Research on Coherent Structures in a Mixing Layer of the FENE-P Polymer Solution

SHAO Xue-ming; LIN Jian-zhong; YU Zhao-sheng

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Article Navigation > Applied Mathematics and Mechanics > 2001 > 22(3): 259-266

SHAO Xue-ming, LIN Jian-zhong, YU Zhao-sheng. Research on Coherent Structures in a Mixing Layer of the FENE-P Polymer Solution[J]. Applied Mathematics and Mechanics, 2001, 22(3): 259-266.

Citation:

SHAO Xue-ming, LIN Jian-zhong, YU Zhao-sheng. Research on Coherent Structures in a Mixing Layer of the FENE-P Polymer Solution[J]. Applied Mathematics and Mechanics, 2001, 22(3): 259-266.

Citation:

SHAO Xue-ming, LIN Jian-zhong, YU Zhao-sheng. Research on Coherent Structures in a Mixing Layer of the FENE-P Polymer Solution[J]. Applied Mathematics and Mechanics, 2001, 22(3): 259-266.

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Research on Coherent Structures in a Mixing Layer of the FENE-P Polymer Solution

1.
Department of Mechanics, Zhejiang University, Hangzhou 310027, P R China;
2.
State Key Laboratory of Fluid Transmission and Control, Hangzhou 310027, P R China

Received Date: 1999-12-21
Rev Recd Date: 2000-09-20
Publish Date: 2001-03-15

Abstract

Abstract

The evolution of the coherent structures in a two-dimensional time-developing mixing layer of the FENE-P fluids is examined numerically.By the means of an appropriate filtering for the polymer stress,some characteristics of the coherent structures at high b were obtained,which Azaiez and Homsy did not address.The results indicate that adding polymer to the Newtonian fluids wil cause stronger vorticity diffusion,accompanied with weaker fundamental and subharmonical perturbations and slower rotational motion of neighboring vortices during pairing.This effect decreases with the Weissenberg number,but increases with b.In addition,the time when the consecutive rollers are completely coalesced into one delays in the viscoelatic mixing layer compared with the Newtonian one of the same total viscosity.
- mixing layers,
- coherent structures,
- FENE-P model,
- pseudo-spectral method

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References(8)

References

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