---
_id: '6579'
abstract:
- lang: eng
text: An explicit approach using symplectic time integration in conjunction with
traditional finite difference spatial derivatives to solve the wave equation in
moving media is presented. A simple operator split of this second order wave equation
into two coupled first order equations is performed, allowing these split equations
to be solved symplectically. Orders of symplectic time integration ranging from
first to fourth along with orders of spatial derivatives ranging from second to
sixth are explored. The case of cylindrical acoustic spreading in air under a
constant velocity in a 2D square structured domain is considered. The variation
of the computed time-of-flight, frequency, and wave length are studied with varying
grid resolution and the deviations from the analytical solutions are determined.
It was found that symplectic time integration interferes with finite difference
spatial derivatives higher than second order causing unexpected results. This
is actually beneficial for unstructured finite volume tools like OpenFOAM where
second order spatial operators are the state-of-the art. Cylindrical acoustic
spreading is simulated on an unstructured 2D triangle mesh showing that symplectic
time integration is not limited to the spatial discretization paradigm and overcomes
the numerical diffusion arising with the in-built numerical methods which hinder
wave propagation.
article_number: e12573
article_type: original
author:
- first_name: Venkatesh
full_name: Inguva, Venkatesh
id: '75069'
last_name: Inguva
- first_name: Nadine
full_name: Feldmann, Nadine
id: '23082'
last_name: Feldmann
- first_name: Leander
full_name: Claes, Leander
id: '11829'
last_name: Claes
orcid: 0000-0002-4393-268X
- first_name: Taras
full_name: Koturbash, Taras
last_name: Koturbash
- first_name: Thomas
full_name: Hahn-Jose, Thomas
last_name: Hahn-Jose
- first_name: Vladimir
full_name: Koutcherov, Vladimir
last_name: Koutcherov
- first_name: Eugeny
full_name: Kenig, Eugeny
id: '665'
last_name: Kenig
citation:
ama: Inguva V, Feldmann N, Claes L, et al. An explicit symplectic approach to solving
the wave equation in moving media. Engineering Reports. Published online
2022. doi:10.1002/eng2.12573
apa: Inguva, V., Feldmann, N., Claes, L., Koturbash, T., Hahn-Jose, T., Koutcherov,
V., & Kenig, E. (2022). An explicit symplectic approach to solving the wave
equation in moving media. Engineering Reports, Article e12573. https://doi.org/10.1002/eng2.12573
bibtex: '@article{Inguva_Feldmann_Claes_Koturbash_Hahn-Jose_Koutcherov_Kenig_2022,
title={An explicit symplectic approach to solving the wave equation in moving
media}, DOI={10.1002/eng2.12573},
number={e12573}, journal={Engineering Reports}, author={Inguva, Venkatesh and
Feldmann, Nadine and Claes, Leander and Koturbash, Taras and Hahn-Jose, Thomas
and Koutcherov, Vladimir and Kenig, Eugeny}, year={2022} }'
chicago: Inguva, Venkatesh, Nadine Feldmann, Leander Claes, Taras Koturbash, Thomas
Hahn-Jose, Vladimir Koutcherov, and Eugeny Kenig. “An Explicit Symplectic Approach
to Solving the Wave Equation in Moving Media.” Engineering Reports, 2022.
https://doi.org/10.1002/eng2.12573.
ieee: 'V. Inguva et al., “An explicit symplectic approach to solving the
wave equation in moving media,” Engineering Reports, Art. no. e12573, 2022,
doi: 10.1002/eng2.12573.'
mla: Inguva, Venkatesh, et al. “An Explicit Symplectic Approach to Solving the Wave
Equation in Moving Media.” Engineering Reports, e12573, 2022, doi:10.1002/eng2.12573.
short: V. Inguva, N. Feldmann, L. Claes, T. Koturbash, T. Hahn-Jose, V. Koutcherov,
E. Kenig, Engineering Reports (2022).
date_created: 2019-01-09T14:37:29Z
date_updated: 2022-09-19T06:59:57Z
department:
- _id: '145'
- _id: '49'
doi: 10.1002/eng2.12573
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://onlinelibrary.wiley.com/doi/abs/10.1002/eng2.12573
oa: '1'
publication: Engineering Reports
status: public
title: An explicit symplectic approach to solving the wave equation in moving media
type: journal_article
user_id: '11829'
year: '2022'
...
