. Hemsel, W. Sextro, Elsevier Sensors and Actuators A 263 (2017)
    733–736.
date_created: 2019-05-27T09:31:13Z
date_updated: 2019-09-16T10:23:40Z
department:
- _id: '151'
keyword:
- Powder transport Piezoelectrics Ultrasonics Pipe vibration Finite element simulation
  Fine powder
language:
- iso: eng
page: 733-736
publication: elsevier
quality_controlled: '1'
status: public
title: Analysis of pipe vibration in an ultrasonic powder transportationsystem
type: journal_article
user_id: '55222'
volume: Sensors and Actuators A 263
year: '2017'
...
---
_id: '9958'
abstract:
- lang: eng
  text: The transportation of dry fine powders is an emerging technologic task, as
    in biotechnology, pharmaceutical or coatings industry particle sizes of processed
    powders are getting smaller and smaller. Fine powders are primarily defined by
    the fact that adhesive and cohesive forces outweigh the weight forces. This leads
    to mostly unwanted agglomeration (clumping) and adhesion to surfaces, what makes
    it more difficult to use conventional conveyor systems (e. g. pneumatic or vibratory
    conveyors) for transport. A rather new method for transporting these fine powders
    is based on ultrasonic vibrations, which are used to reduce friction and adhesion
    between powder and the substrate. One very effective set-up consists of a pipe,
    which vibrates harmoniously in axial direction at low frequency combined with
    a pulsed radial high frequency vibration. The high frequency vibration accelerates
    the particles perpendicular to the surface of the pipe, which in average leads
    to lower normal and thereby smaller friction force. With coordinated friction
    manipulation the powder acceleration can be varied so that the powder may be greatly
    accelerated and only slightly decelerated in each excitation period of the low
    frequency axial vibration of the pipe. The amount of powder flow is adjustable
    by vibration amplitudes, frequencies, and pulse rate, which makes the device versatile
    for comparable high volume and fine dosing using one setup. Within this contribution
    an experimental set-up consisting of a pipe, a solenoid actuator for axial vibration
    and a piezoelectric actuator for the radial high frequency vibration is described.
    An analytical model is shown, that simulates the powder velocity. Finally, simulation
    results are validated by experimental data for different driving parameters such
    as amplitude of low frequency vibration, pipe material and inclination angle.
author:
- first_name: Paul
  full_name: Dunst, Paul
  id: '22130'
  last_name: Dunst
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
- first_name: Peter
  full_name: Bornmann, Peter
  last_name: Bornmann
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
- first_name: Walter
  full_name: Littmann, Walter
  last_name: Littmann
citation:
  ama: 'Dunst P, Sextro W, Bornmann P, Hemsel T, Littmann W. Transportation of dry
    fine powders by coordinated friction manipulation. In: <i>PAMM Proc. Appl. Math.
    Mech. 16</i>. Braunschweig; 2016:635-636. doi:<a href="https://doi.org/10.1002/pamm.201610306">10.1002/pamm.201610306</a>'
  apa: Dunst, P., Sextro, W., Bornmann, P., Hemsel, T., &#38; Littmann, W. (2016).
    Transportation of dry fine powders by coordinated friction manipulation. In <i>PAMM
    Proc. Appl. Math. Mech. 16</i> (pp. 635–636). Braunschweig. <a href="https://doi.org/10.1002/pamm.201610306">https://doi.org/10.1002/pamm.201610306</a>
  bibtex: '@inproceedings{Dunst_Sextro_Bornmann_Hemsel_Littmann_2016, place={Braunschweig},
    title={Transportation of dry fine powders by coordinated friction manipulation},
    DOI={<a href="https://doi.org/10.1002/pamm.201610306">10.1002/pamm.201610306</a>},
    booktitle={PAMM Proc. Appl. Math. Mech. 16}, author={Dunst, Paul and Sextro, Walter
    and Bornmann, Peter and Hemsel, Tobias and Littmann, Walter}, year={2016}, pages={635–636}
    }'
  chicago: Dunst, Paul, Walter Sextro, Peter Bornmann, Tobias Hemsel, and Walter Littmann.
