| 摘要 |
A method and an arrangement for transferring a small volume of fluid along a boundary layer between two tightly contacting elongated bodies (1, 2) from a first end to a second end of said tightly contacting bodies, where at least one of the bodies is made of a giant magnetostrictive material. According to the invention a narrow transversal end section of the magnetostrictive body (1) is exposed to a magnetic field causing a transversal contraction and a longitudinal expansion of the end section thus forming a cavity (9) at one end of the boundary layer. Fluid (5) from a reservoir (4) is replenished into the initially formed cavity induced by the magnetic field at the first end of the bodies, after which the magnetic field is transferred along the bodies towards their second end while conveying said cavity (9) and the fluid contained therein and emitting the fluid (5) at the second end of the bodies. By controlling the strength of the magnetic field initially and during transfer, could dosing and pressurising of the fluid be obtained. |
