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Newsletter  2018.1  Index

Theme : "Mechanical Engineering Congress, 2017 Japan (MECJ-17)"

  1. Preface
  2. Research Progress of Functional Fluids Engineering
    Hideya NISHIYAMA (Tohoku University)
  3. Heat transfer enhancement and drag reducing methods inspired by the skin surfaces of dolphins
    Yoshimichi HAGIWARA (Kyoto Institute of Technology)
  4. On the injection depth of the laser-induced microjet into the soft material
    Nanami ENDO, Sennosuke KAWAMOTO, Yoshiyuki TAGAWA (Tokyo University of Agriculture and Technology)
  5. Cavitation onset induced by sudden acceleration
    Akihito KIYAMA (Tokyo University of Agriculture and Technology), Zhao Pan (Utah State University), Yoshiyuki TAGAWA (Tokyo University of Agriculture and Technology), Jesse Daily (Naval Undersea Warfare Center), Scott Thomson (Brigham Young University), Randy Hurd, Tadd Truscott (Utah State University)
  6. Investigation of the sustaining mechanism of turbulence of Newtonian fluids by using viscoelastic fluids
    Yasufumi HORIMOTO, Susumu GOTO (Osaka University)


Research Progress of Functional Fluids Engineering

Tohoku University



The concept of functional fluids such as plasma flows, MR fluids and magnetic fluid is defined. To create the frontier field of fluids engineering, fusion of functional fluids engineering with different fields of chemical engineering, nano-micro science, control engineering and material science is needed.

Figure 1 shows the establishment of electromagnetic functional flow systems. There are two approaches to establish the electromagnetic functional fluid flow systems which are applied to the environmental and energy conversion systems, material processes, medical and biological treatments. The first approach is multiphase flow effect by mixing functional fluids with particle, droplet and bubble. The second one is the chemical reaction or interaction at the gas-liquid interface or the solid surface. Then, by controlling and integrating spatio-temporal nano-micro scale interactions in multiphase and functional flow dynamics, we can establish the electromagnetic flow systems which has macro scale performance with responding to the external fields.

Figure 2 shows the research frontier of functional fluids which has been conducted experimentally and theoretically by my group. The researches so far on functional plasma flows, MR fluids and magnetic fluid and their innovative applications are reviewed by our published papers and books.

As for the plasma flows, there are thermal plasma flow as a heat source and non-thermal plasma flow as a radical source with chemical reaction. The applications are as follows: The first applications are film coating and particle synthesis, bio-mass gasification and small gas circuit breaker by using thermal plasma flow. The second ones are combustion assist, water purification and powder transportation with surface cleaning by using non-thermal plasma flow. The third one is establishment of control systems of plasma flow systems for high quality particle synthesis and surface treatment.

As for the MR fluids and magnetic fluid, the pipe flow control using MR fluids cluster interacted with pipe materials and surface, furthermore, corona discharge using magnetic fluid spike with droplet ejection for air cleaning are reviewed.

Finally, the challenging strategy of frontier fluids engineering in the future is proposed for the young scientists and engineers.


Key words

Functional fluids, Plasma flows, MR fluids, Magnetic fluid, Control, Multiphase flow, Electromagnetic effect, Chemical reaction, Multiscale



Figure1 Establishment of electromagnetic functional flow systems.

Figure 2 Research frontier of functional fluids.

Last Update:30.1.2018