---
_id: '60494'
abstract:
- lang: eng
  text: Pillow-plate heat exchangers (PPHEs) represent a viable alternative to conventional
    shell-and-tube and plate heat exchangers. The waviness of their channels intensifies
    fluid mixing in the boundary layers and facilitates heat transfer. Applying secondary
    surface structuring can further enhance the overall thermo-hydraulic performance
    of PPHEs, thus increasing their competitiveness against conventional heat exchangers.
    In this work, streamlined secondary structures applied on the PPHE surface were
    studied numerically to explore their potential in enhancing near-wall fluid mixing.
    Computational fluid dynamics (CFD) simulations of single-phase turbulent flow
    in the inner PPHE channel were performed and pressure drop, heat transfer coefficients,
    and overall thermo-hydraulic efficiency were determined. The simulation results
    clearly demonstrate a favourable influence of secondary structuring on the heat
    transfer performance of PPHEs.</jats:p>
author:
- first_name: Reza
  full_name: Afsahnoudeh, Reza
  id: '90390'
  last_name: Afsahnoudeh
  orcid: https://orcid.org/0009-0001-3161-8036
- first_name: Julia
  full_name: Riese, Julia
  id: '101499'
  last_name: Riese
  orcid: 0000-0002-3053-0534
- first_name: Eugeny Y.
  full_name: Kenig, Eugeny Y.
  last_name: Kenig
citation:
  ama: 'Afsahnoudeh R, Riese J, Kenig EY. Thermo-Hydraulic Performance of Pillow-Plate
    Heat Exchangers with Streamlined Secondary Structures: A Numerical Analysis. In:
    <i>Systems and Control Transactions</i>. Vol 4. PSE Press; 2025. doi:<a href="https://doi.org/10.69997/sct.178665">10.69997/sct.178665</a>'
  apa: 'Afsahnoudeh, R., Riese, J., &#38; Kenig, E. Y. (2025). Thermo-Hydraulic Performance
    of Pillow-Plate Heat Exchangers with Streamlined Secondary Structures: A Numerical
    Analysis. <i>Systems and Control Transactions</i>, <i>4</i>. <a href="https://doi.org/10.69997/sct.178665">https://doi.org/10.69997/sct.178665</a>'
  bibtex: '@inproceedings{Afsahnoudeh_Riese_Kenig_2025, title={Thermo-Hydraulic Performance
    of Pillow-Plate Heat Exchangers with Streamlined Secondary Structures: A Numerical
    Analysis}, volume={4}, DOI={<a href="https://doi.org/10.69997/sct.178665">10.69997/sct.178665</a>},
    booktitle={Systems and Control Transactions}, publisher={PSE Press}, author={Afsahnoudeh,
    Reza and Riese, Julia and Kenig, Eugeny Y.}, year={2025} }'
  chicago: 'Afsahnoudeh, Reza, Julia Riese, and Eugeny Y. Kenig. “Thermo-Hydraulic
    Performance of Pillow-Plate Heat Exchangers with Streamlined Secondary Structures:
    A Numerical Analysis.” In <i>Systems and Control Transactions</i>, Vol. 4. PSE
    Press, 2025. <a href="https://doi.org/10.69997/sct.178665">https://doi.org/10.69997/sct.178665</a>.'
  ieee: 'R. Afsahnoudeh, J. Riese, and E. Y. Kenig, “Thermo-Hydraulic Performance
    of Pillow-Plate Heat Exchangers with Streamlined Secondary Structures: A Numerical
    Analysis,” in <i>Systems and Control Transactions</i>, 2025, vol. 4, doi: <a href="https://doi.org/10.69997/sct.178665">10.69997/sct.178665</a>.'
  mla: 'Afsahnoudeh, Reza, et al. “Thermo-Hydraulic Performance of Pillow-Plate Heat
    Exchangers with Streamlined Secondary Structures: A Numerical Analysis.” <i>Systems
    and Control Transactions</i>, vol. 4, PSE Press, 2025, doi:<a href="https://doi.org/10.69997/sct.178665">10.69997/sct.178665</a>.'
  short: 'R. Afsahnoudeh, J. Riese, E.Y. Kenig, in: Systems and Control Transactions,
    PSE Press, 2025.'
date_created: 2025-07-02T07:56:12Z
date_updated: 2025-07-02T07:57:08Z
department:
- _id: '831'
doi: 10.69997/sct.178665
intvolume: '         4'
language:
- iso: eng
project:
- _id: '52'
  name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: Systems and Control Transactions
publication_identifier:
  issn:
  - 2818-4734
publication_status: published
publisher: PSE Press
quality_controlled: '1'
status: public
title: 'Thermo-Hydraulic Performance of Pillow-Plate Heat Exchangers with Streamlined
  Secondary Structures: A Numerical Analysis'
type: conference
user_id: '101499'
volume: 4
year: '2025'
...
