Spectral element-Fourier methods applied to simulation of turbulent pipe flow
نویسندگان
چکیده
منابع مشابه
Manipulating Flow Structures in Turbulent Pipe Flow
Two different tools, the non-empirical resolvent analysis and the data-based dynamic mode decomposition, are employed to assess the changes induced by transpiration in the dynamics of a turbulent pipe flow. The focus is on very large-scale motions. Both analyses permit the observation of streamwise waviness in the large flow structures and how the transpiration can inhibit fluctuation in locali...
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چکیده ندارد.
15 صفحه اولSpectral Element Based Dynamic Large Eddy Simulation of Turbulent Channel Flow
In this study the dynamic Smagorinsky model (DSM) has been incorporated into a spectral element method and applied in a large eddy simulation (LES) of a turbulent channel flow. The dynamic procedure estimates the parameter of the Smagorinsky model (SM), thereby allowing for an adaption of the mixing length to the local turbulent state during the simulation. As expected, strong fluctuations of t...
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A spectral element—Fourier method (SEM) for Direct Numerical Simulation (DNS) of the turbulent flow of non-Newtonian fluids is described and the particular requirements for non-Newtonian rheology are discussed. The method is implemented in parallel using the MPI message passing kernel, and execution times scale somewhat less than linearly with the number of CPUs, however this is more than compe...
متن کاملTurbulent pipe flow of shear-thinning fluids
Direct numerical simulation of the weakly turbulent flow of non-Newtonian fluids is undertaken for two different generalised Newtonian rheology models using a spectral element-Fourier method. Results for a power law (shear-thinning) rheology agree well with experimentally determined logarithmic layer correlations and with other previously published experimental work. As the flow index becomes s...
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ژورنال
عنوان ژورنال: ANZIAM Journal
سال: 2000
ISSN: 1445-8810
DOI: 10.21914/anziamj.v42i0.630