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Non Linear Vortex Structures in Stratified Fluid Driven by Small-Scale Helical Force ()

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In this work, we consider the effect of a small-scale helical driving force on fluid with a stable temperature gradient with Reynolds number . At first glance, this system does not have any instability. However, we show that a large scale vortex instability appears in the fluid despite its stable stratification. In a non-linear mode this instability becomes saturated and gives a large number of stationary spiral vortex structures. Among these structures there is a stationary helical soliton and a kink of the new type. The theory is built on the rigorous asymptotical method of multi-scale development.

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*Open Journal of Fluid Dynamics*, Vol. 3 No. 2, 2013, pp. 64-74. doi: 10.4236/ojfd.2013.32009.

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The authors declare no conflicts of interest.

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