where expertise comes together - since 1996

Web's Largest Portal of Nondestructive Testing (NDT)
Open Access Database (Conference Proceedings, Articles, News), Exhibition, Forum, Network

All Forum Boards
Technical Discussions >
question about freezing point
Career Discussions
Job Offers
Job Seeks
Classified Ads
About NDT.net
Articles & News

442 views
05:59 Feb-05-2000
Dinko Dinev
question about freezing point

How to define by a ultrasonic method a beginning crystallization and point of freezing of complex biological liquids, for example, milk


 
07:56 Feb-05-2000

Robert (Rocky) A. Day

Engineering
Milky Way Jewels,
USA,
Joined Nov 1998
40
Re: question about freezing point Changes of state produce changes in velocity and attenuation. Both are easily measured and in the case of water to ice very dramatic.

The simplest setup is a pulse echo immersion transducer in a water tank with either the amplitude of the back wall of the water tank monitored. Or the time of flight monitored. Or both.

The influence of biological material in the water, other than lowering the freezing point, is uncertain but I would still expect a dramatic change in both of these ultrasonic properties when the fluid freezes.

: How to define by a ultrasonic method a beginning crystallization and point of freezing of complex biological liquids, for example, milk




 


© NDT.net - The Web's Largest Portal of Nondestructive Testing (NDT) ISSN 1435-4934

Open Access Database, |Conference Proceedings| |Articles| |News| |Exhibition| |Forum| |Professional Network|