Gas turbulence modulation model for gas-solid flows in two-fluid approach |
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| Authors: | Zhuo-xiong Zeng Yang Pan Li-xing Zhou |
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| Institution: | (1) Department of Mechanical Engineering, McMaster University, Hamilton, ON, Canada, L8S 4L7;(2) Department of Chemical Engineering, McMaster University, Hamilton, ON, Canada, L8S 4L7; |
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| Abstract: | Turbulence enhancement by particle wake effect is studied by numerical simulation of gas turbulent flows passing over particle
under various particle sizes, inlet gas velocities, gas viscosity, gas density and the distance of particles. By performing
dimension analysis and using the form of gas-particle interaction source term for reference, a new semi-empirical turbulence
enhancement model by the particle-wake effect is proposed. The turbulence model is then incorporated into second-order moment
model for simulating gas-particle flows in a horizontal channel with different wall roughness and a sudden-expansion chamber.
The results show that this model is with higher calculating accuracy than another two turbulence models in comparison with
the experimental results. |
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| Keywords: | gas-particle flows turbulence modulation particle wake effect |
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