Friction lawsComputational fluid dynamicsPurpose The purpose of this paper is the numerical investigation of the friction laws for incompressible flow in undulated channels, with emphasis on the applicability of the hydraulic diameter concept. A focal point of the study is the derivation of correlation...
(1972) included transverse fluid injection at the wall and involved solutions for the mean velocity profile that presented linear (y), logarithmic (ln y) or bi-logarithmic (ln 2 y) terms. The studies discussed the effects of heat transfer, pressure gradients (favourable and adverse)...
In the 19th century, Osborne Reynolds sought to connect these states of flow with quantitative "laws of resistance," whereby the fluid friction is determined as a function of the Reynolds number. While he succeeded for laminar and turbulent flows, the laws for transitional flows eluded him and ...
Calculation of Variable Property Turbulent Friction and Heat Transfer in Rough Pipes A numerical calculation method for turbulent flow in rough pipes is developed. A mixing length model is used in the turbulent core while a roughness elemen... Wassel, A. T,Mills, A. F - 《Journal of Heat ...
A frictional drag emanates from friction between the fluid and the surfaces over which it flows. This friction is associated with the development of boundary layers, and scales with the Reynolds number. Pressure drag comes from the eddying motions that are set up in the fluid by the body's...
In turn, the relative entropy approach turns out be a very flexible to deal with different types of fluidmechanical systems if they come with a proper entropy structure. We exemplify the usage of the relative entropy approach on the high-friction limit for a (barotropic) Euler-Darcy system ...
workbench for applications where not only the physical domain of the fluid (3D) and the solid (1D) do not match, but also the characteristic mesh size of both of them is often substantially different (the fluid mesh requires a higher resolution to capture turbulent flow features, for example...
This result is then applied to the problem of heat transfer from a solid, isothermal sphere in Stokes flow, to yield the asymptotic expression for the ... Andreas,Acrivos,J.,... - 《Journal of Fluid Mechanics》 被引量: 59发表: 2006年 A theoretical analysis of non‐isothermal flow in ...
We examine the structure of near-wall turbulence in three-dimensional boundary layers (3DBLs), which we approximate by applying an impulsive spanwise motio... A Le,J Kim,C Gn. - 《International Journal of Heat & Fluid Flow》 被引量: 0发表: 2000年 Basic Laws in Mechanics of Turbulent F...
The averaged layered turbulent wall flows of an incompressible fluid are considered for an arbitrary wall roughness and a friction coefficient tending to zero. It is assumed that in the asymptotic limit the flow may be divided into two regions: an outer, only slightly disturbed region, and a ...