Lintermann, Andreas Computational Meshing for CFD Simulations Book Chapter In: Ithavong, Kiao; Singh, Narinder; Wong, Eurgene; Tu, Jiyuang (Ed.): Clinical and Biomedical Engineering in the Human Nose - A Computational Fluid Dynamics Approach, Chapter 6, pp. 85-115, Springer Nature Singapore Pte Ltd. 2021, 2020, ISBN: 978-981-15-6715-5. @inbook{Lintermann2020d,
title = {Computational Meshing for CFD Simulations},
author = {Lintermann, Andreas},
editor = {Ithavong, Kiao and Singh, Narinder and Wong, Eurgene and Tu, Jiyuang},
url = {https://link.springer.com/chapter/10.1007%2F978-981-15-6716-2_6},
doi = {10.1007/978-981-15-6716-2_6},
isbn = {978-981-15-6715-5},
year = {2020},
date = {2020-10-17},
booktitle = {Clinical and Biomedical Engineering in the Human Nose - A Computational Fluid Dynamics Approach},
pages = {85-115},
publisher = {Springer Nature Singapore Pte Ltd. 2021},
chapter = {6},
abstract = {In CFD modelling, small cells or elements are created to fill this volume. They constitute a mesh where each cell represents a discrete space that represents the flow locally. Mathematical equations that represent the flow physics are then applied to each cell of the mesh. Generating a high quality mesh is extremely important to obtain reliable solutions and to guarantee numerical stability. This chapter begins with a basic introduction to a typical workflow and guidelines for generating high quality meshes, and concludes with some more advanced topics, i.e., how to generate meshes in parallel, a discussion on mesh quality, and examples on the application of lattice-Boltzmann methods to simulate flow without any turbulence modelling on highly-resolved meshes.},
keywords = {Computational Fluid Dynamics, Mesh Generation, Nasal cavity flows, Nasal respiration, Strömungssimulation},
pubstate = {published},
tppubtype = {inbook}
}
In CFD modelling, small cells or elements are created to fill this volume. They constitute a mesh where each cell represents a discrete space that represents the flow locally. Mathematical equations that represent the flow physics are then applied to each cell of the mesh. Generating a high quality mesh is extremely important to obtain reliable solutions and to guarantee numerical stability. This chapter begins with a basic introduction to a typical workflow and guidelines for generating high quality meshes, and concludes with some more advanced topics, i.e., how to generate meshes in parallel, a discussion on mesh quality, and examples on the application of lattice-Boltzmann methods to simulate flow without any turbulence modelling on highly-resolved meshes. | |
Kim, Soo-Yeon; Park, Young-Chel; Lee, Kee-Joon; Lintermann, Andreas; Han, Sang-Sun; Yu, Hyung-Seog; Choi, Yoon Jeong Assessment of changes in the nasal airway after nonsurgical miniscrew-assisted rapid maxillary expansion in young adults Journal Article In: The Angle Orthodontist, pp. 092917–656.1, 2018, ISSN: 0003-3219. @article{Kim2018,
title = {Assessment of changes in the nasal airway after nonsurgical miniscrew-assisted rapid maxillary expansion in young adults},
author = {Kim, Soo-Yeon and Park, Young-Chel and Lee, Kee-Joon and Lintermann, Andreas and Han, Sang-Sun and Yu, Hyung-Seog and Choi, Yoon Jeong},
editor = {The Angle Orthodontist},
url = {https://rhinodiagnost.eu/wp-content/uploads/2018/04/092917-656.1_Kim2018.pdf},
doi = {www.angle.org/doi/10.2319/092917-656.1},
issn = {0003-3219},
year = {2018},
date = {2018-03-23},
journal = {The Angle Orthodontist},
pages = {092917--656.1},
abstract = {Objectives: To evaluate changes in the volume and cross-sectional area of the nasal airway before and 1 year after nonsurgical miniscrew-assisted rapid maxillary expansion (MARME) in young adults.
Materials and Methods: Fourteen patients (mean age, 22.7 years; 10 women, four men) with a transverse discrepancy who underwent cone beam computed tomography before (T0), immediately after (T1), and 1 year after (T2) expansion were retrospectively included in this study. The volume of the nasal cavity and nasopharynx and the cross-sectional area of the anterior, middle, and posterior segments of the nasal airway were measured and compared among the three timepoints using paired t-tests.
