Jamin effect

Jamin effect

[jə′mēn i‚fekt]
(fluid mechanics)
Resistance to flow of a column of liquid divided by air bubbles in a capillary tube, even when subjected to a substantial pressure difference between the ends of the tube.
References in periodicals archive ?
Jamin effect manifests in porous medium as a result of the radii inequality of the meniscus curvature and it creates additional resistances to movement in the pore volume.
All ways of motion of the investigated fluid model were in thermobath The constant temperature was maintained by ultratermostat provided with contact thermometer that was fixed directly intermobath The crack saturation by the investigated fluid under slight pressure with simultaneous vacuuming was made for exception of Jamin effect's.
Keywords: microcrack opening, anomalous water, Jamin effect, limiting yield stress, apparent viscosity.
Jamin effect is origin of the additional backpressure in the porous medium due to the fact that the pore channel presents capillaries structure of the variable radius and forms.
The obtained microcracked effect for homogeneous fluid purified from air or gas is an analog of Jamin effect and it is called as microcracked fluid effect.