[{"_id":"9990","language":[{"iso":"eng"}],"page":"142-145","user_id":"55222","author":[{"first_name":"Paul","last_name":"Dunst","full_name":"Dunst, Paul","id":"22130"},{"full_name":"Bornmann, Peter","last_name":"Bornmann","first_name":"Peter"},{"first_name":"Tobias","last_name":"Hemsel","full_name":"Hemsel, Tobias","id":"210"},{"full_name":"Littmann, Walter.","last_name":"Littmann","first_name":"Walter."},{"last_name":"Sextro","first_name":"Walter","full_name":"Sextro, Walter","id":"21220"}],"title":"Vibration Assisted Dosing, Mixing and Transport of Dry Fine Powders","year":"2018","status":"public","date_updated":"2019-09-16T09:45:13Z","date_created":"2019-05-27T10:13:10Z","department":[{"_id":"151"}],"type":"journal_article","citation":{"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} }","short":"P. Dunst, P. Bornmann, T. Hemsel, W. Littmann, W. Sextro, ACTUATOR 2018; 16th International Conference on New Actuators (2018) 142–145.","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.","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.","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."},"publication":"ACTUATOR 2018; 16th International Conference on New Actuators","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."}],"quality_controlled":"1"},{"department":[{"_id":"151"}],"keyword":["powder handling","flowability","dosing","transport","mixing","dispersion","piezoelectricactuators","vibrations"],"type":"journal_article","date_created":"2019-05-27T10:16:16Z","quality_controlled":"1","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."}],"citation":{"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>.","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>","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} }","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>","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.","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>.","short":"P. Dunst, P. Bornmann, T. Hemsel, W. Sextro, Actuators 2018, 7(2). (2018) 1–11."},"publication":"Actuators 2018, 7(2).","doi":"10.3390/act7020018","user_id":"55222","_id":"9991","language":[{"iso":"eng"}],"page":"1-11","date_updated":"2019-09-16T09:44:54Z","author":[{"id":"22130","last_name":"Dunst","first_name":"Paul","full_name":"Dunst, Paul"},{"full_name":"Bornmann, Peter","first_name":"Peter","last_name":"Bornmann"},{"id":"210","full_name":"Hemsel, Tobias","last_name":"Hemsel","first_name":"Tobias"},{"id":"21220","full_name":"Sextro, Walter","first_name":"Walter","last_name":"Sextro"}],"title":"Vibration-Assisted Handling of Dry Fine Powders","status":"public","year":"2018"},{"page":"733-736","_id":"9972","language":[{"iso":"eng"}],"user_id":"55222","volume":"Sensors and Actuators A 263","year":"2017","title":"Analysis of pipe vibration in an ultrasonic powder transportationsystem","status":"public","author":[{"full_name":"Dunst, Paul","last_name":"Dunst","first_name":"Paul","id":"22130"},{"id":"210","full_name":"Hemsel, Tobias","first_name":"Tobias","last_name":"Hemsel"},{"id":"21220","full_name":"Sextro, Walter","first_name":"Walter","last_name":"Sextro"}],"date_updated":"2019-09-16T10:23:40Z","date_created":"2019-05-27T09:31:13Z","type":"journal_article","keyword":["Powder transport Piezoelectrics Ultrasonics Pipe vibration Finite element simulation Fine powder"],"department":[{"_id":"151"}],"publication":"elsevier","citation":{"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.","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.","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.","short":"P. Dunst, T. Hemsel, W. Sextro, Elsevier Sensors and Actuators A 263 (2017) 733–736.","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.","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.","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} }"},"abstract":[{"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.","lang":"eng"}],"quality_controlled":"1"},{"author":[{"full_name":"Dunst, Paul","last_name":"Dunst","first_name":"Paul","id":"22130"},{"id":"21220","first_name":"Walter","last_name":"Sextro","full_name":"Sextro, Walter"},{"full_name":"Bornmann, Peter","last_name":"Bornmann","first_name":"Peter"},{"first_name":"Tobias","last_name":"Hemsel","full_name":"Hemsel, Tobias","id":"210"},{"last_name":"Littmann","first_name":"Walter","full_name":"Littmann, Walter"}],"status":"public","title":"Transportation of dry fine powders by coordinated friction manipulation","year":"2016","date_updated":"2019-05-27T08:59:25Z","language":[{"iso":"eng"}],"_id":"9958","page":"635-636","doi":"10.1002/pamm.201610306","user_id":"55222","citation":{"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>.","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>","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} }","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>","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.","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>.","short":"P. Dunst, W. Sextro, P. Bornmann, T. Hemsel, W. Littmann, in: PAMM Proc. Appl. Math. Mech. 16, Braunschweig, 2016, pp. 635–636."},"publication":"PAMM Proc. Appl. Math. Mech. 16","abstract":[{"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.","lang":"eng"}],"place":"Braunschweig","date_created":"2019-05-27T08:57:25Z","department":[{"_id":"151"}],"type":"conference"},{"type":"journal_article","date_created":"2021-10-13T15:37:04Z","abstract":[{"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.","lang":"eng"}],"issue":"3","publication":"Powder Technology","citation":{"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>.","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>","short":"M. Horn, H.-J. Schmid, Powder Technology 186 (2008) 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>.","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>.","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} }","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>"},"user_id":"70093","doi":"10.1016/j.powtec.2007.11.048","volume":186,"page":"189-198","_id":"26142","language":[{"iso":"eng"}],"publication_status":"published","date_updated":"2022-01-06T06:57:16Z","intvolume":"       186","title":"A comprehensive approach in modeling Lagrangian particle deposition in turbulent boundary layers","year":"2008","status":"public","publication_identifier":{"issn":["0032-5910"]},"author":[{"first_name":"M.","last_name":"Horn","full_name":"Horn, M."},{"id":"464","full_name":"Schmid, Hans-Joachim","last_name":"Schmid","first_name":"Hans-Joachim"}]},{"date_updated":"2022-01-06T07:04:16Z","author":[{"full_name":"Mracek, B","last_name":"Mracek","first_name":"B"},{"id":"210","last_name":"Hemsel","first_name":"Tobias","full_name":"Hemsel, Tobias"},{"full_name":"Mracek, Maik","last_name":"Mracek","first_name":"Maik"}],"year":"2006","status":"public","title":"Powder Transport by Ultrasonic Waves","user_id":"55222","_id":"9545","series_title":"HNI Verlagsschriftenreihe","language":[{"iso":"eng"}],"page":"177-182","citation":{"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.","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.","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.","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.","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.","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.","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} }"},"publication":"Proceedings of 2nd International Workshop on Piezoelectric Materials and Applications in Actuators","issue":"Band 180","department":[{"_id":"151"}],"type":"conference","place":"Paderborn, Germany","date_created":"2019-04-29T09:31:58Z"}]