---
_id: '43044'
abstract:
- lang: eng
  text: <jats:p>Abstract. The combination of incremental sheet metal forming and high-speed
    forming offers new possibilities for flexible forming processes in the production
    of large sheet metal components of increased complexity with relatively low forming
    energies. In this paper, the general feasibility and process differences between
    the pulse-driven high-speed forming technologies of electrohydraulic and electromagnetic
    forming were investigated. An example component made of EN AW 6016 aluminum sheet
    metal was thus formed incrementally by both processes and the forming result evaluated
    by an optical 3D measurement system. For this purpose, a forming strategy for
    electromagnetic incremental forming (EMIF) was developed, tested and adapted to
    the electrohydraulic incremental forming process (EHIF). The discharge energy,
    the tool displacement and the pressure field of the forming zone were determined
    as relevant parameters for the definition of an adequate tool path strategy. It
    was found that the EHIF process is less affected by larger distances between the
    tool and the blank, while this is a critical variable for force application to
    the component during EMIF. On the other hand, the more uniform pressure distribution
    of the EMIF process is advantageous for forming large steady component areas.
    </jats:p>
author:
- first_name: Maik
  full_name: Holzmüller, Maik
  id: '82645'
  last_name: Holzmüller
- first_name: Maik
  full_name: Linnemann, Maik
  last_name: Linnemann
- first_name: Werner
  full_name: Homberg, Werner
  id: '233'
  last_name: Homberg
- first_name: Verena
  full_name: Psyk, Verena
  last_name: Psyk
- first_name: 'Verena '
  full_name: 'Kräusel, Verena '
  last_name: Kräusel
- first_name: Janika
  full_name: Kroos, Janika
  last_name: Kroos
citation:
  ama: 'Holzmüller M, Linnemann M, Homberg W, Psyk V, Kräusel V, Kroos J. Proof of
    concept for incremental sheet metal forming by means of electromagnetic and electrohydraulic
    high-speed forming. In: <i>Materials Research Proceedings</i>. Vol 25. Materials
    Research Forum LLC; 2023:11-18. doi:<a href="https://doi.org/10.21741/9781644902417-2">10.21741/9781644902417-2</a>'
  apa: Holzmüller, M., Linnemann, M., Homberg, W., Psyk, V., Kräusel, V., &#38; Kroos,
    J. (2023). Proof of concept for incremental sheet metal forming by means of electromagnetic
    and electrohydraulic high-speed forming. <i>Materials Research Proceedings</i>,
    <i>25</i>, 11–18. <a href="https://doi.org/10.21741/9781644902417-2">https://doi.org/10.21741/9781644902417-2</a>
  bibtex: '@inproceedings{Holzmüller_Linnemann_Homberg_Psyk_Kräusel_Kroos_2023, title={Proof
    of concept for incremental sheet metal forming by means of electromagnetic and
    electrohydraulic high-speed forming}, volume={25}, DOI={<a href="https://doi.org/10.21741/9781644902417-2">10.21741/9781644902417-2</a>},
    booktitle={Materials Research Proceedings}, publisher={Materials Research Forum
    LLC}, author={Holzmüller, Maik and Linnemann, Maik and Homberg, Werner and Psyk,
    Verena and Kräusel, Verena  and Kroos, Janika}, year={2023}, pages={11–18} }'
  chicago: Holzmüller, Maik, Maik Linnemann, Werner Homberg, Verena Psyk, Verena  Kräusel,
    and Janika Kroos. “Proof of Concept for Incremental Sheet Metal Forming by Means
    of Electromagnetic and Electrohydraulic High-Speed Forming.” In <i>Materials Research
    Proceedings</i>, 25:11–18. Materials Research Forum LLC, 2023. <a href="https://doi.org/10.21741/9781644902417-2">https://doi.org/10.21741/9781644902417-2</a>.
