Details
| Original language | English |
|---|---|
| Article number | 1350019 |
| Number of pages | 37 |
| Journal | Journal of computational acoustics |
| Volume | 21 |
| Issue number | 4 |
| Publication status | Published - 5 Dec 2013 |
Abstract
This paper is concerned with the numerical examination of acoustically driven flows within the inner ear on the basis of a computational model. For this purpose, a comprehensive system of differential equations and boundary conditions is deduced, which takes, to a satisfactory extent, the complexity of the main biophysical mechanisms of the cochlea into account. Beside an appropriate representation of the fluid dynamics, also the biomechanical properties of the basilar membrane as well as the internal amplification mechanism caused by the outer hair cell motility are considered in order to get realistic estimates of the structure and magnitude of the mean flow field. The present paper introduces a two-stage approach for the numerical evaluation of the solutions on the basis of the finite element method. The first step deals with the calculation of the linear acoustic reaction whereas the second step is associated with the determination of a first-order approximation of the acoustic streaming field. It is shown that the results are essentially consistent with measurements as well as analytical and experimental considerations. In addition, the numerical estimates of the acoustically driven flows provide an instrument for a more profound discussion on their physiological impact.
Keywords
- Acoustic streaming, Cochlea, Fluid-structure interaction
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Acoustics and Ultrasonics
- Mathematics(all)
- Applied Mathematics
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In: Journal of computational acoustics, Vol. 21, No. 4, 1350019, 05.12.2013.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Numerical simulation of acoustic streaming within the cochlea
AU - Gerstenberger, Christian
AU - Wolter, Franz Erich
PY - 2013/12/5
Y1 - 2013/12/5
N2 - This paper is concerned with the numerical examination of acoustically driven flows within the inner ear on the basis of a computational model. For this purpose, a comprehensive system of differential equations and boundary conditions is deduced, which takes, to a satisfactory extent, the complexity of the main biophysical mechanisms of the cochlea into account. Beside an appropriate representation of the fluid dynamics, also the biomechanical properties of the basilar membrane as well as the internal amplification mechanism caused by the outer hair cell motility are considered in order to get realistic estimates of the structure and magnitude of the mean flow field. The present paper introduces a two-stage approach for the numerical evaluation of the solutions on the basis of the finite element method. The first step deals with the calculation of the linear acoustic reaction whereas the second step is associated with the determination of a first-order approximation of the acoustic streaming field. It is shown that the results are essentially consistent with measurements as well as analytical and experimental considerations. In addition, the numerical estimates of the acoustically driven flows provide an instrument for a more profound discussion on their physiological impact.
AB - This paper is concerned with the numerical examination of acoustically driven flows within the inner ear on the basis of a computational model. For this purpose, a comprehensive system of differential equations and boundary conditions is deduced, which takes, to a satisfactory extent, the complexity of the main biophysical mechanisms of the cochlea into account. Beside an appropriate representation of the fluid dynamics, also the biomechanical properties of the basilar membrane as well as the internal amplification mechanism caused by the outer hair cell motility are considered in order to get realistic estimates of the structure and magnitude of the mean flow field. The present paper introduces a two-stage approach for the numerical evaluation of the solutions on the basis of the finite element method. The first step deals with the calculation of the linear acoustic reaction whereas the second step is associated with the determination of a first-order approximation of the acoustic streaming field. It is shown that the results are essentially consistent with measurements as well as analytical and experimental considerations. In addition, the numerical estimates of the acoustically driven flows provide an instrument for a more profound discussion on their physiological impact.
KW - Acoustic streaming
KW - Cochlea
KW - Fluid-structure interaction
UR - http://www.scopus.com/inward/record.url?scp=84891400700&partnerID=8YFLogxK
U2 - 10.1142/S0218396X13500197
DO - 10.1142/S0218396X13500197
M3 - Article
AN - SCOPUS:84891400700
VL - 21
JO - Journal of computational acoustics
JF - Journal of computational acoustics
SN - 0218-396X
IS - 4
M1 - 1350019
ER -