porous pipe

porous pipe

A pipe that allows liquid or gas to ooze through its walls; can be used as a subsoil drain.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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Ohki [2] discussed the laminar incompressible flow in a semi-infinite porous pipe with expanding and contracting radius in axial direction.
They cover determining the velocity field by conformal mapping methods, calculating flat potential flows by the boundary integral equation method, calculating vortex flows, the behavior of dust particles in the suction range, specific features of air ejected in a perforated duct with a bypass chamber, air ejection in a porous pipe with linear cross-flow pattern, specific features of air ejection in the elevator handling of grain, and measures for reducing aspiration volumes in the elevator handling of grain.
Makinde, "Extending the utility of perturbation series in problems of laminar flow in a porous pipe and a diverging channel," Australian Mathematical Society B.
To water the vegetable garden and new flowerbeds you can't beat Porous Pipe, which works by weeping out water along its length.
- For recently planted areas, try a porous pipe, made from reconstituted car tyres.
To examine the effect of eliminating moisture transmission through the porous pipe materials, the surfaces of one set of VC and FRC pipes were coated with a two-part epoxy resin (40% diluted with solvent; Intergard Ez, Epoxy, En-cap Ac Sealer 4:1).
It comprises 30m of porous pipe, a tap hose connector and a kit of unions and end fittings.
Add to these a choice of misters and mini-sprinklers and the option of perforated or porous pipe, and you have great latitude in design.
USE porous pipe, seep-hose or leaky-pipe buried just beneath the soil surface to keep newly-planted trees and shrubs moist at all times.
SEEPHOSES: Buy a specially-made porous pipe or make holes in an old hosepipe, attach to your tap or a water butt and lay in the soil.
Add to these a choice of misters and sprinklers and the option of perforated or porous pipe, and you have great latitude in design.