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Yanada, Hideki

Affiliation Department of Mechanical Engineering
Title Professor
Fields of Research Fluid Engineering / Fluid Power Systems
Degree PhD in Engineering(Tokyo Institute of Technology)
Academic Societies Japan Society of Mechanical Engineers / The Japan Fluid Power System Society / Japan Society for Design Engineering / Society of Automotive Engineers of Japan / Japanese Society of Tribologists
E-mail yanada@me.
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Laboratory website URL
Researcher information URL(researchmap) Researcher information


The majority of the research topics are related to fluid power systems.

Theme1:Fundamental investigation and application of electrohydrodynamic (EHD) flow

Charge density distribution (Left: positive electrode, Right: negative electrode)

Flow of a dielectric fluid is generated by Coulomb force acting on excess electric charges in the fluid and the flow is called the electrohydrodynamic (EHD) flow. Fluids in which strong EHD flows can be easily generated have recently been discovered or developed, and the application research of EHD flow is now actively conducted. In this research topic, fundamental characteristics of EHD flow and its applications to, e.g., pumps are investigated by experiment and numerical simulation.

Selected publications and works

Nishikawara M., Yoneda R., Shinagawa Y., Yanada H., Miyakita T., Sawada K., Temperature dependence of the characteristics of an electrohydrodynamic pump with plate–bar electrodes, IEEE Transactions on Industry Applications, 56-1 (2020), 704-710.
(2)Nishikawara M., Shomura K., Yanada H., Synergy between injection and dissociation mechanisms in electrohydrodynamic pumps modeled numerically, Journal of Electrostatics, 93 (2018), 137-145.
(3)Yanada, H., Yamada, T., Asai, Y. and Terashita, Y., Measurement and numerical simulation of ion drag pump characteristics, Journal of Fluid Science and Technology, 5-3(2010), 617-631.


Electrohydrodynamics, EHD Pump, Charge injection, Dissociation, Heat transfer device

Theme2:Characteristic elucidation and efficiency improvement of fluid power components

Steady-state friction characteristic of a water hydraulic cylinder

Fluid power systems that use oil, water, or air as working fluid have the advantage of high output torque/thrust and high output power and are used in many applications such as vehicles and industrial machines. Energy conservation and environment are the most important key words for research and development also in fluid power technology field. In this research topic, (1) the characteristics of water hydraulic cylinder, which uses tap water as working fluid and is a typical actuator of water hydraulic systems (also called aqua drive systems, ADS), are investigated under various conditions. (2) Dynamic behaviors of rotors of a gear pump used in automobiles are investigated and power loss reduction is tackled. In addition, (3) static and dynamic behaviors of friction of fluid power actuators are examined and the friction behaviors are modelled.

Selected publications and works

(1)H. Yanada, Y. Ito, Y. Fujimoto, Characteristic of Water Hydraulic Cylinder, 10th JFPS International Symposium on Fluid Power, Fukuoka, Oct., 2017, (2017)
(2)Tran Xuan Bo, Do Viet Long, Hideki Yanada, Dynamic Friction Behaviour in Pre-Sliding Regime of Pneumatic Actuators, ASEAN Engineering Journal, Part A, 7-1 (2017), 55-73.
(3)Tran, X. B., Khaing, W. H., Endo, H., Yanada, H., Effect of friction model on simulation of hydraulic actuator, Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering, 228-9 (2014), 690-698.


Fluid power, Pump, Actuator, Cylinder, Seal, Friction model

Theme3:Development of high-performance filtration system for insulating liquids

Flow field and particle trajectories in a filter

An electrostatic oil filter can separate even submicrometer-sized contaminants from oil but its filtration speed is slow. Our laboratory proposed a charge-injection type of electrostatic oil filter and demonstrated that the filtration speed can be increased to a great or some degree by charge injection into oil. At present, fundamental studies of measurement of particle charges and particle trajectory simulation in filter models are conducted, and a filter configuration with a faster filtration speed is proposed.

Selected publications and works

(1)Yanada, H., Matsuura, S., Yokoyama, T., Nishikawara M., Numerical simulation of particle trajectories in the charge-injection type of electrostatic oil filter, JFPS International Journal of Fluid Power System, 11-1 (2018), 1-8.
(2)Yanada, H., Takagi, S., Mamiya, S., Effects of electrode and filter element shapes on characteristics of charge injection type of electrostatic oil filter, Journal of Electrostatics, 74 (2015), 1-7.
(3)Yanada, H., Daiou, Y., Ogi, Y, Improvement of filtration speed of charge injection type of electrostatic oil filter, Journal of Electrostatics, 70-1(2012), 117-125.


Filtration, Lubricating oil, Oil saving, Electrostatic filter, Charge injection, Zeta potential

Title of class

Fluid Power Engineering(M41630170)

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