AIAA 2002-3280 Variational Multiscale Modeling for Turbulence Control
نویسندگان
چکیده
We explore the capabilities of the variational multiscale (VMS) method in the context of turbulence control by applying VMS to the simulation of a simple opposition control strategy for turbulent channel flow with the results compared to prior direct numerical simulations and large-eddy simulations (LES). In all cases, the VMS method is found to be more efficient and more accurate than traditional LES with the dynamic subgrid-scale model. The simplicity, accuracy, and generality of VMS makes it particularly attractive for turbulence control investigations.
منابع مشابه
Variational Multiscale Residual-driven Turbulence Modeling for Large Eddy Simulation of Incompressible Flow
The objectives of recent variational multiscale work in turbulence have been to capture all scales consistently and to avoid use of eddy viscosities altogether. This holds the promise of more accurate and efficient LES procedures. In this work, we describe a new variational multiscale formulation, which makes considerable progress toward these goals.
متن کاملThe Role of Continuity in Residual-Based Variational Multiscale Modeling of Turbulence
This paper examines the role of continuity of the basis in the computation of turbulent flows. We compare standard finite elements and NURBS (non-uniform rational B-splines) discretizations that are employed in Isogeometric Analysis [23]. We make use of quadratic discretizations that are C-continuous across element boundaries in standard finite elements, and C-continuous in the case of NURBS. T...
متن کاملA Variational Multiscale Method with Multifractal Subgrid-scale Modeling for Large-eddy Simulation of Turbulent Flow
A variational multiscale method with multifractal subgrid-scale modeling is proposed for large-eddy simulation of turbulent flow. In the multifractal subgrid-scale modeling approach, the subgrid-scale velocity is evaluated from a multifractal description of the subgrid-scale vorticity, which is based on the multifractal scale similarity of gradient fields in turbulent flow. The multifractal sub...
متن کاملMonitoring Unresolved Scales in Multiscale Turbulence Modeling
This paper extends the two-level Variational MultiScale (VMS) method for Large-Eddy Simulation, introduced by Hughes et al. [Comput. Visual. Sci., 3:47–59 (2000)], to a threelevel approach that clarifies the role of unresolved scales of motion on the resolved scales. It is shown that the multi-scale framework does not obviate modeling on the large-scales, but that VMS allows for different model...
متن کاملAIAA Turbulence Control using the Variational Multi-Scale (VMS) Method
The viability of the Variational Multi-Scale (VMS), an approach for Large Eddy Simulation (LES), in the context of turbulence control is explored. First, we validate our VMS implementation for a fully-developed turbulent channel. Later, VMS results for opposition control of the turbulent channel flow are compared against available Direct Numerical Simulation (DNS) and LES using dynamic subgrid-...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2002