  ieee: 'M. Holzmüller, M. Linnemann, W. Homberg, V. Psyk, V. Kräusel, and J. Kroos,
    “Proof of concept for incremental sheet metal forming by means of electromagnetic
    and electrohydraulic high-speed forming,” in <i>Materials Research Proceedings</i>,
    Nürnberg, 2023, vol. 25, pp. 11–18, doi: <a href="https://doi.org/10.21741/9781644902417-2">10.21741/9781644902417-2</a>.'
  mla: Holzmüller, Maik, et al. “Proof of Concept for Incremental Sheet Metal Forming
    by Means of Electromagnetic and Electrohydraulic High-Speed Forming.” <i>Materials
    Research Proceedings</i>, vol. 25, Materials Research Forum LLC, 2023, pp. 11–18,
    doi:<a href="https://doi.org/10.21741/9781644902417-2">10.21741/9781644902417-2</a>.
  short: 'M. Holzmüller, M. Linnemann, W. Homberg, V. Psyk, V. Kräusel, J. Kroos,
    in: Materials Research Proceedings, Materials Research Forum LLC, 2023, pp. 11–18.'
conference:
  end_date: 2023-04-05
  location: Nürnberg
  name: 20th International Conference on Sheet Metal 2023
  start_date: 2023-04-02
date_created: 2023-03-17T10:23:18Z
date_updated: 2023-05-02T11:40:24Z
department:
- _id: '156'
doi: 10.21741/9781644902417-2
intvolume: '        25'
keyword:
- Incremental Sheet Forming
- Aluminium
- High-Speed Forming
language:
- iso: eng
page: 11-18
publication: Materials Research Proceedings
publication_identifier:
  issn:
  - 2474-395X
publication_status: published
publisher: Materials Research Forum LLC
quality_controlled: '1'
status: public
title: Proof of concept for incremental sheet metal forming by means of electromagnetic
  and electrohydraulic high-speed forming
type: conference
user_id: '82645'
volume: 25
year: '2023'
...
---
_id: '43045'
abstract:
- lang: eng
  text: <jats:p>The pressure fields generated by two simultaneous discharges have
    not been investigated on any notable scale for the electrohydraulic impulse forming
    method. In this study, the synchronicity of two discharges is ensured by the sequential
    connection of two wires mounted in two spark gaps in a common volume of liquid.
    The objective is to experimentally confirm the equilibrium of the energies evolved
    in two spark gaps by means of pressure measurements. In addition, multipoint membrane
    pressure gauges demonstrated the feasibility of easily recording detailed pressure
    maps. Based on the membrane deformation mechanism and material strengthening under
    static and impulse conditions, the processing procedure is further developed so
    as to achieve better accuracy in the determination of pressure field parameters.
    The practical equality of the pressure fields on the left and right halves of
    the flat-loaded area confirms the equality of energies evolved in the two spark
    gaps. The direct shock waves create zones with the most intensive loading. These
    results provide a basis for the development of new electrohydraulic technologies
    involving the application of two simultaneous discharges with equal energy and
    pressure parameters.</jats:p>
article_number: '40'
author:
- first_name: Mykhaylo
  full_name: Knyazyev, Mykhaylo
  last_name: Knyazyev
- first_name: Maik
  full_name: Holzmüller, Maik
  id: '82645'
  last_name: Holzmüller
- first_name: Werner
  full_name: Homberg, Werner
  id: '233'
  last_name: Homberg
citation:
  ama: Knyazyev M, Holzmüller M, Homberg W. Investigation of Pressure Fields Generated
    by Two Simultaneous Discharges in Liquid Initiated by Wires. <i>Journal of Manufacturing
    and Materials Processing</i>. 2023;7(1). doi:<a href="https://doi.org/10.3390/jmmp7010040">10.3390/jmmp7010040</a>
  apa: Knyazyev, M., Holzmüller, M., &#38; Homberg, W. (2023). Investigation of Pressure
    Fields Generated by Two Simultaneous Discharges in Liquid Initiated by Wires.
