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Technical Discussions
Mohd Zaki Nuawi
Consultant
National University of Malaysia, Malaysia, Joined Oct 1999, 5

Mohd Zaki Nuawi

Consultant
National University of Malaysia,
Malaysia,
Joined Oct 1999
5
04:31 Dec-09-1999
Water Bubble using ultrasound

I hope somebody can help me to find some article about the method
to produce water bubble using ultrasonic wave because lately they
use this method in washing machine. When more water bubble in
washing machine our washing become better.
Thank you.


 
 Reply 
 
Robert A. Day
Engineering
Milky Way Jewels, USA, Joined Nov 1998, 40

Robert A. Day

Engineering
Milky Way Jewels,
USA,
Joined Nov 1998
40
07:30 Dec-09-1999
Re: Water Bubble using ultrasound
You are probably thinking of cavitation. With sufficient intensity bubbles are produced which can collapse and produce high temperatures and shock waves. The shock waves are usually credited with the effectiveness of ultrasonic cleaning. A good place to start is F. Ronald Young's 'Cavitation', McGraw-Hill 1989. Another excellent source is Kenneth Suslick's 'Ultrasound: Its Chemical, Physical, and Biological Effects', VCH, 1988.

Ultrasonic cavitation is possible for continuous waves with a few watts power at 20 to 60 kHz. It can also be produced at frequencies of many MHz at higher power levels. Pulsed ultrasound can also produce cavitation at extreme power levels and is important in lithotripsy, the breaking of kidney stones via ultrasound.

Cavitation is also produced on the surface of propellers and other surface moving through water under certain conditions. It is important in detecting submarines, cavitation is loud and therefore easy to detect. It is also destructive and is a major industrial problem in the wear of propellers, pumps and other devises where it occurs.

Regards,
Rocky

: I hope somebody can help me to find some article about the method
: to produce water bubble using ultrasonic wave because lately they
: use this method in washing machine. When more water bubble in
: washing machine our washing become better.
: Thank you.




 
 Reply 
 
Dipl.-Ing. Martin Heinz
Dipl.-Ing. Martin Heinz
05:13 Dec-09-1999
Re: Water Bubble using ultrasound
: I hope somebody can help me to find some article about the method
: to produce water bubble using ultrasonic wave because lately they
: use this method in washing machine. When more water bubble in
: washing machine our washing become better.
: Thank you.

Please see the web page of the Fraunhofer Technology Center Hialeah (FTeCH):
http://www.ftech.org/technology/cleaning/washing.html

Best regards,

Dipl.-Ing. Martin Heinz.



 
 Reply 
 
Martynyuk Alexander
Martynyuk Alexander
03:00 Sep-03-2000
Re: Water Bubble using ultrasound
: I hope somebody can help me to find some article about the method
: to produce water bubble using ultrasonic wave because lately they
: use this method in washing machine. When more water bubble in
: washing machine our washing become better.
: Thank you.
The ultrasound lab in Kiev polytechnical institute in Ukraine carries out elaboration of models of ultrasound washing, ultrasound dispersion and ultrasound cavitation in radiator area and on the distance. Please, contact us :Martynyuk Alexander www.rivne.com/~modik or e-mail modik@rivne.com




 
 Reply 
 

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