An Approach to Quick Determination of Some Water Transmission Characteristics of Porous Media

Modelling the effect of pore structure and wetting angles on capillary rise in soils having different wettabilities

“…The bottom of the column was covered by means of highly permeable textile. Subsequently, the standard capillary rise procedure was applied to follow the kinetics of wetting front in vertical column of glass bead or soil (Malik et al, 1984). It is worth mentioning that the wetting front during the capillary rise process was not flat and its shape became more and more irregular.…”

“…In the case of grain porous materials like soil the indirect dynamic method of CA measurement is frequently applied (Letey et al, 1962;Malik et al, 1984;Scott, 2000;Waniek et al, 2000). Its theoretical background is laid down by Hagen-Pouaseille's and Young-Laplace laws, which describe the viscous liquid movement and the meniscus pressure in pores.…”

Rapid Migration of Radionuclides Leaked from High-Level Water Tanks; A Study of Salinity Gradients, Wetted Path Geometry and Water Vapor Transport

“…The capillary wetting technique commonly used in the characterization of solid particle surfaces (Malik et al, 1984) was employed with some modifications as described below. The sample container was constructed from a plastic 60-mL syringe barrel trimmed at both ends to create a straight open tube (35 mm i.d., 135 mm long) fitted with a nylon disk (600 cm bubbling pressure) at the lower end, connected to a Mariotte Bottle.…”

Flow behavior of industrial effluents in soils with different textures

“…The penetration coefficient X represents the advance of the visible wetting front per square root of time through an air dry soil with a mill hydrostatic head for horizontal infiltration. It was analyzed by Malik et al (1984) for water and found to be: X = (4 a r cos a)VyGti The ratio of the slope over the intercept k in fact defines Z* in terms of the Laptase expression for pressure difference at the interface: a _ = (2 <r cos ct) pgr = Z* [5] IS.…”

“…The applicability of Poiseuille's law for horizontal infiltration has been verified experimentally in a single capillary tube (Bell and Cameron, 1906;Malik et al, 1979a) and in porous media (Green and Ampt, 1911;Malik et al, 1979b) in terms of the penetration coefficient X. This approach for quick capillary rise (QCR) has already been studied by many other workers (Swartzendruber, 1956;Malik et al, 1984;Kumar and Malik, 1990). This paper used a short time capillary rise (<2 hr) to estimate the pore geometrical parameters and effluent transmission properties of soils.…”