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Title: Micromachined magnetohydrodynamic actuators and sensors

Abstract

A magnetohydrodynamic (MHD) micropump and microsensor which utilizes micromachining to integrate the electrodes with microchannels and includes a magnet for producing magnetic fields perpendicular to both the electrical current direction and the fluid flow direction. The magnet can also be micromachined and integrated with the micropump using existing technology. The MHD micropump, for example, can generate continuous, reversible flow, with readily controllable flow rates. The flow can be reversed by either reversing the electrical current flow or reversing the magnetic field. By mismatching the electrodes, a swirling vortex flow can be generated for potential mixing applications. No moving parts are necessary and the dead volume is minimal. The micropumps can be placed at any position in a fluidic circuit and a combination of micropumps can generate fluidic plugs and valves.

Inventors:
 [1];  [2]
  1. (Walnut Creek, CA)
  2. (Union City, CA)
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
873369
Patent Number(s):
6146103
Assignee:
Regents of University of California (Oakland, CA) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
micromachined; magnetohydrodynamic; actuators; sensors; mhd; micropump; microsensor; utilizes; micromachining; integrate; electrodes; microchannels; magnet; producing; magnetic; fields; perpendicular; electrical; current; direction; fluid; flow; integrated; existing; technology; example; generate; continuous; reversible; readily; controllable; rates; reversed; reversing; field; mismatching; swirling; vortex; generated; potential; mixing; applications; moving; dead; volume; minimal; micropumps; placed; position; fluidic; circuit; combination; plugs; valves; dead volume; flow direction; flow rates; magnetic field; flow rate; magnetic fields; fluid flow; current flow; electrical current; vortex flow; producing magnetic; /417/

Citation Formats

Lee, Abraham P., and Lemoff, Asuncion V. Micromachined magnetohydrodynamic actuators and sensors. United States: N. p., 2000. Web.
Lee, Abraham P., & Lemoff, Asuncion V. Micromachined magnetohydrodynamic actuators and sensors. United States.
Lee, Abraham P., and Lemoff, Asuncion V. Sat . "Micromachined magnetohydrodynamic actuators and sensors". United States. https://www.osti.gov/servlets/purl/873369.
@article{osti_873369,
title = {Micromachined magnetohydrodynamic actuators and sensors},
author = {Lee, Abraham P. and Lemoff, Asuncion V.},
abstractNote = {A magnetohydrodynamic (MHD) micropump and microsensor which utilizes micromachining to integrate the electrodes with microchannels and includes a magnet for producing magnetic fields perpendicular to both the electrical current direction and the fluid flow direction. The magnet can also be micromachined and integrated with the micropump using existing technology. The MHD micropump, for example, can generate continuous, reversible flow, with readily controllable flow rates. The flow can be reversed by either reversing the electrical current flow or reversing the magnetic field. By mismatching the electrodes, a swirling vortex flow can be generated for potential mixing applications. No moving parts are necessary and the dead volume is minimal. The micropumps can be placed at any position in a fluidic circuit and a combination of micropumps can generate fluidic plugs and valves.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {1}
}

Patent:

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