Stokes Number Effects on Deposition in Particle‐Laden Turbulent Pipe Flows

Reynolds-number-dependent turbulent inertia and onset of log region in pipe flows

A detailed analysis of the ‘turbulent inertia’ (TI) term (the wall-normal gradient of the Reynolds shear stress, d〈−uv〉/dy), in the axial mean momentum equation is presented for turbulent pipe flows at friction Reynolds numbers δ+ ≈ 500, 1000 and 2000 using direct numerical simulation. Two different decompositions for TI are employed to further understand the mean structure of wall turbulence. ...

Stochastic Navier-Stokes Equations for Turbulent Flows

This paper concerns the fluid dynamics modelled by the stochastic flow    η̇ (t, x) = u (t,η (t, x)) + σ (t,η (t, x)) ◦ Ẇ η(0, x) = x where the turbulent term is driven by the white noise Ẇ . The motivation for this setting is to understand the motion of fluid parcels in turbulent and randomly forced fluid flows. Stochastic Euler equations for the undetermined components u(t, x) and σ(t, x) o...

A New Model for Prediction of Heat Eddy Diffusivity in Pipe Expansion Turbulent Flows

A new model to calculate heat eddy diffusivity in separating and reattaching flows based on modification of constant Prt is proposed. This modification is made using an empirical correlation between maximum Nusselt number and entrance Reynolds number. The model includes both the simplicity of Prt=0.9 assumption and the accuracy of two-equation heat-transfer models. Furthermore, an appropriate l...

effect of sub-grid scales on large eddy simulation of particle deposition in a turbulent channel flow

چکیده ندارد.

A multi-Gaussian quadrature method of moments for simulating high Stokes number turbulent two-phase flows