Controlling the acoustic streaming by pulsed ultrasounds

Ultrasonics
Mauricio Hoyos, Angélica Castro

Abstract

We propose a technique based on pulsed ultrasounds for controlling, reducing to a minimum observable value the acoustic streaming in closed ultrasonic standing wave fluidic resonators. By modifying the number of pulses and the repetition time it is possible to reduce the velocity of the acoustic streaming with respect to the velocity generated by the continuous ultrasound mode of operation. The acoustic streaming is observed at the nodal plane where a suspension of 800nm latex particles was focused by primary radiation force. A mixture of 800nm and 15μm latex particles has been also used for showing that the acoustic streaming is hardly reduced while primary and secondary forces continue to operate. The parameter we call "pulse mode factor" i.e. the time of applied ultrasound divided by the duty cycle, is found to be the adequate parameter that controls the acoustic streaming. We demonstrate that pulsed ultrasound is more efficient for controlling the acoustic streaming than the variation of the amplitude of the standing waves.

References

Jan 1, 1997·Journal of Applied Microbiology·J J HawkesW T Coakley
Jan 7, 1998·Trends in Biotechnology·W T Coakley
Jun 9, 1998·The British Journal of Radiology·G ZauharF A Duck
Mar 8, 2005·Ultrasound in Medicine & Biology·Despina BazouW Terence Coakley
Oct 26, 2005·Biosensors & Bioelectronics·Stacey P MartinW Terence Coakley
Nov 1, 2005·Biosensors & Bioelectronics·Larisa A KuznetsovaW Terence Coakley
Feb 23, 2007·Analytical Chemistry·Mikael EvanderJohan Nilsson
Jul 31, 2008·Ultrasonics·R J TownsendM B McDonnell
Jan 27, 2010·Analytical Chemistry·Claire Ratier, Mauricio Hoyos
Feb 18, 2010·Lab on a Chip·Rune BarnkobHenrik Bruus
Apr 27, 2012·Ultrasonics·Despina BazouMauricio Hoyos

❮ Previous
Next ❯

Citations

Nov 27, 2015·Pharmaceutical Development and Technology·Kevin Ita
Dec 17, 2014·Environmental Technology·Kwang Ho AhnKwang Baik Ko
Feb 12, 2017·Lab on a Chip·Yuta KurashinaJames Friend
Feb 27, 2018·Physical Review Letters·Jonas T KarlsenHenrik Bruus
Jan 15, 2016·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Peter Barkholt Muller, Henrik Bruus
Jun 13, 2020·Physical Review Letters·Jacob S Bach, Henrik Bruus
Mar 16, 2019·Proceedings of the National Academy of Sciences of the United States of America·Shuai YueJiming Bao
Feb 2, 2021·Chemical Reviews·Fernando SotoJoseph Wang

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.