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This video shows an EHD induction pump in a horizontal axisymmetric
configuration. The net charges necessary for the EHD induction pumping
are induced by a temperature gradient present in the liquid. Various
dielectric fluids have been evaluated. With undoped n-Hexane as
working fluid, bulk fluid velocities as high as 18 cm/s (at the
applied voltage of 12 kV and 4 Hz) have been achieved.
This video shows a two-phase (stratified liquid/vapor) EHD induction
pump in a horizontal channel configuration. The net charges necessary
for the EHD induction pumping are induced at the liquid/ vapor
interface due to the discontinuity of the electric conductivity.
Several dielectric fluids have been used as the working fluid. Peak
velocities as high as 11 cm/s (at the applied voltage of 8 kV and 10
Hz) have been achieved.
This video shows the external condensation on a horizontal tube in the
absence of electric fields. The working fluid is refrigerant R-123.
The gravitational force drains the condensation from the tube.
This video shows the external condensation film on a horizontal tube
in the presence of EHD induction pumping. The working fluid is
refrigerant R-123. The generated induction pumping of the condensation
film significantly enhances the condensation process and it allows for
the control of the liquid film flow.
This video shows a liquid phase ion-drag pump with a unique electrode
design. Various dielectric fluids have been evaluated. Bulk velocities
as high as 33.4 cm/s at 25kV have been achieved.
This video shows the pool boiling heat transfer enhancement with the
application of electric fields, based on the dielectrophoretic force.
Various dielectric fluids have been evaluated. Enhancements of upto
570% in heat transfer have been achieved, depending on the working
fluid thermal and electric properties as well as the operating
conditions.
This video shows film condensation on a vertical tube in the presence
of electric fields. Refrigerant R-113 is used as the working fluid.
The condensate on the vertical tube is removed by the
dielectrophoretic force and swept away by the spiral electrodes. Upto
a factor of 2.2 enhancements in condensation heat transfer have been
achieved.
This is a micro pump for water droplet transportation. A water droplet
of 1 mm in size is pumped with a traveling DC field. Electrodes with
width of 150 microns and spacing of 150 microns are used.
This video shows a two-phase (stratified liquid/vapor) EHD conduction
pump in a horizontal channel configuration. The charges associated
with the hetrocharge layers of finite thickness in the vicinity of the
electrodes are utilized to pump the liquid film. Various dielectric
fluids have been evaluated.
For more information about this laboratory, please contact
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