The Bernoulli integral for a certain class of non-stationary viscous vortical flows of incompressible fluid
Article
Article Title | The Bernoulli integral for a certain class of non-stationary viscous vortical flows of incompressible fluid |
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ERA Journal ID | 406 |
Article Category | Article |
Authors | Stepanyants, Y. A. (Author) and Yakubovich, E. I. (Author) |
Journal Title | Studies in Applied Mathematics |
Journal Citation | 135 (3), pp. 295-309 |
Number of Pages | 15 |
Year | 2015 |
Place of Publication | United States |
ISSN | 0022-2526 |
1467-9590 | |
Digital Object Identifier (DOI) | https://doi.org/10.1111/sapm.12087 |
Web Address (URL) | http://onlinelibrary.wiley.com/doi/10.1111/sapm.12087/epdf |
Abstract | It has been shown in our previous paper that there is a wide class of 3D motions of incompressible viscous fluid which can be described by one scalar function dabbed the quasi-potential. This class of fluid flows is characterized by three-component velocity field having two-component vorticity field; both these fields can depend of all three spatial variables and time, in general. Governing equations for the quasi-potential have been derived and simple illustrative example of 3D flow has been presented. Here, we derive the Bernoulli integral for that class of flows and compare it against the known Bernoulli integrals for the potential flows or 2D stationary vortical flows of inviscid fluid. We show that the Bernoulli integral for this class of fluid motion possesses unusual features: it is valid for the vortical nonstationary motions of a viscous incompressible fluid. We present a new very nontrivial analytical example of 3D flow with two-component vorticity which hardly can be obtained by any of known methods. In the last section, we suggest a generalization of the developed concept which allows one to describe a certain class of 3D flows with the 3D vorticity. |
Keywords | Bernoulli integral; viscous flow; incompressible fluid |
ANZSRC Field of Research 2020 | 401207. Fundamental and theoretical fluid dynamics |
490109. Theoretical and applied mechanics | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | School of Agricultural, Computational and Environmental Sciences |
Russian Academy of Sciences, Russia | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q30yx/the-bernoulli-integral-for-a-certain-class-of-non-stationary-viscous-vortical-flows-of-incompressible-fluid
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