4 research outputs found
Hydrodynamics of Two Interacting Liquid Droplets of Aqueous Solution inside a Microchannel
We experimentally
investigated the effect of a neighboring liquid
droplet on fluid convection inside a liquid droplet of aqueous solution
present inside a microchannel using the microscale particle image
velocimetry technique. There is no physical contact between the two
droplets, and the solute concentrations of the two droplets are set
at different values. Vapor concentration near the interface of the
two droplets is different due to the difference in solute concentration.
Water vapor evaporates from the low-concentration droplet having higher
vapor pressure and condenses on the high-concentration droplet having
lower vapor pressure. Evaporation and condensation induce Rayleigh
convection inside the two droplets. Flow pattern shows circulating
loops inside both liquid droplets. The circulations at the interacting
adjacent interface of the two droplets are opposite to each other.
The strength of flow inside the liquid droplets decreases with time
due to decrease in the difference of solute concentration between
the two droplets. The flow strength inside the two interacting droplets
is also a function of separation distance between the droplets. The
flow strength inside the droplets decreases with increase in separation
distance
Hydrodynamics of Two Interacting Liquid Droplets of Aqueous Solution inside a Microchannel
We experimentally
investigated the effect of a neighboring liquid
droplet on fluid convection inside a liquid droplet of aqueous solution
present inside a microchannel using the microscale particle image
velocimetry technique. There is no physical contact between the two
droplets, and the solute concentrations of the two droplets are set
at different values. Vapor concentration near the interface of the
two droplets is different due to the difference in solute concentration.
Water vapor evaporates from the low-concentration droplet having higher
vapor pressure and condenses on the high-concentration droplet having
lower vapor pressure. Evaporation and condensation induce Rayleigh
convection inside the two droplets. Flow pattern shows circulating
loops inside both liquid droplets. The circulations at the interacting
adjacent interface of the two droplets are opposite to each other.
The strength of flow inside the liquid droplets decreases with time
due to decrease in the difference of solute concentration between
the two droplets. The flow strength inside the two interacting droplets
is also a function of separation distance between the droplets. The
flow strength inside the droplets decreases with increase in separation
distance
Hydrodynamics of Two Interacting Liquid Droplets of Aqueous Solution inside a Microchannel
We experimentally
investigated the effect of a neighboring liquid
droplet on fluid convection inside a liquid droplet of aqueous solution
present inside a microchannel using the microscale particle image
velocimetry technique. There is no physical contact between the two
droplets, and the solute concentrations of the two droplets are set
at different values. Vapor concentration near the interface of the
two droplets is different due to the difference in solute concentration.
Water vapor evaporates from the low-concentration droplet having higher
vapor pressure and condenses on the high-concentration droplet having
lower vapor pressure. Evaporation and condensation induce Rayleigh
convection inside the two droplets. Flow pattern shows circulating
loops inside both liquid droplets. The circulations at the interacting
adjacent interface of the two droplets are opposite to each other.
The strength of flow inside the liquid droplets decreases with time
due to decrease in the difference of solute concentration between
the two droplets. The flow strength inside the two interacting droplets
is also a function of separation distance between the droplets. The
flow strength inside the droplets decreases with increase in separation
distance
Formal Total Synthesis of (+)-Neopeltolide
This paper describes the formal total synthesis of (+)-neopeltolide,
a cytotoxic macrolide isolated from the marine sponge Neopeltidae.
The key features of the synthesis include an asymmetric Evans alkylation
to fix the C9-methyl center, Jacobsen hydrolytic kinetic resolution
of terminal epoxides followed by their regioselective opening to fix
the stereocenters at the C11 and C13 positions, respectively, a Pd-catalyzed
oxa-Michael reaction to construct the tetrahydropyran ring, and Yamaguchi
macrolactonization to form the macrocyclic core of the molecule