Faraday instability in a linear viscoelastic fluid
Faraday instability in a linear viscoelastic fluid
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线性粘弹性流体中的法拉第不稳定性
DOI：
10.1209/epl/i1999-00142-5
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
W. Zimmermann
中科院分区：
文献类型：
--
作者：
H. W. Müller;W. Zimmermann
从理论上研究了粘弹性流体振动层中表面波的起振问题。对于接近非牛顿流体的逆弛豫时间的振动频率，表面波响应谐波，而不是亚谐波，如通常在牛顿流体中的情况。该预测是根据粘弹性流体的麦克斯韦模型作出的，但结果是稳健的，并已通过使用2%聚异丁烯在primol中的混合物的经验粘度谱得到证实。参数范围的确定，谐波表面波的青睐。
The onset of surface waves in a vibrated layer of a viscoelastic fluid is investigated theoretically. For vibration frequencies close to the inverse relaxation time of the non-Newtonian fluid, surface waves respond harmonically instead of being subharmonic as is usually the case in Newtonian fluids. This prediction has been made on the basis of the Maxwell model for viscoelastic fluids, but the result is robust and has been confirmed by using the empiric viscosity spectrum for a mixture of 2% polyisobutylene in primol. The parameter range is determined, where harmonic surface waves are favored.