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Solitons as Dissipative Structures

机译:孤子作为耗散结构

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I review here recent results regarding the excitation of nonlinear interfacial oscillations,and hence waves,at the surface of a liquid or at the interface separating two liquids when a thermal gradient is imposed or there is adsorption,and subsequent absorption in the bulk,of a(light)surfactant,hence creating tangential stresses due to the surface tension gradient(Marangoni effect).I also recall their solitonic features upon collisions and boundary reflections,etc.,even though the proposed evolution equations are not hyperbolic but a parabolic-hyperbolic combination like a dissipation-modified Boussinesq-Korteweg-de Vries equation.Theory,numerics,and experiments support my claim that solitons can exist and survive in a dissipative medium provided,for example,past an instability threshold,there is an appropriate input-output energy balance.This is very much like(steady)dissipative structures and,indeed,(nonlinear)waves traveling with constant velocity in the moving frame are steady dissipative structures.
机译:我在这里回顾了有关非线性界面振荡的激发的最新结果,因此,当施加热梯度或存在吸附以及随后大量吸收时,在液体表面或在分离两种液体的界面处的波动。 (光)表面活性剂,由于表面张力梯度而产生切向应力(Marangoni效应)。我还回忆了它们在碰撞和边界反射等情况下的孤子特征,即使所提出的演化方程不是双曲线的,而是抛物线-双曲线的组合像耗散修正的Boussinesq-Korteweg-de Vries方程。理论,数值和实验都支持我的说法,即孤子可以在耗散介质中存在并生存,例如,提供不稳定性阈值,适当的输入输出能量平衡。这非常类似于(稳定)耗散结构,实际上,(非线性)在移动框架中以恒定速度传播的波是稳定的diss。语调结构。

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