Time-periodic incompressible flow simulation using non-linear frequency domain approach
The capability of nonlinear reduced frequency domain (NLFD) approach in predicting the flow field of time-periodic incompressible flow is investigated. The efficient NLFD method uses Fourier series representation in time considering the assumption of solution periodicity and the resulting nonlinear...
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| Format: | Article |
| Language: | English |
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Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek
2017-01-01
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| Series: | Tehnički Vjesnik |
| Subjects: | |
| Online Access: | https://hrcak.srce.hr/file/277432 |
| _version_ | 1797207789635895296 |
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| author | M. H. Shojaeefard A. Khorampanahi M. Kharati Koopaee |
| author_facet | M. H. Shojaeefard A. Khorampanahi M. Kharati Koopaee |
| author_sort | M. H. Shojaeefard |
| collection | DOAJ |
| description | The capability of nonlinear reduced frequency domain (NLFD) approach in predicting the flow field of time-periodic incompressible flow is investigated. The efficient NLFD method uses Fourier series representation in time considering the assumption of solution periodicity and the resulting nonlinear equations are solved using pseudo-spectral approach. In this manner, the desired periodic solution can directly be obtained without the need to solve the initial transient part. Thus, without loss of generality a considerable computational cost reduction can be achieved in comparison with the common time-accurate methods. In the present algorithm (INLFD) the NLFD approach is used to solve the flow field in an incompressible formulation and the validation is performed using some periodic test cases with analytical solutions. The results show that capturing only a limited number of temporal modes can provide an accurate estimation of the flow field. Finally, the computational costs of the INLFD and a time-accurate method are also compared which demonstrate the efficiency of the INLFD method in representing nonlinear flow field physics by savings in computational time up to 50 percent. |
| first_indexed | 2024-04-24T09:28:30Z |
| format | Article |
| id | doaj.art-18aae48a51164dea81b86fe697504be1 |
| institution | Directory Open Access Journal |
| issn | 1330-3651 1848-6339 |
| language | English |
| last_indexed | 2024-04-24T09:28:30Z |
| publishDate | 2017-01-01 |
| publisher | Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek |
| record_format | Article |
| series | Tehnički Vjesnik |
| spelling | doaj.art-18aae48a51164dea81b86fe697504be12024-04-15T14:25:27ZengFaculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in OsijekTehnički Vjesnik1330-36511848-63392017-01-012451307131410.17559/TV-20150707172830Time-periodic incompressible flow simulation using non-linear frequency domain approachM. H. Shojaeefard0A. Khorampanahi1M. Kharati Koopaee2Faculty of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran, Iran, 168461Faculty of Mechanical Engineering, Iran University of Science and Technology, Narmak, Tehran, Iran, 168461Faculty of Mechanical Engineering, Shitaz University of Technology, Modares Blv., Shiraz, Iran, 715571The capability of nonlinear reduced frequency domain (NLFD) approach in predicting the flow field of time-periodic incompressible flow is investigated. The efficient NLFD method uses Fourier series representation in time considering the assumption of solution periodicity and the resulting nonlinear equations are solved using pseudo-spectral approach. In this manner, the desired periodic solution can directly be obtained without the need to solve the initial transient part. Thus, without loss of generality a considerable computational cost reduction can be achieved in comparison with the common time-accurate methods. In the present algorithm (INLFD) the NLFD approach is used to solve the flow field in an incompressible formulation and the validation is performed using some periodic test cases with analytical solutions. The results show that capturing only a limited number of temporal modes can provide an accurate estimation of the flow field. Finally, the computational costs of the INLFD and a time-accurate method are also compared which demonstrate the efficiency of the INLFD method in representing nonlinear flow field physics by savings in computational time up to 50 percent.https://hrcak.srce.hr/file/277432incompressible flownon-linear reduced frequencypressure Poissonpseudo-spectraltime-periodic |
| spellingShingle | M. H. Shojaeefard A. Khorampanahi M. Kharati Koopaee Time-periodic incompressible flow simulation using non-linear frequency domain approach Tehnički Vjesnik incompressible flow non-linear reduced frequency pressure Poisson pseudo-spectral time-periodic |
| title | Time-periodic incompressible flow simulation using non-linear frequency domain approach |
| title_full | Time-periodic incompressible flow simulation using non-linear frequency domain approach |
| title_fullStr | Time-periodic incompressible flow simulation using non-linear frequency domain approach |
| title_full_unstemmed | Time-periodic incompressible flow simulation using non-linear frequency domain approach |
| title_short | Time-periodic incompressible flow simulation using non-linear frequency domain approach |
| title_sort | time periodic incompressible flow simulation using non linear frequency domain approach |
| topic | incompressible flow non-linear reduced frequency pressure Poisson pseudo-spectral time-periodic |
| url | https://hrcak.srce.hr/file/277432 |
| work_keys_str_mv | AT mhshojaeefard timeperiodicincompressibleflowsimulationusingnonlinearfrequencydomainapproach AT akhorampanahi timeperiodicincompressibleflowsimulationusingnonlinearfrequencydomainapproach AT mkharatikoopaee timeperiodicincompressibleflowsimulationusingnonlinearfrequencydomainapproach |