NUMERICAL AERODYNAMIC SIMULATION OF STEADY AND TRANSIENT FLOWS AROUND TWO-DIMENSIONAL BLUFF BODIES USING THE NONSTAGGERED GRID SYSTEM
作者:
Siva Parameswaran,
Ashwin Srinivasan,
Richard Sun,
期刊:
Numerical Heat Transfer, Part A: Applications
(Taylor Available online 1992)
卷期:
Volume 21,
issue 4
页码: 443-461
ISSN:1040-7782
年代: 1992
DOI:10.1080/10407789208944886
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The time-averaged Navier-Stokes equations are solved numerically by a finite-volume method and applied to study flow around two-dimensional bluff bodies. The finite-volume equations are formulated in strong conservative form on a general, nonorthogonal grid system. The resulting equations are then solved by an implicit, time marching, pressure-correction based algorithm. If the flow problem has a steady state solution, then it is obtained by taking sufficient time steps until Ike flow field remains unchanged with time. As test cases for the developed methodology, two problems are selected; one has a steady state solution and the other has only a transient solution. Numerical predictions are obtained with the standard k-ε turbulence model for the steady state, turbulent flow problem. The k-ε model was able to predict the major, experimentally observed flow characteristics including the small separation bubble near the rear end of the body selected for the steady state test case. For the transient test case, the algorithm correctly captured the transient nature of the problem. However, agreement with the experimental results was only moderate because of the lower order differencing scheme employed in the method.
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