Unsteady Volumetric Entropy Generation Rate in Laminar Boundary Layers
The prediction of the entropy generation rate in laminar shear layers is treated as steady, even in the presence of high levels of free stream turbulence. Here we highlight the deficiencies of this approach by quantifying the magnitude of entropy generation rate fluctuations in the laminar boundary...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2006-02-01
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| Series: | Entropy |
| Subjects: | |
| Online Access: | http://www.mdpi.com/1099-4300/8/1/25/ |
| _version_ | 1817989887715966976 |
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| author | D. Hernon E. J. Walsh |
| author_facet | D. Hernon E. J. Walsh |
| author_sort | D. Hernon |
| collection | DOAJ |
| description | The prediction of the entropy generation rate in laminar shear layers is treated as steady, even in the presence of high levels of free stream turbulence. Here we highlight the deficiencies of this approach by quantifying the magnitude of entropy generation rate fluctuations in the laminar boundary layer subjected to free stream turbulence. We find fluctuation levels in excess of 100% in the near wall region, thereby indicating the need to account for the unsteadiness in laminar boundary layers subjected to free stream turbulence. |
| first_indexed | 2024-04-14T00:52:52Z |
| format | Article |
| id | doaj.art-be78314905174a8a8b66355ec3ee12a2 |
| institution | Directory Open Access Journal |
| issn | 1099-4300 |
| language | English |
| last_indexed | 2024-04-14T00:52:52Z |
| publishDate | 2006-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Entropy |
| spelling | doaj.art-be78314905174a8a8b66355ec3ee12a22022-12-22T02:21:44ZengMDPI AGEntropy1099-43002006-02-0181253010.3390/e8010025Unsteady Volumetric Entropy Generation Rate in Laminar Boundary LayersD. HernonE. J. WalshThe prediction of the entropy generation rate in laminar shear layers is treated as steady, even in the presence of high levels of free stream turbulence. Here we highlight the deficiencies of this approach by quantifying the magnitude of entropy generation rate fluctuations in the laminar boundary layer subjected to free stream turbulence. We find fluctuation levels in excess of 100% in the near wall region, thereby indicating the need to account for the unsteadiness in laminar boundary layers subjected to free stream turbulence.http://www.mdpi.com/1099-4300/8/1/25/laminar flowunsteady entropy generationdissipation coefficient. |
| spellingShingle | D. Hernon E. J. Walsh Unsteady Volumetric Entropy Generation Rate in Laminar Boundary Layers Entropy laminar flow unsteady entropy generation dissipation coefficient. |
| title | Unsteady Volumetric Entropy Generation Rate in Laminar Boundary Layers |
| title_full | Unsteady Volumetric Entropy Generation Rate in Laminar Boundary Layers |
| title_fullStr | Unsteady Volumetric Entropy Generation Rate in Laminar Boundary Layers |
| title_full_unstemmed | Unsteady Volumetric Entropy Generation Rate in Laminar Boundary Layers |
| title_short | Unsteady Volumetric Entropy Generation Rate in Laminar Boundary Layers |
| title_sort | unsteady volumetric entropy generation rate in laminar boundary layers |
| topic | laminar flow unsteady entropy generation dissipation coefficient. |
| url | http://www.mdpi.com/1099-4300/8/1/25/ |
| work_keys_str_mv | AT dhernon unsteadyvolumetricentropygenerationrateinlaminarboundarylayers AT ejwalsh unsteadyvolumetricentropygenerationrateinlaminarboundarylayers |