Surface Tension and Fine Particles

Effects of surface anisotropy on hysteresis in fine magnetic particles.

We solve numerically the dissipative Landau-LifshitzGilbert equations to consider hysteresis in fine magnetic particles. Finite size effects are studied for two models with uniaxial anisotropy — bulk random axis and surface anisotropy only. It is demonstrated that the latter model introduces considerable effects for small enough particles when the coupling to the anisotropy is equal or greater ...

Fine particles and mortality.

In an interesting paper in a recent issue (vol 17, issue 14) of the journal, Enstrom examined the association between fine particulate matter (PM) pollution and mortality in a cohort of elderly Californians. The analyses used proportional hazards regression and after adjusting for age, sex, cigarette smoking, and other potential confounders, Enstrom concluded, “These epidemiologic results do no...

Fine particles and lung cancer.

A lmost five decades have elapsed since the effect of the so-called ‘‘urban factor’’ on lung cancer has been suggested. Air pollution has always been an attractive explanation for the 10–40% increase in lung cancer mortality observed in urban versus rural areas, but confounding from smoking and other factors has been a great limitation in interpreting geographical comparisons. Several attempts ...

Prediction of Surface Tension in Single and Mixed Electrolyte Solutions

MODELING SURFACE TENSION AND WALL ADHESION IN MOLD FILLING PROCESS

Abstract: In this study an algorithm for mold-filling simulation with consideration of surface tension has been developed based on a SOLA VOF scheme. As the governing equations, the Navier-Stokes equations for incompressible and laminar flows were used. We proposed a way of considering surface tension in mold-filling simulation. The proposed scheme for surface tension was based on the conti...