    <i>Journal of Manufacturing and Materials Processing</i>, <i>7</i>(1), Article
    40. <a href="https://doi.org/10.3390/jmmp7010040">https://doi.org/10.3390/jmmp7010040</a>
  bibtex: '@article{Knyazyev_Holzmüller_Homberg_2023, title={Investigation of Pressure
    Fields Generated by Two Simultaneous Discharges in Liquid Initiated by Wires},
    volume={7}, DOI={<a href="https://doi.org/10.3390/jmmp7010040">10.3390/jmmp7010040</a>},
    number={140}, journal={Journal of Manufacturing and Materials Processing}, publisher={MDPI
    AG}, author={Knyazyev, Mykhaylo and Holzmüller, Maik and Homberg, Werner}, year={2023}
    }'
  chicago: Knyazyev, Mykhaylo, Maik Holzmüller, and Werner Homberg. “Investigation
    of Pressure Fields Generated by Two Simultaneous Discharges in Liquid Initiated
    by Wires.” <i>Journal of Manufacturing and Materials Processing</i> 7, no. 1 (2023).
    <a href="https://doi.org/10.3390/jmmp7010040">https://doi.org/10.3390/jmmp7010040</a>.
  ieee: 'M. Knyazyev, M. Holzmüller, and W. Homberg, “Investigation of Pressure Fields
    Generated by Two Simultaneous Discharges in Liquid Initiated by Wires,” <i>Journal
    of Manufacturing and Materials Processing</i>, vol. 7, no. 1, Art. no. 40, 2023,
    doi: <a href="https://doi.org/10.3390/jmmp7010040">10.3390/jmmp7010040</a>.'
  mla: Knyazyev, Mykhaylo, et al. “Investigation of Pressure Fields Generated by Two
    Simultaneous Discharges in Liquid Initiated by Wires.” <i>Journal of Manufacturing
    and Materials Processing</i>, vol. 7, no. 1, 40, MDPI AG, 2023, doi:<a href="https://doi.org/10.3390/jmmp7010040">10.3390/jmmp7010040</a>.
  short: M. Knyazyev, M. Holzmüller, W. Homberg, Journal of Manufacturing and Materials
    Processing 7 (2023).
date_created: 2023-03-17T10:31:23Z
date_updated: 2023-05-02T11:40:35Z
department:
- _id: '156'
doi: 10.3390/jmmp7010040
intvolume: '         7'
issue: '1'
keyword:
- impulse
- forming
- electrohydraulic
- discharge
- wire
- pressure gauge
- pressure field
language:
- iso: eng
publication: Journal of Manufacturing and Materials Processing
publication_identifier:
  issn:
  - 2504-4494
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: Investigation of Pressure Fields Generated by Two Simultaneous Discharges in
  Liquid Initiated by Wires
type: journal_article
user_id: '82645'
volume: 7
year: '2023'
...
---
_id: '28941'
author:
- first_name: Reza
  full_name: Afsahnoudeh, Reza
  id: '90390'
  last_name: Afsahnoudeh
- first_name: Maik
  full_name: Holzmüller, Maik
  id: '82645'
  last_name: Holzmüller
- first_name: Fabian
  full_name: Bader, Fabian
  id: '65204'
  last_name: Bader
- first_name: Werner
  full_name: Homberg, Werner
  id: '233'
  last_name: Homberg
- first_name: Eugeny Y.
  full_name: Kenig, Eugeny Y.
  id: '665'
  last_name: Kenig
citation:
  ama: 'Afsahnoudeh R, Holzmüller M, Bader F, Homberg W, Kenig EY. Numerische Untersuchung
    von Oberflächenstrukturierung zur Erhöhung der Effizienz von Kissenplatten-Wärmeübertragern.
    In: ; 2023.'
  apa: Afsahnoudeh, R., Holzmüller, M., Bader, F., Homberg, W., &#38; Kenig, E. Y.
