Precision flow pumps have been widely studied over the last three decades. They have been applied in the areas of
Biology, Pharmacy and Medicine in applications usually related to the dosage of medicine and chemical reagents.
In addition, thermal management solutions for electronic devices have also been recently developed using these
kinds of pumps offering better performance with low noise and low power consumption. In previous works was
presented the working principle of a pump based on the use of a bimorph piezoelectric actuator inserted in a
fluid channel to generate flow. This work presents a novel configuration of piezoelectric flow pumps using a
bimorph piezoelectric actuator of different aspect ratio. Sensibility studies of the rectangular cross-sectional area
channel are conducted computationally (CFD) and three parameters are investigated: resonance frequency and
oscillation amplitude of the piezoelectric actuator, and pressure inside the channel. Also, experimental tests are
conducted to verify the influence of clamps' rigidity and actuator's insulator. The experimental results show
that improving these two aspects it is possible to achieve higher flow rates.
Precision flow pumps have been widely studied over the last three decades. They have been applied in the areas of
Biology, Pharmacy and Medicine in applications usually related to the dosage of medicine and chemical reagents.
In addition, thermal management solutions for electronic devices have also been recently developed using these
kinds of pumps offering better performance with low noise and low power consumption. In a previous work, the
working principle of a pump based on the use of bimorph piezoelectric actuators inserted in a fluid channel to
generate flow was presented. The present work aims at the development of novel configurations of piezoelectric
flow pumps based on the use of bimorph actuators with biomimetic tip geometries that are inspired in fish caudal
fin shapes, such as ostraciiform, subcarangiform, carangiform and thunniform. The pump development consists
in designing, manufacturing and experimental characterization steps. In the design step, computational models of
pump configurations are built to perform sensitivity studies and to apply optimization techniques using ANSYS
finite element analysis software. The prototype manufacturing is guided by the computational simulations.
Electronic circuits for pump electrical excitation and control are developed and implemented. Comparisons
among numerical and experimental results are also made.
The microchips inside modern electronic equipment generate heat and demand, each day, the use of more
advanced cooling techniques as water cooling systems, for instance. These systems combined with piezoelectric
flow pumps present some advantages such as higher thermal capacity, lower noise generation and miniaturization
potential. The present work aims at the development of a water cooling system based on a piezoelectric flow
pump for a head light system based on LEDs. The cooling system development consists in design, manufacturing
and experimental characterization steps. In the design step, computational models of the pump, as well as the
heat exchanger were built to perform sensitivity studies using ANSYS finite element software. This allowed us
to achieve desired flow and heat exchange rates by varying the frequency and amplitude of the applied voltage.
Other activities included the design of the heat exchanger and the dissipation module. The experimental tests of
the cooling system consisted in measuring the temperature difference between the heat exchanger inlet and outlet
to evaluate its thermal cooling capacity for different values of the flow rate. Comparisons between numerical and
experimental results were also made.
Precision flow pumps have been widely studied over the last three decades. They have been applied in the areas of
Biology, Pharmacy and Medicine in applications usually related to the dosage of medicine and chemical reagents.
In addition, thermal management solutions for electronic devices have also been recently developed using these
kinds of pumps offering better performance with low noise and low power consumption. In a previous work, the
working principle of a pump based on the use of a bimorph piezoelectric actuator inserted in a fluid channel to
generate flow was presented. In this work, a novel configuration of this piezoelectric flow pump that consists
of a flow pump using two bimorph piezoelectric actuators in parallel configuration has been studied and it is
presented. This configuration was inspired on fish swimming modes. The complete cycle of pump development
was conducted, consisting in designing, manufacturing, and experimental characterization steps. Load-loss and
flow rate characterization experimental tests were conducted, generating data that allows us to analyze the
influence of geometric parameters in the pump performance. Comparisons among numerical and experimental
results were made to validate the computational results and improve the accuracy of the implemented models.
Precision flow pumps have been widely studied over the last three
decades. They have been applied as essential components in thermal
management solutions for cooling electronic devices offering better
performance with low noise and low power consumption. In this work,
a novel configuration of a miniature piezoelectrically actuated flow
pump with the purpose of cooling a LED set inside a head light
system for medical applications has been studied and it will be
presented. The complete cycle of pump development was conducted. In
the design step, the ANSYS finite element analysis software
has been applied to simulate and study the fluid-structure
interaction inside the pump, as well as the bimorph piezoelectric
actuator behavior. In addition, an optimization process was carried
out through Altair Hyperstudy software to find a set of
parameter values that maximizes the pump performance measured in
terms of flow rate. The prototype manufacturing was guided based on
computational simulations. Flow characterization experimental tests
were conducted, generating data that allows us to analyze the
influence of frequency and amplitude parameters in the pump
performance. Comparisons between numerical and experimental results
were also made.
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