---
_id: '33972'
author:
- first_name: Nils
full_name: Mügge, Nils
id: '72972'
last_name: Mügge
- first_name: Alexander
full_name: Kronberg, Alexander
last_name: Kronberg
- first_name: Maxim
full_name: Glushenkov, Maxim
last_name: Glushenkov
- first_name: Venkatesh
full_name: Inguva, Venkatesh
id: '75069'
last_name: Inguva
- first_name: Eugeny Y.
full_name: Kenig, Eugeny Y.
id: '665'
last_name: Kenig
citation:
ama: 'Mügge N, Kronberg A, Glushenkov M, Inguva V, Kenig EY. A Thermal Model for
Recuperative Heat Engines Operating with Dense Working Fluids. In: 1st Conference
on Energy, Environment and Digital Transition E2DT. ; 2022.'
apa: Mügge, N., Kronberg, A., Glushenkov, M., Inguva, V., & Kenig, E. Y. (2022).
A Thermal Model for Recuperative Heat Engines Operating with Dense Working Fluids.
1st Conference on Energy, Environment and Digital Transition E2DT. 1st
Conference on Energy, Environment and Digital Transition E2DT, Mailand, Italien.
bibtex: '@inproceedings{Mügge_Kronberg_Glushenkov_Inguva_Kenig_2022, title={A Thermal
Model for Recuperative Heat Engines Operating with Dense Working Fluids}, booktitle={1st
Conference on Energy, Environment and Digital Transition E2DT}, author={Mügge,
Nils and Kronberg, Alexander and Glushenkov, Maxim and Inguva, Venkatesh and Kenig,
Eugeny Y.}, year={2022} }'
chicago: Mügge, Nils, Alexander Kronberg, Maxim Glushenkov, Venkatesh Inguva, and
Eugeny Y. Kenig. “A Thermal Model for Recuperative Heat Engines Operating with
Dense Working Fluids.” In 1st Conference on Energy, Environment and Digital
Transition E2DT, 2022.
ieee: N. Mügge, A. Kronberg, M. Glushenkov, V. Inguva, and E. Y. Kenig, “A Thermal
Model for Recuperative Heat Engines Operating with Dense Working Fluids,” presented
at the 1st Conference on Energy, Environment and Digital Transition E2DT, Mailand,
Italien, 2022.
mla: Mügge, Nils, et al. “A Thermal Model for Recuperative Heat Engines Operating
with Dense Working Fluids.” 1st Conference on Energy, Environment and Digital
Transition E2DT, 2022.
short: 'N. Mügge, A. Kronberg, M. Glushenkov, V. Inguva, E.Y. Kenig, in: 1st Conference
on Energy, Environment and Digital Transition E2DT, 2022.'
conference:
end_date: 2022-10-26
location: Mailand, Italien
name: 1st Conference on Energy, Environment and Digital Transition E2DT
start_date: 2022-10-23
date_created: 2022-11-02T10:04:38Z
date_updated: 2022-11-02T10:05:39Z
department:
- _id: '9'
- _id: '145'
language:
- iso: eng
publication: 1st Conference on Energy, Environment and Digital Transition E2DT
status: public
title: A Thermal Model for Recuperative Heat Engines Operating with Dense Working
Fluids
type: conference_abstract
user_id: '72972'
year: '2022'
...