    (2023). <i>Numerische Untersuchung von Oberflächenstrukturierung zur Erhöhung
    der Effizienz von Kissenplatten-Wärmeübertragern</i>. Jahrestreffen der DECHEMA-Fachgruppen
    Computational Fluid Dynamics und Wärme- und Stoffübertragung, Frankfurt am Main.
  bibtex: '@inproceedings{Afsahnoudeh_Holzmüller_Bader_Homberg_Kenig_2023, title={Numerische
    Untersuchung von Oberflächenstrukturierung zur Erhöhung der Effizienz von Kissenplatten-Wärmeübertragern},
    author={Afsahnoudeh, Reza and Holzmüller, Maik and Bader, Fabian and Homberg,
    Werner and Kenig, Eugeny Y.}, year={2023} }'
  chicago: Afsahnoudeh, Reza, Maik Holzmüller, Fabian Bader, Werner Homberg, and Eugeny
    Y. Kenig. “Numerische Untersuchung von Oberflächenstrukturierung Zur Erhöhung
    Der Effizienz von Kissenplatten-Wärmeübertragern,” 2023.
  ieee: R. Afsahnoudeh, M. Holzmüller, F. Bader, W. Homberg, and E. Y. Kenig, “Numerische
    Untersuchung von Oberflächenstrukturierung zur Erhöhung der Effizienz von Kissenplatten-Wärmeübertragern,”
    presented at the Jahrestreffen der DECHEMA-Fachgruppen Computational Fluid Dynamics
    und Wärme- und Stoffübertragung, Frankfurt am Main, 2023.
  mla: Afsahnoudeh, Reza, et al. <i>Numerische Untersuchung von Oberflächenstrukturierung
    Zur Erhöhung Der Effizienz von Kissenplatten-Wärmeübertragern</i>. 2023.
  short: 'R. Afsahnoudeh, M. Holzmüller, F. Bader, W. Homberg, E.Y. Kenig, in: 2023.'
conference:
  end_date: 08.06.2023
  location: Frankfurt am Main
  name: Jahrestreffen der DECHEMA-Fachgruppen Computational Fluid Dynamics und Wärme-
    und Stoffübertragung
  start_date: 06.03.2023
date_created: 2021-12-15T11:08:25Z
date_updated: 2023-09-12T08:04:52Z
department:
- _id: '145'
language:
- iso: eng
project:
- _id: '52'
  name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
status: public
title: Numerische Untersuchung von Oberflächenstrukturierung zur Erhöhung der Effizienz
  von Kissenplatten-Wärmeübertragern
type: conference_abstract
user_id: '90390'
year: '2023'
...
---
_id: '56626'
author:
- first_name: Maik
  full_name: Holzmüller, Maik
  id: '82645'
  last_name: Holzmüller
- first_name: Yi
  full_name: Gong, Yi
  id: '98514'
  last_name: Gong
- first_name: Fabian
  full_name: Bader, Fabian
  id: '65204'
  last_name: Bader
- first_name: Armin
  full_name: Henke, Armin
  last_name: Henke
- first_name: Werner
  full_name: Homberg, Werner
  id: '233'
  last_name: Homberg
citation:
  ama: 'Holzmüller M, Gong Y, Bader F, Henke A, Homberg W. Numerical Approach to Model
    a Novel Electrohydraulic Incremental Forming Process for the Manufacture of Pillow
    Plate Heat Exchangers. In: <i>Lecture Notes in Mechanical Engineering</i>. Springer
    Nature Switzerland; 2023. doi:<a href="https://doi.org/10.1007/978-3-031-41023-9_69">10.1007/978-3-031-41023-9_69</a>'
  apa: Holzmüller, M., Gong, Y., Bader, F., Henke, A., &#38; Homberg, W. (2023). Numerical
    Approach to Model a Novel Electrohydraulic Incremental Forming Process for the
    Manufacture of Pillow Plate Heat Exchangers. <i>Lecture Notes in Mechanical Engineering</i>.
