Bibliographic Details
| Title: |
Experimental study of the flows in a non-axisymmetric ellipsoid under precession. |
| Authors: |
Burmann, Fabian1 (AUTHOR) fabian.burmann@erdw.ethz.ch, Noir, Jérõme1 (AUTHOR) |
| Source: |
Journal of Fluid Mechanics. Feb2022, Vol. 932, p1-21. 21p. |
| Subjects: |
Ellipsoids, Astrophysical fluid dynamics, Cartesian coordinates, Laminar boundary layer, Rotational motion, Rossby number, Rotating fluid, Stellar rotation |
| Abstract: |
The angle between Graph $\boldsymbol {\varOmega } {\boldsymbol {p}}$ and Graph $\boldsymbol {\varOmega } {\boldsymbol {s}}$, i.e. the precession angle, is fixed to Graph $90^\circ$. Alternatively, since the fluid rotation is no longer close to the container axis, it may be argued that the asymptotic values of the damping coefficients Graph $\lambda r,\lambda i$ and Graph $\lambda {sup}$ are not representative of the boundary layer dynamics in this range of Graph $Po$. At very small Graph $Po\leq 0.11$, we observe only frequencies corresponding to the forcing at dimensionless frequency Graph $\varpi /\varOmega s=1$ and Graph $\varpi /\varOmega s=2$. Hence, we can use the velocity average along the chord Graph $\langle u x\rangle x$, where Graph $\langle \rangle x$ denotes the spatial average along Graph $x$, as a proxy for Graph $\omega y$. [Extracted from the article] |
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| Database: |
Engineering Source |
