Results 221 to 230 of about 7,999 (257)

Reply to “Comment on ‘Dynamics of wetting fronts in porous media’ ”

Physical Review E, 2000
In our work [Phys. Rev. E 58, R5245 (1998)] we introduced a dynamic phenomenological approach to model propagation of localized wetting fronts in porous media. Gray and Miller in their Comment [Phys. Rev. E 61, 2150 (2000)] criticize our approach on several issues. The main criticism addresses the problem of mass conservation in our model.
, Mitkov, , Tartakovsky, , Larrabee Winter C   +2 more
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A probe for measuring wetting front migration in rocks

Water Resources Research, 2000
To facilitate investigations of flow dynamics in unsaturated fractured rocks, we have designed a probe to qualitatively monitor saturation changes in borehole environments. This flexible probe is able to fit the cylindrical shape of boreholes and requires no backfill.
Rohit Salve, Joseph S. Y. Wang, Tetsu K. Tokunaga   +2 more
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Wetting Front Analysis of the Nonlinear Diffusion Equation

Water Resources Research, 1984
A perturbation procedure for the solution of the nonlinear diffusion equation is presented, which yields water content as a function of the distance to the wetting front. The result is in agreement with earlier predictions of wetting front position and sorptivity using an optimal technique.
J.‐Y. Parlange, I. G. Lisle, S. N. Prasad, M. J. M. Römkens   +3 more
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Wetting front instability in randomly stratified soils

Physics of Fluids, 1996
A probabilistic criterion is derived for the onset of wetting front instability during surface water infiltration into a randomly stratified soil. It is based on the common assumption that the natural log hydraulic conductivity of the soil is a random, multivariate Gaussian function of space.
Chen, Guoliang, Neuman, Shlomo P.
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Atomic observations at the reactive wetting front on SiC

Philosophical Magazine A, 1999
Abstract Reactive wetting of a Ag-Cu-Ti molten alloy on a SiC substrate was observed in situ using a high-resolution transmission electron microscope. SiC dissolution and TiC nucleation and growth were repeated at the spreading front. The formation process of the interface between SiC and TiC was classified into two types depending on the nucleation ...
C. Iwamoto, H. Ichinose, S. I. Tanaka
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Nanoscale Dynamics at Reactive Wetting Front on SiC

Materials Science Forum, 2005
Nanoscale singularity at the reactive wetting front on SiC (0006) was studied using video recorded in situ to clarify the dynamic atomistic behaviours of the brazing and the molten tip spreading on a high-temperature stage of a high-resolution transmission electron microscope. An atomistic process controls the wetting at the front of the spreading film
Shun Ichiro Tanaka, Chihiro Iwamoto
openaire   +1 more source

Defects in wetting fronts: Experimental and theoretical results

Physical Review E, 1998
We study flow in a porous medium in the presence of a discontinuous perturbation (defect) that perturbs its parameters. The discontinuous perturbation is at the interface between regions of different porosities, produced in the experiment by uniformly depositing black toner with a laser printer.
O. Zik, T. Kustanovich, E. Moses, Z. Olami   +3 more
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Wetting front evolution in randomly heterogeneous soils

2002
Philip [1975] was the first to investigate the stability of a wetting front in a stratified soil using rigorous hydrodynamic arguments. He based his analysis on the Green and Ampt [1911] model and treated permeability as a known function of depth. We adopt the same model to develop integro-differential equations for leading statistical moments of ...
Alexandre M. Tartakovsky, Shlomo P. Neuman, Daniel M. Tartakovsky   +2 more
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Experimental observations on wetting and infiltration fronts in metals

Scripta Metallurgica, 1988
Analyse par microscopie electronique a balayage de la region de contact entre un metal liquide et un metal solide dans les systemes: Cu-Sn, Fe-Sn, Cu-Zn et Fe-Cu.
J-H. Ahn, N. Terao, A. Berghezan
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Optimal Prediction of Saturation and Wetting Fronts during Trickle Irrigation

Soil Science Society of America Journal, 1984
Abstract The nonlinear diffusion equation in spherical geometry describes water movement from a point source into a porous medium. This situation occurs, for example, in the early stages of trickle irrigation. Prediction of the saturation and wetting front positions during irrigation is of obvious practical importance.
Lockington, D., Parlange, J. Y., Surin, A.   +2 more
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