---
_id: '40644'
article_number: '119596'
article_type: original
author:
- first_name: Abbas Jarullah Sangoor
full_name: Al-Lami, Abbas Jarullah Sangoor
id: '81772'
last_name: Al-Lami
- first_name: Eugeny Y.
full_name: Kenig, Eugeny Y.
id: '665'
last_name: Kenig
- first_name: Venkatesh
full_name: Inguva, Venkatesh
id: '75069'
last_name: Inguva
citation:
ama: Al-Lami AJS, Kenig EY, Inguva V. Numerical analysis of conjugate heat transfer
within internally channeled tubes. Applied Thermal Engineering. 2022;223.
doi:10.1016/j.applthermaleng.2022.119596
apa: Al-Lami, A. J. S., Kenig, E. Y., & Inguva, V. (2022). Numerical analysis
of conjugate heat transfer within internally channeled tubes. Applied Thermal
Engineering, 223, Article 119596. https://doi.org/10.1016/j.applthermaleng.2022.119596
bibtex: '@article{Al-Lami_Kenig_Inguva_2022, title={Numerical analysis of conjugate
heat transfer within internally channeled tubes}, volume={223}, DOI={10.1016/j.applthermaleng.2022.119596},
number={119596}, journal={Applied Thermal Engineering}, publisher={Elsevier BV},
author={Al-Lami, Abbas Jarullah Sangoor and Kenig, Eugeny Y. and Inguva, Venkatesh},
year={2022} }'
chicago: Al-Lami, Abbas Jarullah Sangoor, Eugeny Y. Kenig, and Venkatesh Inguva.
“Numerical Analysis of Conjugate Heat Transfer within Internally Channeled Tubes.”
Applied Thermal Engineering 223 (2022). https://doi.org/10.1016/j.applthermaleng.2022.119596.
ieee: 'A. J. S. Al-Lami, E. Y. Kenig, and V. Inguva, “Numerical analysis of conjugate
heat transfer within internally channeled tubes,” Applied Thermal Engineering,
vol. 223, Art. no. 119596, 2022, doi: 10.1016/j.applthermaleng.2022.119596.'
mla: Al-Lami, Abbas Jarullah Sangoor, et al. “Numerical Analysis of Conjugate Heat
Transfer within Internally Channeled Tubes.” Applied Thermal Engineering,
vol. 223, 119596, Elsevier BV, 2022, doi:10.1016/j.applthermaleng.2022.119596.
short: A.J.S. Al-Lami, E.Y. Kenig, V. Inguva, Applied Thermal Engineering 223 (2022).
date_created: 2023-01-30T10:04:47Z
date_updated: 2024-03-09T08:34:35Z
doi: 10.1016/j.applthermaleng.2022.119596
has_accepted_license: '1'
intvolume: ' 223'
keyword:
- Industrial and Manufacturing Engineering
- Energy Engineering and Power Technology
language:
- iso: eng
publication: Applied Thermal Engineering
publication_identifier:
issn:
- 1359-4311
publication_status: published
publisher: Elsevier BV
quality_controlled: '1'
status: public
title: Numerical analysis of conjugate heat transfer within internally channeled tubes
type: journal_article
user_id: '81772'
volume: 223
year: '2022'
...
---
_id: '34228'
author:
- first_name: Nils
full_name: Mügge, Nils
id: '72972'
last_name: Mügge
- first_name: Alexander
full_name: Kronberg, Alexander
last_name: Kronberg
- first_name: Maxim
full_name: Glushenkov, Maxim
last_name: Glushenkov
- first_name: Venkatesh
full_name: Inguva, Venkatesh
id: '75069'
last_name: Inguva
- first_name: Eugeny Y.
full_name: Kenig, Eugeny Y.
id: '665'
last_name: Kenig
citation:
ama: Mügge N, Kronberg A, Glushenkov M, Inguva V, Kenig EY. A Thermal Model for
Recuperative Heat Engines Operating with Dense Working Fluids. Chemical Engineering
Transactions. 2022;96:175-180. doi:10.3303/CET2296030
apa: Mügge, N., Kronberg, A., Glushenkov, M., Inguva, V., & Kenig, E. Y. (2022).
