Microfiltration is an in-process recycling method that shows great potential to extend fluid life and reduce bacterial concentrations in synthetic and semisynthetic metalworking fluids. The primary problem facing the use of microfiltration is membrane fouling, which is the blocking of membrane pores causing reduced flux. In this paper a fluid dynamic model of partial and complete blocking in sintered alumina membranes is developed that includes hydrodynamic, electrostatic, and Brownian forces. Model simulations are employed to study the impact of electrostatic and Brownian motion forces on the progression of partial blocking. The simulations also examine the effects of fluid velocity, particle size, and particle surface potential. The inclusion of electrostatic and Brownian forces is shown to significantly impact the progression of the partial blocking mechanism. The addition of a strong interparticle electrostatic force is shown to eliminate the partial blocking build-up of small particles due to the presence of the repulsive forces between the particles. As a result, the time to complete blocking of the test pore was lengthened, suggesting that flux decline is reduced in the presence of electrostatic forces. The Brownian motion is shown to have a large impact at low fluid velocities. The most effective parameter set is a low fluid velocity, small particle sizes, high microemulsion surface potential, and high membrane surface potential.
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February 2010
Research Papers
The Impact of Surface Forces on Particle Flow and Membrane Fouling in the Microfiltration of Metalworking Fluids
Seounghyun Ham,
Seounghyun Ham
Department of Mechanical Science and Engineering,
University of Illinois at Urbana-Champaign
, Urbana, IL 61801
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Shiv G. Kapoor,
Shiv G. Kapoor
Department of Mechanical Science and Engineering,
University of Illinois at Urbana-Champaign
, Urbana, IL 61801
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Richard E. DeVor,
Richard E. DeVor
Department of Mechanical Science and Engineering,
University of Illinois at Urbana-Champaign
, Urbana, IL 61801
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John Wentz
John Wentz
School of Engineering,
University of St. Thomas
, St. Paul, MN 55105
Search for other works by this author on:
Seounghyun Ham
Department of Mechanical Science and Engineering,
University of Illinois at Urbana-Champaign
, Urbana, IL 61801
Shiv G. Kapoor
Department of Mechanical Science and Engineering,
University of Illinois at Urbana-Champaign
, Urbana, IL 61801
Richard E. DeVor
Department of Mechanical Science and Engineering,
University of Illinois at Urbana-Champaign
, Urbana, IL 61801
John Wentz
School of Engineering,
University of St. Thomas
, St. Paul, MN 55105J. Manuf. Sci. Eng. Feb 2010, 132(1): 011006 (9 pages)
Published Online: January 6, 2010
Article history
Received:
March 20, 2009
Revised:
November 13, 2009
Online:
January 6, 2010
Published:
January 6, 2010
Citation
Ham, S., Kapoor, S. G., DeVor, R. E., and Wentz, J. (January 6, 2010). "The Impact of Surface Forces on Particle Flow and Membrane Fouling in the Microfiltration of Metalworking Fluids." ASME. J. Manuf. Sci. Eng. February 2010; 132(1): 011006. https://doi.org/10.1115/1.4000714
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