  In this article we derive expressions for Casimir-like pressures induced by
nonequilibrium concentration fluctuations in liquid mixtures. The results are
then applied to liquid mixtures in which the concentration gradient results
from a temperature gradient through the Soret effect. A comparison is made
between the pressures induced by nonequilibrium concentration fluctuations in
liquid mixtures and those induced by nonequilibrium temperature fluctuations in
one-component fluids. Some suggestions for experimental verification procedures
are also presented.