A Thermal Model for Recuperative Heat Engines Operating with Dense Working Fluids.
Chemical Engineering Transactions, 96, 175–180. https://doi.org/10.3303/CET2296030
bibtex: '@article{Mügge_Kronberg_Glushenkov_Inguva_Kenig_2022, title={A Thermal
Model for Recuperative Heat Engines Operating with Dense Working Fluids}, volume={96},
DOI={10.3303/CET2296030}, journal={Chemical
Engineering Transactions}, author={Mügge, Nils and Kronberg, Alexander and Glushenkov,
Maxim and Inguva, Venkatesh and Kenig, Eugeny Y.}, year={2022}, pages={175–180}
}'
chicago: 'Mügge, Nils, Alexander Kronberg, Maxim Glushenkov, Venkatesh Inguva, and
Eugeny Y. Kenig. “A Thermal Model for Recuperative Heat Engines Operating with
Dense Working Fluids.” Chemical Engineering Transactions 96 (2022): 175–80.
https://doi.org/10.3303/CET2296030.'
ieee: 'N. Mügge, A. Kronberg, M. Glushenkov, V. Inguva, and E. Y. Kenig, “A Thermal
Model for Recuperative Heat Engines Operating with Dense Working Fluids,” Chemical
Engineering Transactions, vol. 96, pp. 175–180, 2022, doi: 10.3303/CET2296030.'
mla: Mügge, Nils, et al. “A Thermal Model for Recuperative Heat Engines Operating
with Dense Working Fluids.” Chemical Engineering Transactions, vol. 96,
2022, pp. 175–80, doi:10.3303/CET2296030.
short: N. Mügge, A. Kronberg, M. Glushenkov, V. Inguva, E.Y. Kenig, Chemical Engineering
Transactions 96 (2022) 175–180.
conference:
location: Mailand, Italien
name: 1st Conference on Energy, Environment and Digital Transition E2DT
start_date: 2022-10-23
date_created: 2022-12-06T07:09:58Z
date_updated: 2023-04-27T07:26:59Z
department:
- _id: '9'
- _id: '145'
doi: 10.3303/CET2296030
intvolume: ' 96'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.cetjournal.it/cet/22/96/030.pdf
oa: '1'
page: 175-180
publication: Chemical Engineering Transactions
publication_identifier:
isbn:
- 978-88-95608-95-2
issn:
- 2283-9216
publication_status: published
quality_controlled: '1'
status: public
title: A Thermal Model for Recuperative Heat Engines Operating with Dense Working
Fluids
type: journal_article
user_id: '72972'
volume: 96
year: '2022'
...
---
_id: '27375'
author:
- first_name: Andreas Markus
full_name: Schulz, Andreas Markus
id: '63109'
last_name: Schulz
- first_name: Christian
full_name: Wecker, Christian
id: '29891'
last_name: Wecker
- first_name: Venkatesh
full_name: Inguva, Venkatesh
id: '75069'
last_name: Inguva
- first_name: Alexey S.
full_name: Lopatin, Alexey S.
last_name: Lopatin
- first_name: Eugeny Y.
full_name: Kenig, Eugeny Y.
id: '665'
last_name: Kenig
citation:
ama: Schulz AM, Wecker C, Inguva V, Lopatin AS, Kenig EY. A PLIC-based method for
species mass transfer at free fluid interfaces. Chemical Engineering Science.
2022;250. doi:10.1016/j.ces.2021.117357
apa: Schulz, A. M., Wecker, C., Inguva, V., Lopatin, A. S., & Kenig, E. Y. (2022).
