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=== Underlying Flow Regime 2-12 ===
=== Underlying Flow Regime 2-12 ===
= Abstract =
= Abstract =
Interaction of inherently unsteady wakes created by bluff  bodies  with
Interaction of inherently unsteady wakes created by bluff  bodies  with other bodies or elements of the  same  body  is  a  complex  phenomenon
other bodies or elements of the  same  body  is  a  complex  phenomenon
commonly encountered in many flows of  technical  interest,  e.g.,  the oleo and hoses on  a  landing  gear,  high  lift  wing  configurations,
commonly encountered in many flows of  technical  interest,  e.g.,  the
environmental flows, heat exchanger fins, chimney stacks, off-shore oil platforms, etc.
oleo and hoses on  a  landing  gear,  high  lift  wing  configurations,
The flow past a tandem cylinders (TC)  is  a  prototype for many of such interaction  problems  and  possesses  some  of  their
environmental flows, heat exchanger fins, chimney stacks, off-shore oil
typical features (separation of turbulent boundary layer from the front cylinder and free shear layer roll-up,  interaction  of  unsteady  wake
platforms, etc. The flow past a tandem cylinders (TC)  is  a  prototype
with the downstream cylinder, and unsteady massively separated flow  in its wake), thus being a fairly general representative of the considered
for many of such interaction  problems  and  possesses  some  of  their
UFR.
    typical features (separation of turbulent boundary layer from the front
This motivated an experimental campaign of NASA  Langley  Research Center aimed at accumulating reliable benchmark data for the  TC  flow.
    cylinder and free shear layer roll-up,  interaction  of  unsteady  wake
These data have been used in the course of two subsequent international CFD  campaigns  (EU Project  ATAAC  and  BANC-I  Workshop)  aimed  at
    with the downstream cylinder, and unsteady massively separated flow  in
evaluating a capability of different  turbulence  modelling  approaches and numerical methods to reproduce properly complex turbulent flows, in
    its wake), thus being a fairly general representative of the considered
general, and the high Reynolds number TC flow, in particular.
    UFR. This motivated an experimental campaign of NASA  Langley  Research
A purpose of this document is to summarise results of simulations of the TC  flow carried out within the ATAAC project.
    Center aimed at accumulating reliable benchmark data for the  TC  flow.
Together with a similar  analysis of the computational studies presented at  the  BANC-I  Workshop, this gives a clear vision of  both
    These data have been used in the course of two subsequent international
capabilities and  restrictions of the current CFD methods and turbulence modelling strategies with regard  to the considered UFR.
    CFD  campaigns  (EU Project  ATAAC  and  BANC-I  Workshop)  aimed  at
    evaluating a capability of different  turbulence  modelling  approaches
    and numerical methods to reproduce properly complex turbulent flows, in
    general, and the high Reynolds number TC flow, in particular. A purpose
    of this document is to summarise results of simulations of the TC  flow
    carried out within the ATAAC project. Together with a similar  analysis
    of the computational studies presented at  the  BANC-I  Workshop, this
    gives a clear vision of  both capabilities and  restrictions of the
    current CFD methods and turbulence modelling strategies with regard  to
    the considered UFR.
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Revision as of 09:17, 26 October 2012

Turbulent Flow Past Two-Body Configurations

Front Page

Description

Test Case Studies

Evaluation

Best Practice Advice

References

Flows Around Bodies

Underlying Flow Regime 2-12

Abstract

Interaction of inherently unsteady wakes created by bluff bodies with other bodies or elements of the same body is a complex phenomenon commonly encountered in many flows of technical interest, e.g., the oleo and hoses on a landing gear, high lift wing configurations, environmental flows, heat exchanger fins, chimney stacks, off-shore oil platforms, etc. The flow past a tandem cylinders (TC) is a prototype for many of such interaction problems and possesses some of their typical features (separation of turbulent boundary layer from the front cylinder and free shear layer roll-up, interaction of unsteady wake with the downstream cylinder, and unsteady massively separated flow in its wake), thus being a fairly general representative of the considered UFR. This motivated an experimental campaign of NASA Langley Research Center aimed at accumulating reliable benchmark data for the TC flow. These data have been used in the course of two subsequent international CFD campaigns (EU Project ATAAC and BANC-I Workshop) aimed at evaluating a capability of different turbulence modelling approaches and numerical methods to reproduce properly complex turbulent flows, in general, and the high Reynolds number TC flow, in particular. A purpose of this document is to summarise results of simulations of the TC flow carried out within the ATAAC project. Together with a similar analysis of the computational studies presented at the BANC-I Workshop, this gives a clear vision of both capabilities and restrictions of the current CFD methods and turbulence modelling strategies with regard to the considered UFR.



Contributed by: A. Garbaruk, M. Shur and M. Strelets — New Technologies and Services LLC (NTS) and St.-Petersburg State Polytechnic University

Front Page

Description

Test Case Studies

Evaluation

Best Practice Advice

References


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