---
_id: '56194'
author:
- first_name: Reza
  full_name: Afsahnoudeh, Reza
  id: '90390'
  last_name: Afsahnoudeh
  orcid: https://orcid.org/0009-0001-3161-8036
- first_name: Julia
  full_name: Riese, Julia
  id: '101499'
  last_name: Riese
  orcid: 0000-0002-3053-0534
- first_name: Eugeny Y.
  full_name: Kenig, Eugeny Y.
  id: '665'
  last_name: Kenig
citation:
  ama: 'Afsahnoudeh R, Riese J, Kenig EY. A Numerical Analysis of Thermo-Hydraulic
    Performance of Pillow-Plate Heat Exchangers with Ellipsoidal Secondary Structures.
    In: <i>World Congress on Mechanical, Chemical, and Material Engineering</i>. Avestia
    Publishing; 2024. doi:<a href="https://doi.org/10.11159/htff24.145">10.11159/htff24.145</a>'
  apa: Afsahnoudeh, R., Riese, J., &#38; Kenig, E. Y. (2024). A Numerical Analysis
    of Thermo-Hydraulic Performance of Pillow-Plate Heat Exchangers with Ellipsoidal
    Secondary Structures. <i>World Congress on Mechanical, Chemical, and Material
    Engineering</i>. 10th International Conference on Heat Transfer and Fluid Flow,
    Barcelona. <a href="https://doi.org/10.11159/htff24.145">https://doi.org/10.11159/htff24.145</a>
  bibtex: '@inproceedings{Afsahnoudeh_Riese_Kenig_2024, title={A Numerical Analysis
    of Thermo-Hydraulic Performance of Pillow-Plate Heat Exchangers with Ellipsoidal
    Secondary Structures}, DOI={<a href="https://doi.org/10.11159/htff24.145">10.11159/htff24.145</a>},
    booktitle={World Congress on Mechanical, Chemical, and Material Engineering},
    publisher={Avestia Publishing}, author={Afsahnoudeh, Reza and Riese, Julia and
    Kenig, Eugeny Y.}, year={2024} }'
  chicago: Afsahnoudeh, Reza, Julia Riese, and Eugeny Y. Kenig. “A Numerical Analysis
    of Thermo-Hydraulic Performance of Pillow-Plate Heat Exchangers with Ellipsoidal
    Secondary Structures.” In <i>World Congress on Mechanical, Chemical, and Material
    Engineering</i>. Avestia Publishing, 2024. <a href="https://doi.org/10.11159/htff24.145">https://doi.org/10.11159/htff24.145</a>.
  ieee: 'R. Afsahnoudeh, J. Riese, and E. Y. Kenig, “A Numerical Analysis of Thermo-Hydraulic
    Performance of Pillow-Plate Heat Exchangers with Ellipsoidal Secondary Structures,”
    presented at the 10th International Conference on Heat Transfer and Fluid Flow,
    Barcelona, 2024, doi: <a href="https://doi.org/10.11159/htff24.145">10.11159/htff24.145</a>.'
  mla: Afsahnoudeh, Reza, et al. “A Numerical Analysis of Thermo-Hydraulic Performance
    of Pillow-Plate Heat Exchangers with Ellipsoidal Secondary Structures.” <i>World
    Congress on Mechanical, Chemical, and Material Engineering</i>, Avestia Publishing,
    2024, doi:<a href="https://doi.org/10.11159/htff24.145">10.11159/htff24.145</a>.
  short: 'R. Afsahnoudeh, J. Riese, E.Y. Kenig, in: World Congress on Mechanical,
    Chemical, and Material Engineering, Avestia Publishing, 2024.'
conference:
  end_date: 2024-08-24
  location: Barcelona
  name: 10th International Conference on Heat Transfer and Fluid Flow
  start_date: 2024-08-22
date_created: 2024-09-23T07:28:01Z
date_updated: 2024-09-23T07:31:11Z
department:
- _id: '831'
doi: 10.11159/htff24.145
language:
- iso: eng
project:
- _id: '52'
  name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: World Congress on Mechanical, Chemical, and Material Engineering
publication_identifier:
  issn:
  - 2369-8136
publication_status: published
publisher: Avestia Publishing
quality_controlled: '1'
status: public
title: A Numerical Analysis of Thermo-Hydraulic Performance of Pillow-Plate Heat Exchangers
  with Ellipsoidal Secondary Structures
type: conference
user_id: '90390'
year: '2024'
...
---
_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: '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'
...