Results: The volume of the nasal cavity showed a significant increase at T1 and T2 (P < .05), while that of the nasopharynx increased only at T2 (P < .05). The anterior and middle cross-sectional areas significantly increased at T1 and T2 (P < .05), while the posterior cross-sectional area showed no significant change throughout the observation period (P > .05).
Conclusions: The results demonstrate that the volume and cross-sectional area of the nasal cavity increased after MARME and were maintained at 1 year after expansion. Therefore, MARME may be helpful in expanding the nasal airway.
},
keywords = {Airway, MARME, Nasal cavity flows, Nasal respiration, Respiratory Flow Computation},
pubstate = {published},
tppubtype = {article}
}
Objectives: To evaluate changes in the volume and cross-sectional area of the nasal airway before and 1 year after nonsurgical miniscrew-assisted rapid maxillary expansion (MARME) in young adults.
Materials and Methods: Fourteen patients (mean age, 22.7 years; 10 women, four men) with a transverse discrepancy who underwent cone beam computed tomography before (T0), immediately after (T1), and 1 year after (T2) expansion were retrospectively included in this study. The volume of the nasal cavity and nasopharynx and the cross-sectional area of the anterior, middle, and posterior segments of the nasal airway were measured and compared among the three timepoints using paired t-tests.
Results: The volume of the nasal cavity showed a significant increase at T1 and T2 (P < .05), while that of the nasopharynx increased only at T2 (P < .05). The anterior and middle cross-sectional areas significantly increased at T1 and T2 (P < .05), while the posterior cross-sectional area showed no significant change throughout the observation period (P > .05).
Conclusions: The results demonstrate that the volume and cross-sectional area of the nasal cavity increased after MARME and were maintained at 1 year after expansion. Therefore, MARME may be helpful in expanding the nasal airway.
| |
Göbbert, Jens Henrik Flow predictions for your nose Journal Article In: Exascale-Newsletter, vol. 3, pp. 3, 2017. @article{Göbbert2017exa,
title = {Flow predictions for your nose},
author = {Göbbert, Jens Henrik},
editor = {Forschungszentrum Jülich GmbH},
url = {http://exascale-news.de/en/2017/index/#!/Flow-Predictions-for-Your-Nose, Flow predictions for your nose (Englische Version online)
http://rhinodiagnost.eu/wp-content/uploads/2017/11/exascale_nl_03_2017.pdf, Strömungsvorhersage für die Nase (Deutsche Version)
},
year = {2017},
date = {2017-11-09},
urldate = {2017-11-09},
journal = {Exascale-Newsletter},
volume = {3},
pages = {3},
institution = {Forschungszentrum Jülich GmbH},
keywords = {Computational Fluid Dynamics, High performance computing, Höchstleistungsrechner, Medizin, Nasal respiration, Strömungssimulation},
pubstate = {published},
tppubtype = {article}
}
| |
Lintermann, Andreas; Göbbert, Jens Henrik; Vogt, Klaus; Koch, Walter; Hetzel, Alexander Rhinodiagnost - Morphological and functional precision diagnostics of nasal cavities Journal Article In: InSiDE, Innovatives Supercomputing in Deutschland, vol. 15, no. 2, pp. 106-109, 2017. @article{RhinoAll,
title = {Rhinodiagnost - Morphological and functional precision diagnostics of nasal cavities},
author = {Lintermann, Andreas and Göbbert, Jens Henrik and Vogt, Klaus and Koch, Walter and Hetzel, Alexander},
editor = {Gauss Center for Supercomputing (GCS), High-Perfomance Computing Center Stuttart (HLRS)},
url = {http://rhinodiagnost.eu/wp-content/uploads/2017/11/InSiDE-Innovatives-Supercomputing-in-Deutschland-2017-Rhinodiagnost-Morphological-and-functional-precision-diagnostics-of-nasal-c.pdf, Rhinodiagnost - Morphological and functional precision diagnostics of nasal cavities},
year = {2017},
date = {2017-08-31},
journal = {InSiDE, Innovatives Supercomputing in Deutschland},
volume = {15},
number = {2},
pages = {106-109},
keywords = {Computational Fluid Dynamics, Diagnostics, In-situ computational steering, Nasal respiration, Rhinology, Rhinomanometry},
pubstate = {published},
tppubtype = {article}
}
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