They were defined by george gabriel stokes in 1852, as a mathematically convenient alternative to the more common description of incoherent or partially polarized radiation in terms of its total intensity i, fractional degree of polarization p, and the shape parameters of the. The stokes parameters are a set of values that describe the polarization state of electromagnetic radiation. Derivation of the navierstokes equations wikipedia, the. The apllicatiuon range widely form the determination of electron charges to the physics of aerosols. The stokes model 41211 microvac pump is a selfcontained, rotary, oil sealed piston type unit. A modification of the straight fallingsphere viscometer is a rollingball viscometer, which times a ball rolling down a slope whilst immersed in the test fluid. Fluid dynamics and the navier stokes equations the navier stokes equations, developed by claudelouis navier and george gabriel stokes in 1822, are equations which can be used to determine the velocity vector eld that applies to a uid, given some initial conditions. So, using stokes theorem, we have changed the original problem into a new one. Um fator limitante na validade deste resultado e a dureza da esfera utilizada.
Mecanica dos fluidosviscosimetros por escoamento wikilivros. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on youtube. Ao longo deste cap tulo baseamonos principalmente nas referencias 1, 10. The piston is driven by an eccentric mounted on the drive shaft and the piston slided is guided by two floating hinge bars that are free to oscillate in the pump housing. Viscosidad instrumentacion industrial unexpo 2009i. One of the fundamental results in low reynolds hydrodynamics is the stokes solution for steady. Edwards, stokes, microvac 412h11, piston vacuum pump. Pdf viscosimetros isaias alvarez hernandez academia.
The navier stokes equation is a special case of the general continuity equation. Note that stokes flow is assumed, so the reynolds number must be small. Marcelo pisani gilmar dos santos machado 201120264 mirian dos santos benica 201210941 ueslei murilo mota santos 201120282 ilheus bahia maio 20. It, and associated equations such as mass continuity, may be derived from.
334 1533 493 467 194 613 1462 1203 484 1104 351 459 1648 557 538 655 1421 1190 277 71 96 1044 26 1520 1548 912 1466 1240 198 68 1324 845 306 173 819 421 497