語系:
繁體中文
English
說明(常見問題)
回圖書館首頁
手機版館藏查詢
登入
回首頁
切換:
標籤
|
MARC模式
|
ISBD
Dynamical systems models of wall-bou...
~
Gibson, John Francis.
FindBook
Google Book
Amazon
博客來
Dynamical systems models of wall-bounded, shear-flow turbulence.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
Dynamical systems models of wall-bounded, shear-flow turbulence./
作者:
Gibson, John Francis.
面頁冊數:
219 p.
附註:
Source: Dissertation Abstracts International, Volume: 63-07, Section: B, page: 3365.
Contained By:
Dissertation Abstracts International63-07B.
標題:
Engineering, Aerospace. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3059142
ISBN:
0493750282
Dynamical systems models of wall-bounded, shear-flow turbulence.
Gibson, John Francis.
Dynamical systems models of wall-bounded, shear-flow turbulence.
- 219 p.
Source: Dissertation Abstracts International, Volume: 63-07, Section: B, page: 3365.
Thesis (Ph.D.)--Cornell University, 2002.
A rigid wall constrains and simplifies turbulence in its vicinity. In the near-wall region, turbulent flow is dominated by a few energetic structures. Aubry, Holmes, Lumley, and Stone [1] developed low-dimensional dynamical systems models of the turbulent boundary layer, using the proper orthogonal decomposition (POD) to identify the dominant structures and Galerkin projection of the Navier-Stokes equations to derive their equations of motion. Their models reproduced important qualitative features of boundary-layer dynamics, most importantly, the growth, bursting, and reformation of counter-rotating streamwise vortices. We reexamine Aubry <italic>et al</italic>.'s models, in an effort to improve their quantitative accuracy, in both predictive and statistical senses. We find that POD models are stable in some parameter regions, despite the lack of upper-surface velocity boundary conditions. For predictive accuracy, however, enforcement of velocity boundary conditions and accurate specification of the upper-surface pressure signal are necessary, for the cases considered. We propose that plane Couette flow is a closely related but better-posed test case than the boundary-layer for dynamical-systems modeling of turbulence. For the simplest plane Couette systems, we find that very large truncation dimensions (0(1000)) are necessary to reproduce the qualitative behavior and statistical measures of the dominant structures. We find that eddy-viscosity is an ineffective model for the unresolved modes of moderate truncation dimensions (O(100)), but numerical results suggest that unresolved-mode modeling is possible in principle.
ISBN: 0493750282Subjects--Topical Terms:
1018395
Engineering, Aerospace.
Dynamical systems models of wall-bounded, shear-flow turbulence.
LDR
:02513nmm 2200277 4500
001
1810349
005
20040126131514.5
008
130610s2002 eng d
020
$a
0493750282
035
$a
(UnM)AAI3059142
035
$a
AAI3059142
040
$a
UnM
$c
UnM
100
1
$a
Gibson, John Francis.
$3
1899961
245
1 0
$a
Dynamical systems models of wall-bounded, shear-flow turbulence.
300
$a
219 p.
500
$a
Source: Dissertation Abstracts International, Volume: 63-07, Section: B, page: 3365.
500
$a
Adviser: John L. Lumley.
502
$a
Thesis (Ph.D.)--Cornell University, 2002.
520
$a
A rigid wall constrains and simplifies turbulence in its vicinity. In the near-wall region, turbulent flow is dominated by a few energetic structures. Aubry, Holmes, Lumley, and Stone [1] developed low-dimensional dynamical systems models of the turbulent boundary layer, using the proper orthogonal decomposition (POD) to identify the dominant structures and Galerkin projection of the Navier-Stokes equations to derive their equations of motion. Their models reproduced important qualitative features of boundary-layer dynamics, most importantly, the growth, bursting, and reformation of counter-rotating streamwise vortices. We reexamine Aubry <italic>et al</italic>.'s models, in an effort to improve their quantitative accuracy, in both predictive and statistical senses. We find that POD models are stable in some parameter regions, despite the lack of upper-surface velocity boundary conditions. For predictive accuracy, however, enforcement of velocity boundary conditions and accurate specification of the upper-surface pressure signal are necessary, for the cases considered. We propose that plane Couette flow is a closely related but better-posed test case than the boundary-layer for dynamical-systems modeling of turbulence. For the simplest plane Couette systems, we find that very large truncation dimensions (0(1000)) are necessary to reproduce the qualitative behavior and statistical measures of the dominant structures. We find that eddy-viscosity is an ineffective model for the unresolved modes of moderate truncation dimensions (O(100)), but numerical results suggest that unresolved-mode modeling is possible in principle.
590
$a
School code: 0058.
650
4
$a
Engineering, Aerospace.
$3
1018395
650
4
$a
Physics, Fluid and Plasma.
$3
1018402
690
$a
0538
690
$a
0759
710
2 0
$a
Cornell University.
$3
530586
773
0
$t
Dissertation Abstracts International
$g
63-07B.
790
1 0
$a
Lumley, John L.,
$e
advisor
790
$a
0058
791
$a
Ph.D.
792
$a
2002
856
4 0
$u
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3059142
筆 0 讀者評論
館藏地:
全部
電子資源
出版年:
卷號:
館藏
1 筆 • 頁數 1 •
1
條碼號
典藏地名稱
館藏流通類別
資料類型
索書號
使用類型
借閱狀態
預約狀態
備註欄
附件
W9171087
電子資源
11.線上閱覽_V
電子書
EB
一般使用(Normal)
在架
0
1 筆 • 頁數 1 •
1
多媒體
評論
新增評論
分享你的心得
Export
取書館
處理中
...
變更密碼
登入