Thermal convection of viscoelastic shear-thinning fluids

被引:2
|
作者
Albaalbaki, Bashar [1 ]
Khayat, Roger E. [1 ]
Ahmed, Zahir U. [1 ,2 ]
机构
[1] Univ Western Ontario, Dept Mech & Mat Engn, London, ON N6A 5B9, Canada
[2] Khulna Univ Engn & Technol, Dept Mech Engn, Khulna 9203, Bangladesh
关键词
Rayleigh-Benard convection; viscoelasticity; nonlinear treatment; RAYLEIGH-BENARD CONVECTION; WEAKLY NONLINEAR-ANALYSIS; PATTERN SELECTION; MAGNETIC FLUID; FLOWS; CHAOS; INSTABILITIES; TRANSITION; BEHAVIOR; CHANNEL;
D O I
10.1088/0169-5983/48/6/061406
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
The Rayleigh-Benard convection for non-Newtonian fluids possessing both viscoelastic and shear-thinning behaviours is examined. The Phan-Thien-Tanner (PTT) constitutive equation is implemented to model the non-Newtonian character of the fluid. It is found that while the shear-thinning and viscoelastic effects could annihilate one another for the steady roll flow, presence of both behaviours restricts the roll stability limit significantly compared to the cases when the fluid is either inelastic shear-thinning or purely viscoelastic with constant viscosity.
引用
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页数:25
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