On The Relation Between Geometric And Flow
Properties Of A Miniaturized Fluid Oscillator
Author(s)
J. O. Sotero-Esteva, R. Furlan & J. J. Santiago-Avilés
Abstract
A miniaturized fluid oscillator with no movable parts composed by a switching
cavity, one inlet, two outlets and two feedback channels was studied. Examples
of these devices have been built before and had shown oscillation of fluid flows
ranging from tens of Hz for liquids to thousand of Hz for gases. The present
work consists of a study of the flow within the device by means of a computer
model. The computer model was built using COMSOL 3.3. It uses conventional
Navier-Stokes equations numerically solved by Finite Element Methods. A new
level of detail of the qualitative description of the flow within the device is
achieved which allows for a better understanding of why some geometries
produce better devices than others. It shows that homogeneous oscillation, not
only depend on the direct force exerted by the feedback flow on the inlet stream,
but also on the disruption of the Coanda's effect that diverts the stream towards
one of the output channels. On the other hand, the quantitative part of the study
serves to validate the simulation as well as a basis for proposing new empirical
models. The quantitative measurements are consistent with a previously known
mathematical model that describes the relation between frequency, input velocity
and geometrical and physical properties. Ongoing testing with actual devices
also supports the proposed operating mechanisms and models.
Keywords: fluidic, flow control, flow meter, fluidic oscillator, finite element
method, computer simulation.
Keywords
fluidic, flow control, flow meter, fluidic oscillator, finite element
method, computer simulation.
Related Book
Other papers in this volume
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