Investigation of oscillations in katabatic Prandtl slope flows
Investigation of oscillations in katabatic Prandtl slope flows
复制标题
普朗特斜率下降流振荡的研究
DOI:
10.1002/qj.4405
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发表时间:
2022
影响因子:
8.9
通讯作者:
Senocak, Inanc
中科院分区:
文献类型:
--
作者:
Henao‐Garcia, Sebastian;Xiao, Cheng‐Nian;Senocak, Inanc
Dynamically unstable katabatic Prandtl slope flows are studied via numerical simulations and spectral analysis. Results confirm the presence of aperiodic temporal and spatial oscillations in the flow fields due to the emergence and propagation of flow instabilities. Dampeden masseoscillations are observed to dominate the initial oscillatory stage of laminar katabatic slope flows. Stationary longitudinal rolls, which are dominant at shallow slopes, are observed to meander with increasing stratification perturbation parameter and the average distance between the rolls exhibits a strong dependence on slope inclination for slope angles less than 35∘$$ 3{5}^{\circ } $$. At much steeper slopes, traveling slope waves emerge and they are transported at the mean jet velocity. Both types of instability rolls coexist for certain combinations of dimensionless parameters, forming intricate structures that break into smaller eddies as the flow becomes more dynamically unstable. In the dynamically unstable nonturbulent regime,en masseoscillations are insignificant, but their normalised frequency can be used to discern the type of flow instability.
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影响因子:
3.7
作者:
Xiao, Cheng-Nian;Senocak, Inanc
通讯作者:
Senocak, Inanc
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
I. Stiperski;I. Kavčič;B. Grisogono;D. Durran
通讯作者:
D. Durran
影响因子:
3.7
作者:
Xiao, Cheng-Nian;Senocak, Inanc
通讯作者:
Senocak, Inanc
影响因子:
3.7
作者:
Alan Shapiro;E. Fedorovich
通讯作者:
E. Fedorovich
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
A. Brazel;H. Fernando;J. Hunt;N. Selover;B. Hedquist;E. Pardyjak
通讯作者:
E. Pardyjak