The Forces Driving Streaming in the Presence of Scatterers Mimicking the Blood Cells and the Contrast Agents
Acoustical Driving Forces (ADF), induced by propagating waves in a homogeneous and inhomogeneous lossy fluid (suspension), are determined and compared depending on the concentration of suspended particles. Using integral equations of the scattering theory, the single particle (inclusion) ADF was cal...
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Institute of Fundamental Technological Research Polish Academy of Sciences
2019-11-01
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| Series: | Archives of Acoustics |
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| Online Access: | https://acoustics.ippt.pan.pl/index.php/aa/article/view/2587 |
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| author | Janusz WÓJCIK Wojciech SECOMSKI Norbert ZOŁEK |
| author_facet | Janusz WÓJCIK Wojciech SECOMSKI Norbert ZOŁEK |
| author_sort | Janusz WÓJCIK |
| collection | DOAJ |
| description | Acoustical Driving Forces (ADF), induced by propagating waves in a homogeneous and inhomogeneous lossy fluid (suspension), are determined and compared depending on the concentration of suspended particles. Using integral equations of the scattering theory, the single particle (inclusion) ADF was calculated as the integral of the flux of the momentum density tensor components over the heterogeneity surface. The possibility of negative ADF was indicated. Originally derived, the total ADF acting on inclusions only, stochastically distributed in ambient fluid, was determined as a function of its concentration. The formula for the relative increase in ADF, resulting from increased concentration was derived. Numerical ADF calculations are presented. In experiments the streaming velocities in a blood-mimicking starch suspension (2 μm radius) in water and Bracco BR14 contrast agent (SF6 gas capsules, 1 μm radius) were measured as the function of different inclusions concentration. The source of the streaming and ADF was a plane 2 mm diameter 20 MHz ultrasonic transducer. Velocity was estimated from the averaged Doppler spectrum obtained from originally developed pulsed Doppler flowmeter. Numerical calculations of the theoretically derived formula showed very good agreement with the experimental results. |
| format | Article |
| id | doaj-art-1adf548b2ba84156b8783c8d8075ddc5 |
| institution | DOAJ |
| issn | 0137-5075 2300-262X |
| language | English |
| publishDate | 2019-11-01 |
| publisher | Institute of Fundamental Technological Research Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Acoustics |
| spelling | doaj-art-1adf548b2ba84156b8783c8d8075ddc52025-08-20T03:15:54ZengInstitute of Fundamental Technological Research Polish Academy of SciencesArchives of Acoustics0137-50752300-262X2019-11-0144410.24425/aoa.2019.129722The Forces Driving Streaming in the Presence of Scatterers Mimicking the Blood Cells and the Contrast AgentsJanusz WÓJCIK0Wojciech SECOMSKI1Norbert ZOŁEK2Institute of Fundamental Technological Research, Polish Academy of SciencesInstitute of Fundamental Technological Research, Polish Academy of SciencesInstitute of Fundamental Technological Research, Polish Academy of SciencesAcoustical Driving Forces (ADF), induced by propagating waves in a homogeneous and inhomogeneous lossy fluid (suspension), are determined and compared depending on the concentration of suspended particles. Using integral equations of the scattering theory, the single particle (inclusion) ADF was calculated as the integral of the flux of the momentum density tensor components over the heterogeneity surface. The possibility of negative ADF was indicated. Originally derived, the total ADF acting on inclusions only, stochastically distributed in ambient fluid, was determined as a function of its concentration. The formula for the relative increase in ADF, resulting from increased concentration was derived. Numerical ADF calculations are presented. In experiments the streaming velocities in a blood-mimicking starch suspension (2 μm radius) in water and Bracco BR14 contrast agent (SF6 gas capsules, 1 μm radius) were measured as the function of different inclusions concentration. The source of the streaming and ADF was a plane 2 mm diameter 20 MHz ultrasonic transducer. Velocity was estimated from the averaged Doppler spectrum obtained from originally developed pulsed Doppler flowmeter. Numerical calculations of the theoretically derived formula showed very good agreement with the experimental results.https://acoustics.ippt.pan.pl/index.php/aa/article/view/2587streaming suspensionscatteringacoustical driving forceDoppler measurementscontrast agents |
| spellingShingle | Janusz WÓJCIK Wojciech SECOMSKI Norbert ZOŁEK The Forces Driving Streaming in the Presence of Scatterers Mimicking the Blood Cells and the Contrast Agents Archives of Acoustics streaming suspension scattering acoustical driving force Doppler measurements contrast agents |
| title | The Forces Driving Streaming in the Presence of Scatterers Mimicking the Blood Cells and the Contrast Agents |
| title_full | The Forces Driving Streaming in the Presence of Scatterers Mimicking the Blood Cells and the Contrast Agents |
| title_fullStr | The Forces Driving Streaming in the Presence of Scatterers Mimicking the Blood Cells and the Contrast Agents |
| title_full_unstemmed | The Forces Driving Streaming in the Presence of Scatterers Mimicking the Blood Cells and the Contrast Agents |
| title_short | The Forces Driving Streaming in the Presence of Scatterers Mimicking the Blood Cells and the Contrast Agents |
| title_sort | forces driving streaming in the presence of scatterers mimicking the blood cells and the contrast agents |
| topic | streaming suspension scattering acoustical driving force Doppler measurements contrast agents |
| url | https://acoustics.ippt.pan.pl/index.php/aa/article/view/2587 |
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