We have studied the combined imbibition and evaporation of surfactant solutions into thin porous media by means experiments numerical simulations. Solutions anionic non-ionic surfactants were deposited onto moving sheets paper a droplet-on-demand inkjet system. Optical transmission imaging infrared thermography used to monitor their lateral transport evaporation. Moreover, we propose theoretica...

This article investigates the use micro-capsules, containing a gelling agent hydroxypropyl cellulose (HPC), to alter flow paths in porous media. The aim is to preferentially block-off high permeability regions, thereby diverting the flow into adjacent un-swept low permeability regions. Micro-capsules with 2 – 7 μm in diameter, were made by polymer precipitation through solvent evaporation using...

While studying the mode of encysting shown by large forms of the unicellular animal of the genus Stentor (500 1000 microns) we were able to consistently demonstrate the appearance of dwarf forms, not previously described, which arose from nuclei released from the disrupted larger cells. These larger cells had encysted in an unfavorable environment due to evaporation to a dry state.When sterile ...

The concept of immiscible displacement as an invasion percolation (IP) process driven by heat and mass transfer is used in a pore network model for convective drying of capillary porous media. The coupling between heat and mass transfer occurs at the liquid-gas interface through temperature dependent equilibrium vapour pressure, surface tension and phase change enthalpy (in evaporation and cond...

evaporation of micro-liter drops from solid surfaces at room condition is mainly governed by diffusion. therefore, there should be no difference between evaporation rate of sessile and pendant drops. however, some studies indicate a difference and explain the difference using buoyancy. the objective here is to reconcile the inconsistency in the literature. for that, first, by comparing two iden...

Diffusion equations with degenerate nonlinear source terms arise in many different applications, e.g., in the theory of epidemics, in models of cortical spreading depression, and in models of evaporation and condensation in porous media. In this paper, we consider a generalization of these models to a system of n coupled diffusion equations with identical nonlinear source terms. We determine si...

The hanging drop tissue culture is a technique utilized in embryology [4] and other fields to allow growth that would otherwise be restricted by the flat plane of culture dishes and also to minimize the surface area to volume ratio, slowing evaporation. The classic hanging drop culture is a small drop of liquid, such as plasma or some other media allowing tissue growth, suspended from an invert...

Capillary forces arising during the evaporation of liquids from dense carbon nanotube arrays are used to reassemble the nanotubes into two-dimensional contiguous cellular foams. The stable nanotube foams can be elastically deformed, transferred to other substrates, or floated out to produce free-standing macroscopic fabrics. The lightweight cellular foams made of condensed nanotubes could have ...

The interchange of gas components and volatile compounds between terrestrial atmospheric compartments is critical for biogeochemical cycles has important environmental climate implications. In this study, we focus on oxygen explore the coupling mass transfer evaporation at soil/atmosphere interface. We performed well-controlled single-phase two-phase laboratory experiments to determine spatial ...

The paper 1 contains results of investigation of the structure and some properties of copper and molybdenum based composite materials and the processing parameters in their production via electron-beam evaporation/condensation. The present work has been done in connection with the necessity of improvement and repeatability of the properties of condensed molybdenum-copper materials, which partic...