| Title:
|
Regularity criterion for 3D Navier-Stokes equations in terms of the direction of the velocity (English) |
| Author:
|
Vasseur, Alexis |
| Language:
|
English |
| Journal:
|
Applications of Mathematics |
| ISSN:
|
0862-7940 (print) |
| ISSN:
|
1572-9109 (online) |
| Volume:
|
54 |
| Issue:
|
1 |
| Year:
|
2009 |
| Pages:
|
47-52 |
| Summary lang:
|
English |
| . |
| Category:
|
math |
| . |
| Summary:
|
In this short note we give a link between the regularity of the solution $u$ to the 3D Navier-Stokes equation and the behavior of the direction of the velocity $u/|u|$. It is shown that the control of ${\rm Div}(u/|u|)$ in a suitable $L_t^p(L_x^q)$ norm is enough to ensure global regularity. The result is reminiscent of the criterion in terms of the direction of the vorticity, introduced first by Constantin and Fefferman. However, in this case the condition is not on the vorticity but on the velocity itself. The proof, based on very standard methods, relies on a straightforward relation between the divergence of the direction of the velocity and the growth of energy along streamlines. (English) |
| Keyword:
|
Navier-Stokes |
| Keyword:
|
fluid mechanics |
| Keyword:
|
regularity |
| Keyword:
|
PRodi-Serrin criteria |
| MSC:
|
35B65 |
| MSC:
|
35Q30 |
| MSC:
|
76D03 |
| MSC:
|
76D05 |
| idZBL:
|
Zbl 1212.35354 |
| idMR:
|
MR2476020 |
| DOI:
|
10.1007/s10492-009-0003-y |
| . |
| Date available:
|
2010-07-20T12:44:49Z |
| Last updated:
|
2020-07-02 |
| Stable URL:
|
http://hdl.handle.net/10338.dmlcz/140348 |
| . |
| Reference:
|
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| Reference:
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