Abstract
The USM-ϑ model of Bingham fluid for dense two-phase turbulent flow was developed, which combines the second-order moment model for two-phase turbulence with the particle kinetic theory for the inter-particle collision. In this model, phases interaction and the extra term of Bingham fluid yield stress are taken into account. An algorithm for USM-ϑ model in dense two-phase flow was proposed, in which the influence of particle volume fraction is accounted for. This model was used to simulate turbulent flow of Bingham fluid single-phase and dense liquid-particle two-phase in pipe. It is shown USM-ϑ model has better prediction result than the five-equation model, in which the particle-particle collision is modeled by the particle kinetic theory, while the turbulence of both phase is simulated by the two-equation turbulence model. The USM-ϑ model was then used to simulate the dense two-phase turbulent up flow of Bingham fluid with particles. With the increasing of the yield stress, the velocities of Bingham and particle decrease near the pipe centre. Comparing the two-phase flow of Bingham-particle with that of liquid-particle, it is found the source term of yield stress has significant effect on flow.
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Communicated by LI Jia-chun
Project supported by the National Key Basic Research and Development Program of China (No.G1999-0222-08)
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Zeng, Zx., Zhou, Lx. & Liu, Zh. Second-order moment model for dense two-phase turbulent flow of Bingham fluid with particles. Appl Math Mech 27, 1373–1381 (2006). https://doi.org/10.1007/s10483-006-1009-z
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DOI: https://doi.org/10.1007/s10483-006-1009-z