    “Transportation of Dry Fine Powders by Coordinated Friction Manipulation.” In
    <i>PAMM Proc. Appl. Math. Mech. 16</i>, 635–36. Braunschweig, 2016. <a href="https://doi.org/10.1002/pamm.201610306">https://doi.org/10.1002/pamm.201610306</a>.
  ieee: P. Dunst, W. Sextro, P. Bornmann, T. Hemsel, and W. Littmann, “Transportation
    of dry fine powders by coordinated friction manipulation,” in <i>PAMM Proc. Appl.
    Math. Mech. 16</i>, 2016, pp. 635–636.
  mla: Dunst, Paul, et al. “Transportation of Dry Fine Powders by Coordinated Friction
    Manipulation.” <i>PAMM Proc. Appl. Math. Mech. 16</i>, 2016, pp. 635–36, doi:<a
    href="https://doi.org/10.1002/pamm.201610306">10.1002/pamm.201610306</a>.
  short: 'P. Dunst, W. Sextro, P. Bornmann, T. Hemsel, W. Littmann, in: PAMM Proc.
    Appl. Math. Mech. 16, Braunschweig, 2016, pp. 635–636.'
date_created: 2019-05-27T08:57:25Z
date_updated: 2019-05-27T08:59:25Z
department:
- _id: '151'
doi: 10.1002/pamm.201610306
language:
- iso: eng
page: 635-636
place: Braunschweig
publication: PAMM Proc. Appl. Math. Mech. 16
status: public
title: Transportation of dry fine powders by coordinated friction manipulation
type: conference
user_id: '55222'
year: '2016'
...
---
_id: '26142'
abstract:
- lang: eng
  text: Modeling of particle deposition on adjacent walls is a key issue in various
    applications like separation or transport processes. The present paper focuses
    on the modeling of turbophoretic deposition of particles in the micron size range.
    The first step is to evaluate the important range where turbophoresis plays an
    important role in comparison to other mechanisms e.g. gravity or electrostatic
    separation. The disadvantages of commonly used models will be analyzed and overcome
    by implementing a more sophisticated approach considering damping of turbulent
    fluctuations in the wall-boundary layer. In contrast to previous work, commonly
    used turbulence models are applied to solve the mean flow field of the examples
    under consideration. The results will show a good prediction of particle deposition
    in comparison to experimental values [B.Y.H. Liu, J.K. Agarwal, Experimental observation
    of aerosol deposition in turbulent flow, Aerosol. Sci. 5 (1974) 145–155.] by using
    the advanced model.
author:
- first_name: M.
  full_name: Horn, M.
  last_name: Horn
- first_name: Hans-Joachim
  full_name: Schmid, Hans-Joachim
  id: '464'
  last_name: Schmid
citation:
  ama: Horn M, Schmid H-J. A comprehensive approach in modeling Lagrangian particle
    deposition in turbulent boundary layers. <i>Powder Technology</i>. 2008;186(3):189-198.
    doi:<a href="https://doi.org/10.1016/j.powtec.2007.11.048">10.1016/j.powtec.2007.11.048</a>
  apa: Horn, M., &#38; Schmid, H.-J. (2008). A comprehensive approach in modeling
    Lagrangian particle deposition in turbulent boundary layers. <i>Powder Technology</i>,
    <i>186</i>(3), 189–198. <a href="https://doi.org/10.1016/j.powtec.2007.11.048">https://doi.org/10.1016/j.powtec.2007.11.048</a>
  bibtex: '@article{Horn_Schmid_2008, title={A comprehensive approach in modeling
    Lagrangian particle deposition in turbulent boundary layers}, volume={186}, DOI={<a
    href="https://doi.org/10.1016/j.powtec.2007.11.048">10.1016/j.powtec.2007.11.048</a>},
    number={3}, journal={Powder Technology}, author={Horn, M. and Schmid, Hans-Joachim},
    year={2008}, pages={189–198} }'
  chicago: 'Horn, M., and Hans-Joachim Schmid. “A Comprehensive Approach in Modeling
    Lagrangian Particle Deposition in Turbulent Boundary Layers.” <i>Powder Technology</i>
    186, no. 3 (2008): 189–98. <a href="https://doi.org/10.1016/j.powtec.2007.11.048">https://doi.org/10.1016/j.powtec.2007.11.048</a>.'
  ieee: 'M. Horn and H.-J. Schmid, “A comprehensive approach in modeling Lagrangian
    particle deposition in turbulent boundary layers,” <i>Powder Technology</i>, vol.
