Abstract Purpose There is strong experimental evidence that root systems substantially change the hydraulic properties of soil. However, mechanisms by which they do this remain largely unknown. In work, we made hypothesis a preferential flow soil moisture occurs in directions follow orientation and distribution roots within soil, phenomenon alters patterns. Methods We modified Richards’ equatio...

Preferential flow has an important role as it strongly influences solute transport in forest soil. The quick passage of water and solutes through preferential paths without soil absorption results considerable loss groundwater pollution. However, under different infiltration volumes southwestern China remain unclear. Three plots, named P20, P40 P60, were subjected to precipitation amounts 20, 4...

There is a limited understanding of solute transport properties of degraded peat soils as compared to mineral substrates. A lower organic matter (OM) content is often the result of peat degradation and mineralization following artificial drainage. In this study, we aimed at deducing changes in solute transport properties of peat soils differing in OM content. Miscible displacement experiments w...

The abnormalities of pulmonary arterial blood supply in mitral stenosis, consisting primarily of constriction of lower lobe vessels with resultant upper lobe preferential flow, was assessed by means of pulmonary angiography in 30 patients with mitral stenosis uncomplicated by other cardiac diseases. The abnormalities in blood flow correlated best with both the pulmonay artery pressure and the p...

Under resting conditions, the failing heart shifts fuel use toward greater glucose and lower free fatty acid (FFA) oxidation. We hypothesized that chronic metabolic abnormalities in patients with dilated cardiomyopathy (DCM) are associated with the absence of the normal increase in myocardial glucose uptake and maintenance of cardiac mechanical efficiency in response to pacing stress. In 10 DCM...

We present the outcomes of studies into the behaviour of biologically induced mineralisation (BIM) of calcium carbonate for the purposes of contaminant sequestration and soil stabilisation. The implementation of BIM requires treatment of soil/aquifer material in situ through introduction of chemical precursors and potentially bacteria. However, natural subsurface heterogeneity causes preferenti...

Holographic PIV is used to measure the three-dimensional velocity distribution of fully developed turbulent flow within a square duct at ReH = 1.2 × 10. The data is used for mapping the structure of the filtered, three-dimensional vorticity, strain-rate and subgrid-scale (SGS) stress tensor distributions. Visualizations of iso-vorticity surfaces show structures that are only slightly elongated,...

Transport of liquids by pervaporation takes place by a solution-diffusion mechanism. In order to investigate the “solution part” of this transport model, preferential sorption has been compared with preferential permeability. Sorption equilibria and pervaporation experiments for the systems water-ethanol-cellulose acetate, water-ethanol-polyacrylonitrile and water-ethanol-polysulfone have been ...

In consideration of vertical formation heterogeneity, a basic nonlinear model 1D commingled preferential Darcian flow and non-Darcian with the threshold pressure gradient (TPG) in dual-layered is presented. Non-Darcian TPG happens low-permeability tight layer, kinematic equation holds other high-permeability layer. The similarity transformation method applied to analytically solve model. Moreov...