Fog Droplet Size as a function of Ultrasound Frequency

Click For Summary
SUMMARY

The size of water droplets produced by ultrasonic foggers is directly influenced by the ultrasonic frequency used, with higher frequencies resulting in smaller droplet diameters. For instance, an ultrasonic fogger operating at 1.75 MHz generates approximately 5-micron droplets. This relationship is critical for applications such as decontamination protocols in various settings, including aircraft and public transportation. The physics behind this phenomenon involves mechanical vibrations that create micron-sized particles, which can be further explored through specific research articles and resources.

PREREQUISITES
  • Understanding of ultrasonic frequency and its effects on particle size
  • Familiarity with ultrasonic fogging technology
  • Basic knowledge of fluid dynamics and particle generation
  • Awareness of applications in decontamination and humidification
NEXT STEPS
  • Research the mathematical models describing droplet size as a function of ultrasonic frequency
  • Explore the physics of mechanical vibrations in particle generation
  • Investigate the applications of ultrasonic fogging in decontamination protocols
  • Review studies on the effectiveness of dry fogging versus wet fogging
USEFUL FOR

Researchers, engineers, and professionals in the fields of decontamination, humidification, and ultrasonic technology will benefit from this discussion, particularly those involved in developing and implementing ultrasonic fogging systems.

Moondog
Messages
14
Reaction score
7
TL;DR
Water driplets (fog, mist) size can be manipulated using ultrasonic frequency such that higher frequencies create smaller diameter particles.
I need to know how to predict particle size of a water driplet produced by a given ultrasonic frequency? For example, an ultrasonic fogger will create ~5 micron water driplets at a frequency of 1.75 MHz. I do know that the higher the frequency the smaller the driplet diameter. How is this relationship described mathematically and what is the physics for how mechanical vibrations actually generate micron-sized particles?
 
Engineering news on Phys.org
Moondog said:
Summary:: Water driplets (fog, mist) size can be manipulated using ultrasonic frequency such that higher frequencies create smaller diameter particles.

For example, an ultrasonic fogger will create ~5 micron water driplets at a frequency of 1.75 MHz
Do you have any links to descriptions of such foggers?
 
Berkman: House of hydro (https://thehouseofhydro.com/) See dropdown for "Store" tab. Thanks for any help... The FAQs state "House of Hydro ultrasonic water foggers use high output ceramic discs that vibrate 1.7mhz to silently create microscopic (<5 micron) water droplets."
 
Moondog said:
Berkman: House of hydro (https://thehouseofhydro.com/) See dropdown for "Store" tab. Thanks for any help... The FAQs state "House of Hydro ultrasonic water foggers use high output ceramic discs that vibrate 1.7mhz to silently create microscopic (<5 micron) water droplets."
Thanks. What are these used for? Room humidifiers mainly? Is that the application you have in mind?
 
Berkman: I am working to show DoD (and FAA) how dry fogging our patented protocol antibacterial can decontaminate a biologically contaminated aircraft (including sporulating pathogens like anthrax) and return it to clearance standards within 24 yours. We will also expand the use of this protocol to decontaminate hospitality settings, cruise lines, public transportation, hospitals, etc. We've already done this with wet fogging, but dry fogging would be more efficient, effective, and safe for electronics.
 
  • Like
Likes berkeman
Thanks Tom. Very interesting and a good starting place.
 
  • Like
Likes Tom.G and berkeman

Similar threads

  • · Replies 12 ·
Replies
12
Views
4K
  • · Replies 11 ·
Replies
11
Views
6K
  • · Replies 2 ·
Replies
2
Views
5K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 2 ·
Replies
2
Views
7K
  • · Replies 8 ·
Replies
8
Views
4K
Replies
17
Views
5K
  • · Replies 15 ·
Replies
15
Views
3K
Replies
3
Views
2K
Replies
1
Views
4K