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Effect of nonlinearity on the Taylor-Couette flow in the narrow-gap
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  • Effect of nonlinearity on the Taylor-Couette flow in the narrow-gap
  • Effect of nonlinearity on the Taylor-Couette flow in the narrow-gap
저자명
Ashrafi. Nariman
간행물명
Journal of mechanical science and technology
권/호정보
2011년|25권 9호|pp.2247-2257 (11 pages)
발행정보
대한기계학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

The shear thinning Taylor-Couette flow is studied in the narrow gap limit. The fluid is assumed to follow the Carreau-Bird model and mixed boundary conditions are imposed. The low-order dynamical system, resulted from Galerkin projection of the conservation of mass and momentum equations, includes additional nonlinear terms in the velocity components originated from the shear-dependent viscosity. It is observed that the base flow loses its radial flow stability to the vortex structure at a lower critical Taylor number as the shear thinning effects increases. The emergence of the vortices corresponds to the onset of a supercritical bifurcation which is also seen in the flow of a linear fluid. Complete flow field together with stress and viscosity maps are presented for different scenarios in the flow regime.