Numerical Simulations of Heat Transfer in Taylor-Couette Flow
Numerical Simulations of Heat Transfer in Taylor-Couette Flow
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DOI：
10.1115/1.2830066
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发表时间：
1998-02
影响因子：
--
通讯作者：
R. Kedia;M. Hunt;T. Colonius
中科院分区：
文献类型：
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作者：
R. Kedia;M. Hunt;T. Colonius
通过数值模拟研究了重力势和离心势对加热不可压Taylor-Couette流稳定性的影响。流动被限制在两个不同加热的同心圆筒之间，并且允许内圆筒旋转。Navier-Stokes方程和耦合的能量方程使用谱方法求解。为了验证代码，与现有的线性稳定性分析和实验进行比较。该代码是用来计算局部和平均传热系数为固定的雷诺数（Re = 100）和Grashof数的范围。研究主要限于半径比0.5和0。7的流体与普朗特数约0.7。研究了圆柱表面局部换热系数的变化规律，给出了不同稳定状态的流动图。计算结果表明，在轴对称泰勒涡流动状态下，传热量随Grashof数的增加而减小，在非轴对称流动状态下，传热量随Grashof数的增加而增加
Numerical simulations have been performed to study the effects of the gravitational and the centrifugal potentials on the stability of heated, incompressible Taylor-Couette flow. The flow is confined between two differentially heated, concentric cylinders, and the inner cylinder is allowed to rotate. The Navier-Stokes equations and the coupled energy equation are solved using a spectral method. To validate the code, comparisons are made with existing linear stability analysis and with experiments. The code is used to calculate the local and average heat transfer coefficients for a fixed Reynolds number (Re = 100) and a range of Grashof numbers. The investigation is primarily restricted to radius ratios 0.5 and 0. 7 for fluids with Prandtl number of about 0.7. The variation of the local coefficients of heat transfer on the cylinder surface is investigated, and maps showing different stable states of the flow are presented. Results are also presented in terms of the equivalent conductivity, and show that heat transfer decreases with Grashof number in axisymmetric Taylor vortex flow regime, and increases with Grashof number after the flow becomes nonaxisymmetric