[PDF] Top 20 Direct numerical simulation of a decelerated wall bounded turbulent shear flow

... free shear flow, free of no-slip ...very-near- wall turbulence will also be relevant to the boundary layer, provided the magnitude of the wall shear remains much larger than the applied rate of ... See full document

... Although numerical methods based on DNS offer the necessary high fidelity, they impose strict spatial resolution constraints that lead to very high computational ...Eddy Simulation (LES) methods are more ... See full document

... BFS flow with symmetric (double) expansion and look at peri- odic time oscillations of the recirculation length Durst et ...laminar flow through a channel with double ...and turbulent flow ... See full document

... The results show that temperature and velocity, as well as concentration, are strongly influenced by the Stokes number with respect to the Reynolds number. In the near wall region, the particle is transported ... See full document

... swirling flow in the straight pipe has been investigated since ...swirling flow through a straight pipe for wide range of Reynold ...enhanced wall treatment available in commercial available tool ... See full document

... the wall, a smooth boundary was assumed by specifying a roughness height of ...two turbulent closure schemes, the computational mesh as well as initial and boundary conditions for the two simulations, each ... See full document

... a turbulent flow has been studied mostly, on one hand due to its simplicity without buoyancy effects or sedimentation, on the other hand because of the universality of turbulent flow in nature ... See full document

... the flow to develop. Flow oscillations downstream of the bend are measured using several methods, and the corresponding oscillation frequencies are ...pipe wall and half-sided mass flow rate ... See full document

... the whole ramp region. However, for the inner layer, the Reynolds stresses are reduced sharply near EC, and then begin to increase almost immediately after EC. Therefore, the differences between the inner and the outer ... See full document

... Direct numerical simulation of the incompressible Navier–Stokes equations is used to study flows where laminar boundary-layer separation is followed by turbulent reattachment forming a closed ... See full document

... 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 ...the numerical ... See full document

... were more than two orders of magnitude lower than the maximum rms  uctuations occurring in the wake. Lengths of 8.5 on the upper side and 7.5 on the lower side in the wall-normal y directionare used, whereas the ... See full document

... buoyancy-driven turbulent mixing is the Rayleigh– Taylor instability ...growing turbulent mixing ...evolving flow, requiring expensive computational resources ...the turbulent mixing zone, ... See full document

... identical bounded condition such as squ- are or circular ...channel flow are ...the flow in detail and obtained lots of important consequence ...the numerical process to simulate the ... See full document

... of turbulent kinetic energy produced by a mean velocity gradient, with respect to the purely solenoidal ...and numerical (Sandham & Reynolds 1991; Vreman, Sandham & Luo 1996) studies of mixing ... See full document

... The wall surface flow pattern in the lateral direction is visualized by skin friction lines as seen in ...the flow circulates around the hill, and converges into a counter- rotating vortex pair ... See full document

... feedback flow control. In numerical simulation used for weather fo- recasting, the initial condition is updated at time intervals based on past computational results and measurement data around the ... See full document

... Structure of turbulent flow at a river confluence with momentum and velocity ratios close to 1: Insight provided by an eddyresolving numerical simulation.. Figure is reproduced by permis[r] ... See full document

... RC shear wall structures under lateral loading requires analytical models capable of reproducing the nonlinear response of each structural component with reasonable accuracy and simple enough to allow ... See full document

... of turbulent research. Both active (intervening in a turbulent flow based on a trigger event) and passive (modification of boundaries such as use of compliant surfaces or riblets; or use of ... See full document