Unsteady Friction Modeling Technique for Lagrangian Approaches in Transient Simulations
This study investigates the simulation of celerity attenuation and head damping in transient flows using a Lagrangian approach rather than an Eulerian approach. Typically, the Lagrangian approach requires orders of magnitude fewer calculations, resulting in the rapid solution of very large systems....
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-08-01
|
| Series: | Water |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4441/14/15/2437 |
| _version_ | 1797411883085463552 |
|---|---|
| author | Mohamad Zeidan Avi Ostfeld |
| author_facet | Mohamad Zeidan Avi Ostfeld |
| author_sort | Mohamad Zeidan |
| collection | DOAJ |
| description | This study investigates the simulation of celerity attenuation and head damping in transient flows using a Lagrangian approach rather than an Eulerian approach. Typically, the Lagrangian approach requires orders of magnitude fewer calculations, resulting in the rapid solution of very large systems. Additionally, it is based on a simple physical model. As the method is continuous in both time and space, it is less sensitive to the structure of the network and the length of the simulation process. Most recent studies, however, have focused on the development and improvement of computational routines for modeling in an Eulerian environment. This results in the development of adequate models that are suitable for Eulerian models but not applicable in Lagrangian-based models. As a result of this fixation, a bias was created towards using Eulerian approaches in transient simulations. It also diverts resources from further development of Lagrangian models. Consequently, it is necessary to develop a friction model that is more accurate and compatible with Lagrangian methods without compromising their performance. To the authors’ knowledge, such a model is yet to be published in the literature. This study presents a new friction modeling technique that compensates for both the local and convective acceleration terms for the Lagrangian transient modeling approach without compromising the computational time. |
| first_indexed | 2024-03-09T04:52:41Z |
| format | Article |
| id | doaj.art-2bb52fdc8a634556b653407829a1fb61 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-09T04:52:41Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-2bb52fdc8a634556b653407829a1fb612023-12-03T13:09:09ZengMDPI AGWater2073-44412022-08-011415243710.3390/w14152437Unsteady Friction Modeling Technique for Lagrangian Approaches in Transient SimulationsMohamad Zeidan0Avi Ostfeld1Faculty of Civil and Environmental Engineering, Technion—Israel Institute of Technology, Haifa 32000, IsraelFaculty of Civil and Environmental Engineering, Technion—Israel Institute of Technology, Haifa 32000, IsraelThis study investigates the simulation of celerity attenuation and head damping in transient flows using a Lagrangian approach rather than an Eulerian approach. Typically, the Lagrangian approach requires orders of magnitude fewer calculations, resulting in the rapid solution of very large systems. Additionally, it is based on a simple physical model. As the method is continuous in both time and space, it is less sensitive to the structure of the network and the length of the simulation process. Most recent studies, however, have focused on the development and improvement of computational routines for modeling in an Eulerian environment. This results in the development of adequate models that are suitable for Eulerian models but not applicable in Lagrangian-based models. As a result of this fixation, a bias was created towards using Eulerian approaches in transient simulations. It also diverts resources from further development of Lagrangian models. Consequently, it is necessary to develop a friction model that is more accurate and compatible with Lagrangian methods without compromising their performance. To the authors’ knowledge, such a model is yet to be published in the literature. This study presents a new friction modeling technique that compensates for both the local and convective acceleration terms for the Lagrangian transient modeling approach without compromising the computational time.https://www.mdpi.com/2073-4441/14/15/2437transientWCMwater hammerunsteady friction |
| spellingShingle | Mohamad Zeidan Avi Ostfeld Unsteady Friction Modeling Technique for Lagrangian Approaches in Transient Simulations Water transient WCM water hammer unsteady friction |
| title | Unsteady Friction Modeling Technique for Lagrangian Approaches in Transient Simulations |
| title_full | Unsteady Friction Modeling Technique for Lagrangian Approaches in Transient Simulations |
| title_fullStr | Unsteady Friction Modeling Technique for Lagrangian Approaches in Transient Simulations |
| title_full_unstemmed | Unsteady Friction Modeling Technique for Lagrangian Approaches in Transient Simulations |
| title_short | Unsteady Friction Modeling Technique for Lagrangian Approaches in Transient Simulations |
| title_sort | unsteady friction modeling technique for lagrangian approaches in transient simulations |
| topic | transient WCM water hammer unsteady friction |
| url | https://www.mdpi.com/2073-4441/14/15/2437 |
| work_keys_str_mv | AT mohamadzeidan unsteadyfrictionmodelingtechniqueforlagrangianapproachesintransientsimulations AT aviostfeld unsteadyfrictionmodelingtechniqueforlagrangianapproachesintransientsimulations |