Based on the flow visualization experiment, the quasi-equilibrium capillary effect
is limited, i.e., the dynamic effects on contact angle can be neglected, as the modified capillary number is about O([10.sup.-4]).
(2) the wet zone appears on the cold side of the medium and the front of condensation extends from this position towards the open side by capillary effects
It is, therefore, the main objective of this work to study in a comprehensive way the capillary flow of an LDPE melt both experimentally and numerically by considering all possible capillary effects
, combined and separately.
Seventeen chapters cover basic concepts, governing equations, basic flow solutions, hydraulic resistance and compliance, diffusion, time-dependent flow, capillary effects
, electrohydrodynamics, electroosmosis, dielectrophoresis, magnetophoresis, thermal transfer, two-phase flow, complex flow patterns, acoustofluidics, optofluidics, and nanofluidics.
Jun Zeng of Coventor, Cambridge, Mass., and other researchers recently used computational fluid dynamics (CFD) to simulate a microfluidic valve utilizing capillary effects
. The simulation results showed excellent correlation with experimental results.
Besides pure academic interest, understanding and description of the capillary effects
has practical applications in a variety of fields including membrane technology, bioengineering, environmental control, etc.