turbulent velocity field
11Fluid mechanics — Continuum mechanics …
12Hydraulic jump — A hydraulic jump is a phenomenon in the science of hydraulics which is frequently observed in open channel flow such as rivers and spillways. When liquid at high velocity discharges into a zone of lower velocity, a rather abrupt rise (a step or… …
13Bohm diffusion — is the diffusion of plasma across a magnetic field with a diffusion coefficient equal to:D {Bohm} = frac{1}{16},frac{k BT}{eB},where B is the magnetic field strength, T is the temperature, and e is the elementary charge.It was first observed in… …
14Turbulence modeling — is the area of physical modeling where a simpler mathematical model than the full time dependent Navier Stokes Equations is used to predict the effects of turbulence.There are various mathematical models used in flow modelling to understand… …
15Reynolds-averaged Navier–Stokes equations — The Reynolds averaged Navier–Stokes (RANS) equations are time averaged [The true time average ( ar{X} ) of a variable ( x ) is defined by: ar{X} = lim {T o infty}frac{1}{T}int {t 0}^{t 0+T} x, dt. For this to be a well defined term, the limit ( …
16Orr–Sommerfeld equation — The Orr–Sommerfeld equation, in fluid dynamics, is an eigenvalue equation describing the linear two dimensional modes of disturbance to a viscous parallel flow. The solution to the Navier–Stokes equations for a parallel, laminar flow can become… …
17Enstrophy — In fluid dynamics, the enstrophy mathcal{E} can be described as the integral of the square of the vorticity eta given a velocity field mathbf{u} as,: mathcal{E}(mathbf{u}) =frac{1}{2} int {S} eta^{2}dS. Here, since the curl gives a vector field… …
18Diffusion — This article is about the generic concept of the time dependent random process. For other uses, see Diffusion (disambiguation). Diffusion describes the spread of particles through random motion from regions of higher concentration to regions of… …
19Robert Kraichnan — (1928 2008) was an American theoretical physicist who made seminal contributions to the theory of turbulence [ [http://www.nytimes.com/2008/03/08/us/08kraichnan.html?ref=obituaries Robert Kraichnan, Physicist Who Studied Turbulence, Is Dead at 80 …
20Detached eddy simulation — (DES) is a modification of a RANS model in which the model switches to a subgrid scale formulation in regions fine enough for LES calculations. Regions near solid boundaries and where the turbulent length scale is less than the maximum grid… …
