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Neutrally- and stably-stratified boundary layers adjustments to a step change in surface roughness

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Main Authors: Shan-Shan, Ding, Marco, Placidi, Matteo, Carpentieri
Format: Book
Language:English
Published: Springer 2023
Subjects:
internal boundary layer
EnFlo
Online Access:https://link.springer.com/article/10.1007/s00348-023-03626-7
https://dlib.phenikaa-uni.edu.vn/handle/PNK/8047
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spelling 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

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