...-u.ac.jp Email: yagi.tomomi.7a@kyoto-u.ac.jp 19 02 2021 05 05 2021 05 05 2021 24 05 2021 aerodynamics computational mechanics mechanical properties of materials turbulence Airborne salt accelerates the corrosion of steel materials and, thus, must...

... in the J ournal of A pplied M echanics . 10 11 2020 18 12 2020 18 12 2020 07 01 2021 postbuckled structures free vibration thin film viscoelasticity dynamics turbulence structures vibration Taking advantage of the good mechanical properties, stable chemical...

... water level to better capture the turbulent wake generated by the upstream turbine and the free-surface evolution. Figure 7 shows the problem setup and a snapshot of the mesh on a planar cut. The domain is divided into three subdomains separated by two cylinder-shaped sliding interfaces. Table 3...

...Y. Bazilevs; J. Yan; M. de Stadler; S. Sarkar A highly resolved computation of the flow past a sphere at Reynolds number Re = 3700 using a finite element method (FEM)-based residual-based variational multiscale (RBVMS) formulation is performed. Both uniform and turbulent inflow conditions...

... Navier–Stokes SST = shear stress transport TKE = turbulent kinetic energy URANS = unsteady RANS References [1] Dörfler , P. , Sick , M. , and Coutu , A. , 2013 , Flow-Induced Pulsation and Vibration in Hydroelectric Machinery , Springer , London , Chap. 2...

... ) ) C l = loss coefficient ( ≡ ( E ( 0 ) - E ( z ) ) / K ( 0 ) = C kr - C pr ) C pr = pressure recovery coefficient ( ≡ ( Π ( z ) - Π ( 0 ) ) / K ( 0 ) ) C μ = turbulence model constant D = runner diameter E...

... component x spatial coordinate Greek Symbols δ kronecker δ κ thermal conductivity μ molecular viscosity μ t turbulent viscosity ν kinematics viscosity ρ mass density τ viscous stress...

...-Uniform Rational B-splines) basis functions which have been proven to be highly accurate in LES of turbulent flows (Bazilevs, Y., et al. 2007, Comput. Methods Appl. Mech. Eng., 197 , pp. 173–201). LC consists of stream-wise vortices in the direction of the wind acting as a secondary flow structure...

...-rectifying turbine in the sense that it maintains the same direction of rotation as the airflow changes direction. The blades of the turbine are symmetrical, and here we consider straight and swept blades, both with constant chord. The turbulent flow physics involved in the complex, unsteady flow is governed...

... with big space coherence. In the opposite, the results obtained with the fine pore plate show a flow close to a fully developed turbulent channel flow. The comparison of the aerodynamic field with computational simulations based on a Reynolds-averaged Navier-Stokes (RANS) model underlines the difficulties...

... phase effects and using two-way coupling method, simulation accuracy noticeably has been improved. Three models, the k − ε model, the Reynolds stress model (RSM) without considering air core, and Reynolds stress turbulence model with volume of fluid multiphase model for simulating air core, were...

...Rafik Absi The semitheoretical function of Nezu and Nakagawa (1993, Turbulence in Open-Channel Flows, A. A. Balkema, ed., Rotterdam, The Netherlands) for the turbulent kinetic energy k is valid only where local equilibrium is a good approximation. From an estimation of the difference between...

..., surface pressure distributions, and streamline plots are calculated for circular, plane, and annular impinging jets. The models show excellent agreement with existing experimental results in both laminar and turbulent conditions and for different Reynolds numbers. 19 02 2007 19 07 2007 27...

...L. G. Margolin; P. K. Smolarkiewicz; A. A. Wyszogradzki We describe a series of computational experiments that employ nonoscillatory finite volume methods to simulate the decay of high Reynolds number turbulence. These experiments cover a broad range of physical viscosities and numerical...

... turbulence to SGS portion. Thus the procedure is applied to the production term in the transport equation of K SGS , while the eddy viscosity in the filtered equation of motion is determined indirectly through K SGS . The statistically derived model for K SGS equation is adopted for the basis of our...

.... Phys. 0021-9991 10.1016/j.jcp.2003.11.031 , 197 , pp. 215 – 240 . Pierce , C. , and Moin , P. , 2004 , “ Progress-Variable Approach for Large-Eddy Simulation of Nonpremixed Turbulent Combustion ,” J. Fluid Mech. 0022-1120 10.1017/S0022112004008213 , 504 , pp. 73 – 97...

...Sharath S. Girimaji; Eunhwan Jeong; Ravi Srinivasan Hybrid/bridging models that combine the advantages of Reynolds averaged Navier Stokes (RANS) method and large-eddy simulations are being increasingly used for simulating turbulent flows with large-scale unsteadiness. The objective is to obtain...

...Sharath S. Girimaji A turbulence bridging method purported for any filter-width or scale resolution—fully averaged to completely resolved—is developed. The method is given the name partially averaged Navier-Stokes (PANS) method. In PANS, the model filter width (extent of partial averaging...

... and the spatial gradients of the flow field decrease in time. This late stage of Richtmyer-Meshkov mixing layers is studied from the viewpoint of self-similarity. Analogies with weakly anisotropic turbulence suggest that both the bubble-side and spike-side widths of the mixing layer should evolve as power-laws...

... is modeled based on scaling laws. The resulting generalized two-equation turbulence model is validated for several benchmark turbulent flows with swirl and curvature. Speziale , C. G. , 1991 , “ Analytical Methods for the Development of Reynolds Stress Closures in Turbulence ,” Annu. Rev. Fluid...