A PLIC-based method for species mass transfer at free fluid interfaces. Chemical
Engineering Science, 250. https://doi.org/10.1016/j.ces.2021.117357
bibtex: '@article{Schulz_Wecker_Inguva_Lopatin_Kenig_2022, title={A PLIC-based method
for species mass transfer at free fluid interfaces}, volume={250}, DOI={10.1016/j.ces.2021.117357},
journal={Chemical Engineering Science}, publisher={Elsevier}, author={Schulz,
Andreas Markus and Wecker, Christian and Inguva, Venkatesh and Lopatin, Alexey
S. and Kenig, Eugeny Y.}, year={2022} }'
chicago: Schulz, Andreas Markus, Christian Wecker, Venkatesh Inguva, Alexey S. Lopatin,
and Eugeny Y. Kenig. “A PLIC-Based Method for Species Mass Transfer at Free Fluid
Interfaces.” Chemical Engineering Science 250 (2022). https://doi.org/10.1016/j.ces.2021.117357.
ieee: 'A. M. Schulz, C. Wecker, V. Inguva, A. S. Lopatin, and E. Y. Kenig, “A PLIC-based
method for species mass transfer at free fluid interfaces,” Chemical Engineering
Science, vol. 250, 2022, doi: 10.1016/j.ces.2021.117357.'
mla: Schulz, Andreas Markus, et al. “A PLIC-Based Method for Species Mass Transfer
at Free Fluid Interfaces.” Chemical Engineering Science, vol. 250, Elsevier,
2022, doi:10.1016/j.ces.2021.117357.
short: A.M. Schulz, C. Wecker, V. Inguva, A.S. Lopatin, E.Y. Kenig, Chemical Engineering
Science 250 (2022).
conference:
end_date: 2021-06-16
location: Muster location
name: Muster Conference
start_date: 2021-06-15
date_created: 2021-11-11T12:56:23Z
date_updated: 2023-04-27T15:40:57Z
department:
- _id: '145'
doi: 10.1016/j.ces.2021.117357
intvolume: ' 250'
language:
- iso: eng
project:
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: Chemical Engineering Science
publisher: Elsevier
quality_controlled: '1'
status: public
title: A PLIC-based method for species mass transfer at free fluid interfaces
type: journal_article
user_id: '90390'
volume: 250
year: '2022'
...
---
_id: '44235'
article_number: '1110066'
author:
- first_name: Venkatesh
full_name: Inguva, Venkatesh
id: '75069'
last_name: Inguva
- first_name: Eugeny Y.
full_name: Kenig, Eugeny Y.
id: '665'
last_name: Kenig
- first_name: J. Blair
full_name: Perot, J. Blair
last_name: Perot
citation:
ama: Inguva V, Kenig EY, Perot JB. A front-tracking method for two-phase flow simulation
with no spurious currents. Journal of Computational Physics. 2022;456.
apa: Inguva, V., Kenig, E. Y., & Perot, J. B. (2022). A front-tracking method
for two-phase flow simulation with no spurious currents. Journal of Computational
Physics, 456, Article 1110066.
bibtex: '@article{Inguva_Kenig_Perot_2022, title={A front-tracking method for two-phase
flow simulation with no spurious currents}, volume={456}, number={1110066}, journal={Journal
of Computational Physics}, publisher={Elsevier}, author={Inguva, Venkatesh and
Kenig, Eugeny Y. and Perot, J. Blair}, year={2022} }'
chicago: Inguva, Venkatesh, Eugeny Y. Kenig, and J. Blair Perot. “A Front-Tracking
Method for Two-Phase Flow Simulation with No Spurious Currents.” Journal of
Computational Physics 456 (2022).
ieee: V. Inguva, E. Y. Kenig, and J. B. Perot, “A front-tracking method for two-phase
flow simulation with no spurious currents,” Journal of Computational Physics,
vol. 456, Art. no. 1110066, 2022.
mla: Inguva, Venkatesh, et al. “A Front-Tracking Method for Two-Phase Flow Simulation
with No Spurious Currents.” Journal of Computational Physics, vol. 456,
1110066, Elsevier, 2022.
short: V. Inguva, E.Y. Kenig, J.B. Perot, Journal of Computational Physics 456 (2022).
date_created: 2023-04-27T15:58:12Z
date_updated: 2023-04-27T16:09:55Z
department:
- _id: '145'
intvolume: ' 456'
language:
- iso: eng
project:
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: Journal of Computational Physics
publication_status: published
publisher: Elsevier
quality_controlled: '1'
status: public
title: A front-tracking method for two-phase flow simulation with no spurious currents
type: journal_article
user_id: '90390'
volume: 456
year: '2022'
...