    <a href="https://doi.org/10.1007/978-3-031-41023-9_69">https://doi.org/10.1007/978-3-031-41023-9_69</a>
  bibtex: '@inproceedings{Holzmüller_Gong_Bader_Henke_Homberg_2023, place={Cham},
    title={Numerical Approach to Model a Novel Electrohydraulic Incremental Forming
    Process for the Manufacture of Pillow Plate Heat Exchangers}, DOI={<a href="https://doi.org/10.1007/978-3-031-41023-9_69">10.1007/978-3-031-41023-9_69</a>},
    booktitle={Lecture Notes in Mechanical Engineering}, publisher={Springer Nature
    Switzerland}, author={Holzmüller, Maik and Gong, Yi and Bader, Fabian and Henke,
    Armin and Homberg, Werner}, year={2023} }'
  chicago: 'Holzmüller, Maik, Yi Gong, Fabian Bader, Armin Henke, and Werner Homberg.
    “Numerical Approach to Model a Novel Electrohydraulic Incremental Forming Process
    for the Manufacture of Pillow Plate Heat Exchangers.” In <i>Lecture Notes in Mechanical
    Engineering</i>. Cham: Springer Nature Switzerland, 2023. <a href="https://doi.org/10.1007/978-3-031-41023-9_69">https://doi.org/10.1007/978-3-031-41023-9_69</a>.'
  ieee: 'M. Holzmüller, Y. Gong, F. Bader, A. Henke, and W. Homberg, “Numerical Approach
    to Model a Novel Electrohydraulic Incremental Forming Process for the Manufacture
    of Pillow Plate Heat Exchangers,” 2023, doi: <a href="https://doi.org/10.1007/978-3-031-41023-9_69">10.1007/978-3-031-41023-9_69</a>.'
  mla: Holzmüller, Maik, et al. “Numerical Approach to Model a Novel Electrohydraulic
    Incremental Forming Process for the Manufacture of Pillow Plate Heat Exchangers.”
    <i>Lecture Notes in Mechanical Engineering</i>, Springer Nature Switzerland, 2023,
    doi:<a href="https://doi.org/10.1007/978-3-031-41023-9_69">10.1007/978-3-031-41023-9_69</a>.
  short: 'M. Holzmüller, Y. Gong, F. Bader, A. Henke, W. Homberg, in: Lecture Notes
    in Mechanical Engineering, Springer Nature Switzerland, Cham, 2023.'
date_created: 2024-10-15T12:00:48Z
date_updated: 2024-10-15T12:09:06Z
department:
- _id: '9'
- _id: '156'
- _id: '321'
doi: 10.1007/978-3-031-41023-9_69
language:
- iso: eng
place: Cham
publication: Lecture Notes in Mechanical Engineering
publication_identifier:
  isbn:
  - '9783031410222'
  - '9783031410239'
  issn:
  - 2195-4356
  - 2195-4364
publication_status: published
publisher: Springer Nature Switzerland
status: public
title: Numerical Approach to Model a Novel Electrohydraulic Incremental Forming Process
  for the Manufacture of Pillow Plate Heat Exchangers
type: conference
user_id: '98514'
year: '2023'
...
---
_id: '56627'
abstract:
- lang: eng
  text: <jats:p>Pillow-plate heat exchangers (PPHEs) represent a suitable alternative
    to conventional shell-and-tube and plate heat exchangers. The inherent waviness
    of their channels promotes fluid mixing in the boundary layers and facilitates
    heat transfer. The overall thermo-hydraulic performance of PPHEs can further be
    enhanced by applying secondary surface structuring, thus increasing their competitiveness
    against conventional heat exchangers. In this work, various secondary structures
    applied on the PPHE surface were studied numerically to explore their potential
    to enhance near-wall mixing. Computational fluid dynamics (CFD) simulations of
    single-phase turbulent flow in the outer PPHE channel were performed and pressure
    drop, heat transfer coefficients, and overall thermo-hydraulic efficiency were
