دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the velocity at the transitional point between laminar and turbulent fluid flow. See laminar flow, turbulent fluid flow. critical volume n: the specific volume of gas at its critical temperature and pressure.

n: The flow velocity that the flow condition of fluid changes from flowing sheet of water to turbulent flow.

n: a kind of inertial regime ,it is defined relatively with the peakedness inertial

n: the flow pattern is classified three kinds：laminar flow，turbulent flow and excessive flow according to hydraulics principle

n: a smooth flow of fluid in which no turbulence or cross flow of fluid particles occurs between adjacent stream lines. See also Reynolds number.

n: fluid elements flowing along fixed streamlines which are parallel to the walls of the channel of flow. In laminar flow, the fluid moves in plates or sections with a differential velocity across the frontwhich varies from zero at the wall to a maximum towa

fluid flowing at a lower rate with elements of the fluid flowing in fixed streamlines. Laminar friction is a function of NRe (Reynolds number). For laminar flow, the Fanning fracition factor = 16/NRe.

the Darcy equation describing linear movement of fluids in laminar flow through a porous media.

a flow regime departing from the laminar flow region where Darcy flow is measurable. Generally turbulence.

n: see laminar flow.

in the example or laminar flow for Newtonian fluids, the volume flow rate is given by the pressure differential (inlet to outlet) divided by the viscous resistance. This resistance depends on fluid viscosity and the length but is dominated by dependence o

the Darcy equation describing radial movement of fluids in laminar flow through a porous media.

n: a dimensionless number defined as Re =ruD/m Where D = inside diameter of the pipe u = mean flow velocity r = density of the fluid m= dynamic viscosity, all in consistent units.

n: A demensionless number,which be used to judge the flowing condition of the fluid .Its code is Re.



an experimental number used in fluid flow to predict the flow velocity at which the flow regime moves from laminar flow through a transition range and into turbulent flow. It is the dimensionless ratio of inertial forces to viscous forces in flowing fluid