---
_id: '23785'
abstract:
- lang: eng
text: "Abstract\r\n In two-phase
flows in which the Capillary number is low, errors in the computation of the surface
tension force at the interface cause Front-Capturing methods such as Volume of
Fluid (VOF) and Level-Set (LS) to develop interfacial spurious currents. To better
solve low Capillary number flows, special treatment is required to reduce such
spurious currents. Smoothing the phase indicator field to more accurately compute
the curvature or adding interfacial artificial viscosity are techniques that can
treat this problem. This study explores OpenFOAM, Fluent and StarCCM+ VOF solvers
for the classical case of a static bubble/droplet immersed in a continuous aqueous
phase, with the focus on the ability of these solvers to adequately reduce spurious
currents. The results are expected to be helpful for practicing chemical engineers
who use multiphase CFD solvers in their work."
author:
- first_name: Venkatesh
full_name: Inguva, Venkatesh
id: '75069'
last_name: Inguva
- first_name: Andreas
full_name: Schulz, Andreas
id: '63109'
last_name: Schulz
- first_name: Eugeny
full_name: Kenig, Eugeny
id: '665'
last_name: Kenig
citation:
ama: 'Inguva V, Schulz A, Kenig E. On methods to reduce spurious currents within
VOF solver frameworks. Part 1: a review of the static bubble/droplet. Chemical
Product and Process Modeling. 2022;17:121-135.'
apa: 'Inguva, V., Schulz, A., & Kenig, E. (2022). On methods to reduce spurious
currents within VOF solver frameworks. Part 1: a review of the static bubble/droplet.
Chemical Product and Process Modeling, 17, 121–135.'
bibtex: '@article{Inguva_Schulz_Kenig_2022, title={On methods to reduce spurious
currents within VOF solver frameworks. Part 1: a review of the static bubble/droplet},
volume={17}, journal={Chemical Product and Process Modeling}, author={Inguva,
Venkatesh and Schulz, Andreas and Kenig, Eugeny}, year={2022}, pages={121–135}
}'
chicago: 'Inguva, Venkatesh, Andreas Schulz, and Eugeny Kenig. “On Methods to Reduce
Spurious Currents within VOF Solver Frameworks. Part 1: A Review of the Static
Bubble/Droplet.” Chemical Product and Process Modeling 17 (2022): 121–35.'
ieee: 'V. Inguva, A. Schulz, and E. Kenig, “On methods to reduce spurious currents
within VOF solver frameworks. Part 1: a review of the static bubble/droplet,”
Chemical Product and Process Modeling, vol. 17, pp. 121–135, 2022.'
mla: 'Inguva, Venkatesh, et al. “On Methods to Reduce Spurious Currents within VOF
Solver Frameworks. Part 1: A Review of the Static Bubble/Droplet.” Chemical
Product and Process Modeling, vol. 17, 2022, pp. 121–35.'
short: V. Inguva, A. Schulz, E. Kenig, Chemical Product and Process Modeling 17
(2022) 121–135.
date_created: 2021-09-06T09:59:46Z
date_updated: 2023-04-28T10:38:34Z
department:
- _id: '9'
- _id: '145'
intvolume: ' 17'
language:
- iso: eng
page: 121-135
publication: Chemical Product and Process Modeling
publication_identifier:
issn:
- 1934-2659
- 2194-6159
publication_status: published
quality_controlled: '1'
status: public
title: 'On methods to reduce spurious currents within VOF solver frameworks. Part
1: a review of the static bubble/droplet'
type: journal_article
user_id: '665'
volume: 17
year: '2022'
...