wall-bounded flows
Stochastically generated turbulence for wall bounded flows
... The quality of stochastically generated turbulence by the combined method of Mesbah is studied for wall bounded flows. There are a number of novel aspects to this work. Firstly, Mesbah [15] has not ...
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Transition to turbulence in wall-bounded flows: Where do we stand?
... to appear in Mechanical Engineering Review, Vol. 3, No. 2, July 1st, 2016. Abstract In this essay, we recall the specificities of the transition to turbulence in wall-bounded flows and present recent ...
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Efficient wall modeling for large eddy simulations of general non-equilibrium wall-bounded flows
... for wall-bounded flows, ranging from simple equilibrium boundary layers to the most complex conditions with strong pressure gradients and flow ...of wall modeling compared to explicitly ...
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Uncertainty quantification of turbulence model closure coefficients for transonic wall-bounded flows
... to quantify the uncertainty and sensitivity of commonly used turbulence models in Reynolds-Averaged Navier-Stokes (RANS) codes due to uncertainty in the values of closure coefficients for transonic, ...
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On linking the filter width to the boundary layer thickness in explicitly filtered large eddy simulations of wall bounded flows
... simple flows and the explicit filter width has been selected based on a priori ...complex wall bounded ...these wall bounded flows was initially set at 20% of a characteristic ...
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Nonlinear dynamics in transitional wall-bounded flows
... The minimal seed, i.e. the point on the edge closest to the laminar attractor, in Blasius has been identified. In order to trigger subcritical transition, the minimal seed experiences a sequence of linear mechanisms. The ...
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Persistence of local anisotropy of passive scalars in wall-bounded flows
... a wall-bounded flow with mean velocity gradients there exists a persistent small-scale anisotropy of a passive scalar ...any flows with constant mean velocity gradients will invariably exhibit ...
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Comprehensive characterisation of turbulence dynamics with emphasis on wall-bounded flows
... Turbulence has a complex character with many different facets, there are countless differ- ent point of views to study its varieties. For over a century scientists have been engaged with improving our understanding of ...
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Transport of Heat and Momentum In Non-Equilibrium Wall-Bounded Flows
... and wall functions ...and wall functions are directed, refined, and validated by experimental ...complex flows typical of engineered ...and wall functions are generally based on data from ...
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Optimization of Turbulent Prandtl Number in Turbulent, Wall Bounded Flows
... non-canonical flows, at equilibrium or not, with an uncertainty expanding with increasing departure from equilibrium and/or canonical boundary ...canonical flows has been a long standing focus of turbulence ...
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A pencil distributed finite difference code for strongly turbulent wall-bounded flows
... The performance of this code allows simulation of flows at high driving. For the application to Rayleigh–Bénard convection, we refer to Fig. 6a, where the heat flux Nu as a function of the driving Ra can be seen. In this ...
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Active and passive in-plane wall fluctuations in turbulent channel flows
... utilises wall motions in the same direction as the near-wall streamwise velocity fluctuations, and also provides drag reduction in wall shear stress increasing and decreasing ...streamwise ...
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Wall y Strategy for Dealing with Wall-bounded Turbulent Flows
... Turbulent flows are significantly affected by the presence of walls, where the viscosity-affected regions have large gradients in the solution variables and accurate presentation of the near- wall region ...
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A vortex method for wall bounded turbulent flows
... near wall region while the vorticity in the remainder of the ow is contained in convecting and stretching vortex ...their wall-normal viscous diusion and vortex stretching using nite ...
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Pressure signature in adverse-pressure-gradient wall bounded turbulent flows
... In adverse pressure gradient flows, static pressure increases in the flow direction,.. in comparison with zero and favorable pressure gradient flows, where 5P/dx = 0 and.[r] ...
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Extended integral wall-model for large-eddy simulations of compressible wall-bounded turbulent flows
... numerical wall-models solve a set of differential equations usually based on the thin boundary layer equation approximation under the RANS formalism on an implicit or separated 30 grid between the wall and ...
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Numerical Simulation and Subgrid Scale Modeling of Mixing and Wall Bounded Turbulent Flows
... and Wall Modeling of Wall-Bounded Turbulence An LES wall model based on SGS stretched vortices was developed in chapter ...virtual wall that lies within the overlap ...and ...
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Modulation of wall-bounded turbulent flows by large particles : effect of concentration, inertia, and shape
... Couette flow with 1 < St < 4(4 < d + < 8) reported in Wang et al. (2017) were similar to those obtained in the present paper at St ≈ 1(d + ≈ 4). 3. Particle effect on the transition A theoretical analysis of flow ...
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Shear-improved Smagorinsky model for large-eddy simulation of wall-bounded turbulent flows
... A shear-improved Smagorinsky model is introduced based on results concerning mean-shear effects in wall-bounded turbulence. The Smagorinsky eddy-viscosity is modified as ν T = (C s ∆) 2 ( | S |−|# S $| ): ...
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Wall Flows and their Applications
... For exhausting and transport of light materials, as for instance short fibers, hot air, fume, etc., the system based on the so-called wall effect can be used [9], etc. The principle is given in Fig. 3.1-1 – the ...
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