刘诚,沈永明,唐军.水平方管内固液两相流运动特性数值模拟[J].水利学报,2007,38(7):767-773 |
水平方管内固液两相流运动特性数值模拟 |
Numerical simulation of liquid particle two phase flow in horizontal rectangular pipes |
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DOI: |
中文关键词: 三维k-ε-kp模型 固液两相流 时均运动特性 脉动特性 |
英文关键词: 3-D k-ε-kp turbulence model, liquid particle two phase flow time averaged velocity fluctuation velocity |
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中文摘要: |
将周力行建立的k-ε-kp两相湍流模型引入固液两相流的研究中,对水平方管内挟沙
水流固液两相的时均特性、脉动特性以及颗粒密度分布进行了数值模拟。将计算结果与k-ε-Ap模型、动理论计算结果以及物理模型试验观测结果进行了比较,发现k-ε-k
p模型数值计算和物理模型试验观测结果的一致性较好;和k ε Ap模型相比,由于考虑了颗粒相的湍动特性在固液两相流中的作用,k-ε-k-p两相湍流模型可以得到颗粒的脉动速度分布;和动理论相比,k-ε-kp模型无法准确地预测固相的垂向脉动速度,需要引入各向异性的两相流模型。 |
英文摘要: |
The k-ε-kpturbulence model for two phase flow developed by ZHOU is applied to numerically investigate the time averaged characteristics, fluctuation characteristics and particle density distribution of liquid particle flow in horizontal rectangular pipes. The simulation result is compared with the calculat
ion result using k-ε-Apmodel and using kinetic theory as well as the physical model test. It is found that the simulation result of k-ε-kp turbulence model is in good agreement with physical model test. Since the effect of particle turbulence is taken into account and the velocity fluctuation of particles can be deduced, the result of k-ε-kpturbulence model is better than that of k-ε-Apmodel. Furthermore, the comparison with the calculation result of kinetic theory shows that since the k-ε-kpturbulence model can not precisely predict the vertical fluctuation velocities of particles,
an anisotropic two phase model must be developed. |
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