advection pahnbaz Fr.: advection 1) Geology: The process of transport of a quantity by the velocity
field due to the movement of a fluid. Advection differs from
→ convection, which describes thermally driven
circulation. From L. advecti "act of conveying," from advectus, past participle of advehere "to carry," from ad-, "to" + vehere "to carry, bring;" Skt. vah-, vahati "to carry, conduct, guide," Av. vaz-, vazaiti "to guide, lead"; PIE *wegh- "to go, transport in a vehicle". Pahnbaz from pahn "flat, wide, → broad," + baz "to carry," → evection. |
advection term tarm-e pahnbaz Fr.: terme d'advection The first term on the right side in the → induction equation. |
magnetic advection pahnbaz-e meqnâtisi Fr.: advection magnétique The transport of the magnetic field by a fluid. It is given by the term ∇ x (v x B) in the → induction equation. |