FEM-based time-reversal enhanced ultrasonic cleaning

Autor: Joonas Mustonen, Oskari Tommiska, Axi Holmström, Timo Rauhala, Petro Moilanen, Maria Gritsevich, Ari Salmi, Edward Hæggström

Publikováno v: Ultrasonics Sonochemistry, Vol 79, Iss , Pp 105798- (2021)

Pipe fouling is a challenging problem in many industrial applications. Current cleaning techniques require halting the production during the cleaning phase and the existing methods are unable to do targeted cleaning, even though fouling is often loca

Externí odkaz: https://doaj.org/article/549725df7974489581094ac7bfee5172

BEM-FEM Simulation of Acoustic Levitation Dynamics with Phased Arrays

Autor: Marika Sirkka, Joni Makinen, Oskari Tommiska, Denys Iablonskyi, Ari Salmi, Edward Haeggstrom

Publikováno v: 2022 IEEE International Ultrasonics Symposium (IUS).

We present a simulation model that can be used to study the movement of an object in an acoustic levitator. The model uses the boundary element method (BEM) to compute the levitator's acoustic field, and the finite element method (FEM) to compute the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fa729af18424c8ea303bb7ecb2d37a0b
https://doi.org/10.1109/ius54386.2022.9958660

Practical scale modification of oleogels by ultrasonic standing waves

Autor: Petri Lassila, Fabio Valoppi, Oskari Tommiska, Jere Hyvönen, Axi Holmström, Sami Hietala, Ari Salmi, Edward Haeggström

Publikováno v: Ultrasonics Sonochemistry

Lipid-based materials, such as substitutes for saturated fats (oleogels) structurally modified with ultrasonic standing waves (USW), have been developed by our group. To enable their potential application in food products, pharmaceuticals, and cosmet

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bf885da5261a70b8afeb008a2f4ea91c
https://pubmed.ncbi.nlm.nih.gov/35367736

Controlling oleogel crystallization using ultrasonic standing waves

Autor: Petteri Helander, Luisa Barba, Tuomas Puranen, Edward Hæggström, Ari Salmi, Oskari Tommiska, Jesse Heikkila, Fabio Valoppi, Miika Ratilainen

Publikováno v: Scientific Reports
Scientific reports (Nature Publishing Group) 10 (2020). doi:10.1038/s41598-020-71177-6
info:cnr-pdr/source/autori:Valoppi F.; Salmi A.; Ratilainen M.; Barba L.; Puranen T.; Tommiska O.; Helander P.; Heikkila J.; Haeggstrom E./titolo:Controlling oleogel crystallization using ultrasonic standing waves/doi:10.1038%2Fs41598-020-71177-6/rivista:Scientific reports (Nature Publishing Group)/anno:2020/pagina_da:/pagina_a:/intervallo_pagine:/volume:10
Scientific Reports, Vol 10, Iss 1, Pp 1-13 (2020)

Oleogels are lipid-based soft materials composed of large fractions of oil (> 85%) developed as saturated and hydrogenated fat substitutes to reduce cardiovascular diseases caused by obesity. Promising oleogels are unstable during storage, and to imp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::68f509251511f2cc237836f119b4487b
https://pubmed.ncbi.nlm.nih.gov/32879336

High-power and time-reversed ultrasound based on FEM simulations and experiments

Autor: Edward Haggstrom, Petro Moilanen, Maria Gritsevich, Ari Salmi, Joonas Mustonen, Timo Rauhala, Oskari Tommiska

Publikováno v: 2019 IEEE International Ultrasonics Symposium (IUS).

Time-reversal (TR) is method to focus acoustic energy inside complex media. TR focusing to a predefined target point requires either an echo from a target point with acoustic impedance contrast or direct impulse actuation at the target point. Here, w

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d5cc1c9b508e20a80b25b817a5f2477a
https://doi.org/10.1109/ultsym.2019.8925992