English-French-Persian

Number of Results: 3 Search : Reynolds number

large Reynolds number flow tacân bâ adad-e bozorg-e Reynolds Fr.: écoulement à grand nombre de Reynolds A turbulent flow in which viscous forces are negligible compared to nonlinear advection terms, which characterize the variation of fluid quantities. The dynamics becomes generally turbulent when the Reynolds number is high enough. However, the critical Reynolds number for that is not universal, and depends in particular on boundary conditions. → |

magnetic Reynolds number adad-e Reynolds-e meqnâtisi Fr.: nombre de Reynolds magnétique A → conductivity of the fluid,
μ_{0} is the → magnetic permeability
of the fluid, L is he characteristic length scale of the fluid flow, and
U the characteristic velocity of the flow.
A typical value for the Earth is _{0}R ~ 200._{m}→ |

Reynolds number adad-e Reynolds (#) Fr.: nombre de Reynolds A dimensionless quantity that governs the conditions for hydrodynamic stability and the
occurrence of turbulence in fluids.
It is defined by the ratio, μ u / L), i.e.
R = L u ρ/μ, where L is a typical dimension of
the system, u is a measure of the velocities that prevail, ρ the density,
and μ the kinematic viscosity.
At low Reynolds numbers the flow is steady, since the viscous forces are
predominant in controlling the flow.
At a critical value of
R, corresponding to a critical velocity, the flow becomes turbulent.Named after Osborne Reynolds (1842-1912), a British physicist who pioneered
the study of turbulent flows; → |