Neutrally- and stably-stratified boundary layers adjustments to a step change in surface roughness
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| Định dạng: | Sách |
| Ngôn ngữ: | English |
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Springer
2023
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| Truy cập trực tuyến: | https://link.springer.com/article/10.1007/s00348-023-03626-7 https://dlib.phenikaa-uni.edu.vn/handle/PNK/8047 |
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oai:localhost:PNK-80472023-04-18T08:22:19Z Neutrally- and stably-stratified boundary layers adjustments to a step change in surface roughness Shan-Shan, Ding Marco, Placidi Matteo, Carpentieri internal boundary layer EnFlo CC BY In this work, we study the development of the internal boundary layer (IBL) induced by a surface roughness discontinuity, where the downstream surface has a roughness length greater than that upstream. The work is carried out in the EnFlo meteorological wind tunnel, at the University of Surrey, in both thermally neutral and stable cases with varying degrees of stability. For the neutrally-stratified boundary layer, the IBL development in the log-law region shows good agreement with the diffusion model proposed by Panofsky and Dutton (Atmospheric turbulence, Wiley, New York, 1984) provided that a modified origin condition is introduced and its growth rate is dictated by a constant diffusion term. However, the model over-predicts the growth of the IBL in the outer layer, where the IBL depth grows slowly with fetch following a power function with exponent n being 0.61 (whereas the original model prescribes n≈0.8). For the stably-stratified boundary layers, n is found to further reduce as the bulk Richardson number, Rib, increases. 2023-04-18T08:22:19Z 2023-04-18T08:22:19Z 2023 Book https://link.springer.com/article/10.1007/s00348-023-03626-7 https://dlib.phenikaa-uni.edu.vn/handle/PNK/8047 en application/pdf Springer |
| institution |
Digital Phenikaa |
| collection |
Digital Phenikaa |
| language |
English |
| topic |
internal boundary layer EnFlo |
| spellingShingle |
internal boundary layer EnFlo Shan-Shan, Ding Marco, Placidi Matteo, Carpentieri Neutrally- and stably-stratified boundary layers adjustments to a step change in surface roughness |
| description |
CC BY |
| format |
Book |
| author |
Shan-Shan, Ding Marco, Placidi Matteo, Carpentieri |
| author_facet |
Shan-Shan, Ding Marco, Placidi Matteo, Carpentieri |
| author_sort |
Shan-Shan, Ding |
| title |
Neutrally- and stably-stratified boundary layers adjustments to a step change in surface roughness |
| title_short |
Neutrally- and stably-stratified boundary layers adjustments to a step change in surface roughness |
| title_full |
Neutrally- and stably-stratified boundary layers adjustments to a step change in surface roughness |
| title_fullStr |
Neutrally- and stably-stratified boundary layers adjustments to a step change in surface roughness |
| title_full_unstemmed |
Neutrally- and stably-stratified boundary layers adjustments to a step change in surface roughness |
| title_sort |
neutrally- and stably-stratified boundary layers adjustments to a step change in surface roughness |
| publisher |
Springer |
| publishDate |
2023 |
| url |
https://link.springer.com/article/10.1007/s00348-023-03626-7 https://dlib.phenikaa-uni.edu.vn/handle/PNK/8047 |
| _version_ |
1763543258455080960 |
| score |
8.8926115 |