Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Hans Wengle"'
Autor:
Hans Wengle, Jens Neumann
Publikováno v:
Flow, Turbulence and Combustion (formerly Applied Scientific Research). 71:297-310
A passive control approach (no external energy input) for an unsteady separated flow case was investigated numerically. A surface-mounted control fence was positioned upstream of a backward-facing step, and as an oncoming flow a thin and fully develo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a3a98813cba8bb9875327d15191c9954
https://doi.org/10.1023/b:appl.0000014915.18571.06
https://doi.org/10.1023/b:appl.0000014915.18571.06
Publikováno v:
European Journal of Mechanics - B/Fluids. 20:25-46
Results from a joint experimental and direct numerical simulation (DNS) investigation are presented for the flow over a backward-facing step manipulated by low-amplitude time-periodic (harmonic) blowing/suction excitation through a narrow slot at the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::68037de3b4d7222ecab7fe157cb971fa
https://doi.org/10.1016/s0997-7546(00)01105-5
https://doi.org/10.1016/s0997-7546(00)01105-5
Autor:
Alexander Orellano, Hans Wengle
Publikováno v:
European Journal of Mechanics - B/Fluids. 19:765-788
Results from numerical simulations are presented for manipulated turbulent boundary layer flow over a surface-mounted fence, for a Reynolds number of Re h =3000 (based on fence height, h , and maximum inflow velocity, U ∞ ). First, a reference data
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c69e41290727f0c040aba1e31ed4745b
https://doi.org/10.1016/s0997-7546(00)00115-1
https://doi.org/10.1016/s0997-7546(00)00115-1
Publikováno v:
Journal of Wind Engineering and Industrial Aerodynamics. 35:129-147
Results from numerical simulations of turbulent flow around a surface-mounted cube and over a surface-mounted square rib are presented. The first problem is treated by solving the Reynolds equations together with the standard k − ϵ turbulence mode
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d6da492f26845dd57056c6e1fc1a72f5
https://doi.org/10.1016/0167-6105(90)90213-v
https://doi.org/10.1016/0167-6105(90)90213-v
Autor:
Jens Neumann, Hans Wengle
Publikováno v:
Journal of Turbulence. 5
The influence of a passive (no external energy input) and an active (via energy input) forcing method on the coherent structures in different separated and reattaching flows is investigated. A (passive) surface-mounted fence and an (actively) oscilla
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1648eff99a6e294baa9b6f5c41e46e8e
https://doi.org/10.1088/1468-5248/5/1/022
https://doi.org/10.1088/1468-5248/5/1/022
Autor:
Jens Neumann, Hans Wengle
Publikováno v:
Direct and Large-Eddy Simulation V ISBN: 9789048165759
The influence of a passive (no external energy input) and an active (via energy input) control method on the flow characteristics of a turbulent separated and reattaching flow is investigated. A surface-mounted fence and an oscillating blowing/suctio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e0701f6cab59ec71566618c86407a1a5
https://doi.org/10.1007/978-1-4020-2313-2_58
https://doi.org/10.1007/978-1-4020-2313-2_58
Publikováno v:
Notes on Numerical Fluid Mechanics and Multidisciplinary Design (NNFM) ISBN: 9783642536533
Results from large-eddy simulations (LES) of the spatial development of a shearless turbulence mixing layer are presented. The study is related to the mixing of two turbulent fields having different dominant length scales and levels of turbulent kine
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::65cf355833cd22888c10367990cb93a2
https://doi.org/10.1007/978-3-540-45693-3_18
https://doi.org/10.1007/978-3-540-45693-3_18
Autor:
Jens Neumann, Hans Wengle
Publikováno v:
High Performance Computing in Science and Engineering, Munich 2002 ISBN: 9783642624469
In order to attain a certain desired behaviour of turbulent flow, such as drag reduction, minimization/maximization of mixing or the reduction of separation, the basic idea is to control the flow by interacting with the coherent (large-scale) structu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ada16ddb7c51abeaa1cc759f06f4db3
https://doi.org/10.1007/978-3-642-55526-8_7
https://doi.org/10.1007/978-3-642-55526-8_7
Autor:
Hans Wengle, A. Meri
Publikováno v:
Fluid Mechanics and Its Applications ISBN: 9781402004865
Results are presented from a Direct Numerical Simulation (DNS) and Large-Eddy Simulations (LES) of turbulent flow over a backward-facing step (Re h =3300) with a fully developed channel flow (Rc τ=180) utilized asatime-dependent inflow condition. Nu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::769f409a4983a3c9aa0101539795461b
https://doi.org/10.1007/0-306-48383-1_7
https://doi.org/10.1007/0-306-48383-1_7
Autor:
Hans Wengle, Jens Neumann
Publikováno v:
Direct and Large-Eddy Simulation IV ISBN: 9789048158935
An active control approach based on time-periodic forcing of turbulent separated flows with reattachment is presented. Large-Eddy Simulations (LES) together with an adaptive feedback control scheme are performed in order to obtain the dependence of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::52d93879fa432f326139cfa9643ba13c
https://doi.org/10.1007/978-94-017-1263-7_51
https://doi.org/10.1007/978-94-017-1263-7_51