000014561 001__ 14561
000014561 005__ 20161115100155.0
000014561 04107 $$aeng
000014561 046__ $$k2016-08-21
000014561 100__ $$aTao, Jianjun
000014561 24500 $$aHelical-wave instabilities of an annulus flow in a helical magnetic field

000014561 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000014561 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000014561 506__ $$arestricted
000014561 520__ $$2eng$$aThe stabilities of an annulus flow with an external helical magnetic field is studied theoretically and numerically by using the quasi-static approximation. For the case with zero axial pressure gradient, it is shown numerically that when the Reynolds number is larger than a threshold value, the helical magnetic field will yield a right-handed traveling-wave instability. At higher Reynolds numbers, the first wave mode is superposed by a secondary anti-symmetric helical wave mode, which travels in the opposite direction of the first one. Linear stability analysis is carried out, and the critical parameters of the most unstable mode are consistent quantitatively with the numerical observations. Furthermore, when a finite axial pressure gradient is applied to guarantee a zero axial flow rate, the annulus flow is found to be more unstable than the case with zero axial pressure gradient.

000014561 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000014561 653__ $$a

000014561 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000014561 720__ $$aTao, Jianjun
000014561 8560_ $$ffischerc@itam.cas.cz
000014561 8564_ $$s180360$$uhttps://invenio.itam.cas.cz/record/14561/files/TS.FM07-1.04.pdf$$yOriginal version of the author's contribution as presented on CD,  page 917, code TS.FM07-1.04
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000014561 962__ $$r13812
000014561 980__ $$aPAPER