General Characteristics For Large and Small
For, advection is relatively unimportant, and so the magnetic field will tend to relax towards a purely diffusive state, determined by the boundary conditions rather than the flow.
For, diffusion is relatively unimportant on the length scale . Flux lines of the magnetic field are then advected with the fluid flow, until such time as gradients are concentrated into regions of short enough length scale that diffusion can balance advection.
Read more about this topic: Magnetic Reynolds Number
Famous quotes containing the words general, large and/or small:
“It has been an unchallengeable American doctrine that cranberry sauce, a pink goo with overtones of sugared tomatoes, is a delectable necessity of the Thanksgiving board and that turkey is uneatable without it.... There are some things in every country that you must be born to endure; and another hundred years of general satisfaction with Americans and America could not reconcile this expatriate to cranberry sauce, peanut butter, and drum majorettes.”
—Alistair Cooke (b. 1908)
“It is surprising on stepping ashore anywhere into this unbroken wilderness to see so often, at least within a few rods of the river, the marks of an axe, made by lumberers who have either camped here or driven logs past in previous springs. You will see perchance where, going on the same errand that you do, they have cut large chips from a tall white pine stump for their fire.”
—Henry David Thoreau (1817–1862)
“Many great actions are committed in small struggles.”
—Victor Hugo (1802–1885)