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Iranian physicists succeed in inventing the first "liquid motor"


Interesting scientific project by Iranian researchers gets attention by Scientific American Magazine - By exploring a new physical phenomenon, the Physics department researchers of Iran's Sharif Industrial University succeeded in designing a new device (Liquit Motor) made of a film of floating water or other liquids with the ability to twist controllably.

R. Shirsavar et al.; Sharif University of Technology Medical Physics Lab

This creative motor which has gained the attention of the prominent magazine, Scientific American, and made them write an article in their latest issue, is made of a thin layer of a liquid in which an electricity current runs through and an external electrical field perpendicular to that current, according to Iranian Students News Agency's science correspondent.


If the external field or electrolyze voltage increases (while the other one is not null), the liquid film begins to twist.


Using this device which works perfectly both with AC and DC electrical currents,  researchers can easily make whirlpools in the thin liquid film with electrical fields.


Reza Shirsavar, physics PHD student in dense materials from Sharif University and one of the researchers on this project told ISNA's science correspondent: This project is an experimental work which began about three years ago in Dr. Ahmad Amjadi medical physics laboratory with the cooperation between Dr. Reza Ejtehadi and me, and it's related to a physical phenomenon which is being observed for the first time and now we are examining it with physical aspects to realize the cause and the potential functional use for it.


Describing this phenomenon, he said: If we force an electric field to a layer containing electric current, the layer would begin to twist and because its start and pause, velocity and the direction are controllable, we call it a motor.

According to the researcher, this system, the report of which has been published recently, works perfectly in pure water and with adding an amount of glycerin and a bit of bleach to this mixture, micron or even nanometers films of that fluid can twist continuously for several minutes.


However, this is a basic phenomenon which makes us review our previous knowledge in this field and anyhow the fact that it's doable to twist a liquid with full control, certainly will have various functions; e.g. in blood centrifuges and other biological systems, emphasized Shirsavar.


The liquid motor designed by Sharif University researchers, may not be able to make a vehicle run, but the perspective for mixing liquids in medical and industrial processes or its use in fluid physics researches should not be forgotten.


Note: Original article published in Persian by ISNA.
Translated for by BMarz translators:

... Payvand News - 8/11/08 ... --

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