    determined. The simulation results clearly demonstrate a positive impact of secondary
    structuring on heat transfer in PPHEs.</jats:p>
article_number: '7284'
author:
- first_name: Reza
  full_name: Afsahnoudeh, Reza
  id: '90390'
  last_name: Afsahnoudeh
  orcid: https://orcid.org/0009-0001-3161-8036
- first_name: Andreas
  full_name: Wortmeier, Andreas
  id: '49825'
  last_name: Wortmeier
- first_name: Maik
  full_name: Holzmüller, Maik
  id: '82645'
  last_name: Holzmüller
- first_name: Yi
  full_name: Gong, Yi
  id: '98514'
  last_name: Gong
- first_name: Werner
  full_name: Homberg, Werner
  id: '233'
  last_name: Homberg
- first_name: Eugeny
  full_name: Kenig, Eugeny
  id: '665'
  last_name: Kenig
citation:
  ama: 'Afsahnoudeh R, Wortmeier A, Holzmüller M, Gong Y, Homberg W, Kenig E. Thermo-Hydraulic
    Performance of Pillow-Plate Heat Exchangers with Secondary Structuring: A Numerical
    Analysis. <i>Energies</i>. 2023;16(21). doi:<a href="https://doi.org/10.3390/en16217284">10.3390/en16217284</a>'
  apa: 'Afsahnoudeh, R., Wortmeier, A., Holzmüller, M., Gong, Y., Homberg, W., &#38;
    Kenig, E. (2023). Thermo-Hydraulic Performance of Pillow-Plate Heat Exchangers
    with Secondary Structuring: A Numerical Analysis. <i>Energies</i>, <i>16</i>(21),
    Article 7284. <a href="https://doi.org/10.3390/en16217284">https://doi.org/10.3390/en16217284</a>'
  bibtex: '@article{Afsahnoudeh_Wortmeier_Holzmüller_Gong_Homberg_Kenig_2023, title={Thermo-Hydraulic
    Performance of Pillow-Plate Heat Exchangers with Secondary Structuring: A Numerical
    Analysis}, volume={16}, DOI={<a href="https://doi.org/10.3390/en16217284">10.3390/en16217284</a>},
    number={217284}, journal={Energies}, publisher={MDPI AG}, author={Afsahnoudeh,
    Reza and Wortmeier, Andreas and Holzmüller, Maik and Gong, Yi and Homberg, Werner
    and Kenig, Eugeny}, year={2023} }'
  chicago: 'Afsahnoudeh, Reza, Andreas Wortmeier, Maik Holzmüller, Yi Gong, Werner
    Homberg, and Eugeny Kenig. “Thermo-Hydraulic Performance of Pillow-Plate Heat
    Exchangers with Secondary Structuring: A Numerical Analysis.” <i>Energies</i>
    16, no. 21 (2023). <a href="https://doi.org/10.3390/en16217284">https://doi.org/10.3390/en16217284</a>.'
  ieee: 'R. Afsahnoudeh, A. Wortmeier, M. Holzmüller, Y. Gong, W. Homberg, and E.
    Kenig, “Thermo-Hydraulic Performance of Pillow-Plate Heat Exchangers with Secondary
    Structuring: A Numerical Analysis,” <i>Energies</i>, vol. 16, no. 21, Art. no.
    7284, 2023, doi: <a href="https://doi.org/10.3390/en16217284">10.3390/en16217284</a>.'
  mla: 'Afsahnoudeh, Reza, et al. “Thermo-Hydraulic Performance of Pillow-Plate Heat
    Exchangers with Secondary Structuring: A Numerical Analysis.” <i>Energies</i>,
    vol. 16, no. 21, 7284, MDPI AG, 2023, doi:<a href="https://doi.org/10.3390/en16217284">10.3390/en16217284</a>.'
  short: R. Afsahnoudeh, A. Wortmeier, M. Holzmüller, Y. Gong, W. Homberg, E. Kenig,
    Energies 16 (2023).
date_created: 2024-10-15T12:10:31Z
date_updated: 2025-01-02T11:55:59Z
department:
- _id: '831'
- _id: '9'
doi: 10.3390/en16217284
intvolume: '        16'
issue: '21'
language:
- iso: eng
publication: Energies
publication_identifier:
  issn:
  - 1996-1073
publication_status: published
publisher: MDPI AG
status: public
title: 'Thermo-Hydraulic Performance of Pillow-Plate Heat Exchangers with Secondary
  Structuring: A Numerical Analysis'
type: journal_article
user_id: '90390'
volume: 16
year: '2023'
...