Archive for November, 2007
Birck Nanotechnology Center
November 27, 2007 9:02 pmBirck Nanotechnology Center is the latest addition to Purdue Universities biomedical engineering buildings. The building was completed in 2005 with a cost of $58 million dollars.
The highlight of the building is the 25,000 square ft. cleanroom.
Birck Nanotechnology center allows researchers from other companies, universities, and national labs to use the facility.
Here is a list of Birck’s key capabilities.
Most of the research at the center is done by Purdue professors and their PHD students. You can find a list of Purdue’s Biomedical Engineering faculty and their research interest here.
Ultrasonic Horn Design
November 24, 2007 1:58 amI was working on a project where I needed to design a horn for an ultrasonic machine to concentrate the ultrasonic power in a smaller area. The machine is not being used to welding (typical use of ultrasonic guns), instead it is being used to produce small bubbles in a small tube.
Following is what I found about this design.
There are three different horn designs that can be implemented:
1- Conventional design
2- Folded horn
3- Dog-bone horn
Folded and Dog-bone designs seemed too complicated and are meant for more precise ultrasonic horns (used mostly for welding).
Here are two designs for the conventional horns. Typically the length of the horn should be half of the wavelength of used frequency.
(This is from a catalog of horns used mostly in welding)
(This is a more simple design that works better for my purposes)
Now, I just have to have this made at the mechanical shop and see how effective it will be.
Here are some other useful webpages:
Novel Horn Designs (Very good paper)