    186, no. 3, pp. 189–198, 2008, doi: <a href="https://doi.org/10.1016/j.powtec.2007.11.048">10.1016/j.powtec.2007.11.048</a>.'
  mla: Horn, M., and Hans-Joachim Schmid. “A Comprehensive Approach in Modeling Lagrangian
    Particle Deposition in Turbulent Boundary Layers.” <i>Powder Technology</i>, vol.
    186, no. 3, 2008, pp. 189–98, doi:<a href="https://doi.org/10.1016/j.powtec.2007.11.048">10.1016/j.powtec.2007.11.048</a>.
  short: M. Horn, H.-J. Schmid, Powder Technology 186 (2008) 189–198.
date_created: 2021-10-13T15:37:04Z
date_updated: 2022-01-06T06:57:16Z
doi: 10.1016/j.powtec.2007.11.048
intvolume: '       186'
issue: '3'
language:
- iso: eng
page: 189-198
publication: Powder Technology
publication_identifier:
  issn:
  - 0032-5910
publication_status: published
status: public
title: A comprehensive approach in modeling Lagrangian particle deposition in turbulent
  boundary layers
type: journal_article
user_id: '70093'
volume: 186
year: '2008'
...
---
_id: '9545'
author:
- first_name: B
  full_name: Mracek, B
  last_name: Mracek
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
- first_name: Maik
  full_name: Mracek, Maik
  last_name: Mracek
citation:
  ama: 'Mracek B, Hemsel T, Mracek M. Powder Transport by Ultrasonic Waves. In: <i>Proceedings
    of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>.
    HNI Verlagsschriftenreihe. Paderborn, Germany; 2006:177-182.'
  apa: Mracek, B., Hemsel, T., &#38; Mracek, M. (2006). Powder Transport by Ultrasonic
    Waves. In <i>Proceedings of 2nd International Workshop on Piezoelectric Materials
    and Applications in Actuators</i> (pp. 177–182). Paderborn, Germany.
  bibtex: '@inproceedings{Mracek_Hemsel_Mracek_2006, place={Paderborn, Germany}, series={HNI
    Verlagsschriftenreihe}, title={Powder Transport by Ultrasonic Waves}, number={Band
    180}, booktitle={Proceedings of 2nd International Workshop on Piezoelectric Materials
    and Applications in Actuators}, author={Mracek, B and Hemsel, Tobias and Mracek,
    Maik}, year={2006}, pages={177–182}, collection={HNI Verlagsschriftenreihe} }'
  chicago: Mracek, B, Tobias Hemsel, and Maik Mracek. “Powder Transport by Ultrasonic
    Waves.” In <i>Proceedings of 2nd International Workshop on Piezoelectric Materials
    and Applications in Actuators</i>, 177–82. HNI Verlagsschriftenreihe. Paderborn,
    Germany, 2006.
  ieee: B. Mracek, T. Hemsel, and M. Mracek, “Powder Transport by Ultrasonic Waves,”
    in <i>Proceedings of 2nd International Workshop on Piezoelectric Materials and
    Applications in Actuators</i>, 2006, no. Band 180, pp. 177–182.
  mla: Mracek, B., et al. “Powder Transport by Ultrasonic Waves.” <i>Proceedings of
    2nd International Workshop on Piezoelectric Materials and Applications in Actuators</i>,
    no. Band 180, 2006, pp. 177–82.
  short: 'B. Mracek, T. Hemsel, M. Mracek, in: Proceedings of 2nd International Workshop
    on Piezoelectric Materials and Applications in Actuators, Paderborn, Germany,
    2006, pp. 177–182.'
date_created: 2019-04-29T09:31:58Z
date_updated: 2022-01-06T07:04:16Z
department:
- _id: '151'
issue: Band 180
language:
- iso: eng
page: 177-182
place: Paderborn, Germany
publication: Proceedings of 2nd International Workshop on Piezoelectric Materials
  and Applications in Actuators
series_title: HNI Verlagsschriftenreihe
status: public
title: Powder Transport by Ultrasonic Waves
type: conference
user_id: '55222'
year: '2006'
...