Effect of boundary conditions on particle?fluid convection heat transfer

Li SUN  Nan ZHANG  Xinhua LIU  Yiping FAN

doi:10.12034/j.issn.1009-606X.219118

The Chinese Journal of Process Engineering >

2019 , Vol. 19 >Issue 6: 1075 - 1084

DOI: https://doi.org/10.12034/j.issn.1009-606X.219118

Flow & Transfer

Effect of boundary conditions on particle?fluid convection heat transfer

Li SUN Nan ZHANG Xinhua LIU Yiping FAN

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1. State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China 2. State Key Laboratory of Heavy Oil, China University of Petroleum (Beijing), Beijing 102249, China

Received date: 2019-01-22

Revised date: 2019-03-31

Online published: 2019-12-22

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Abstract

The effect of boundary conditions including the constant temperature and the uniform heat flux as well as the fluid?solid coupling boundary conditions on particle–fluid convection heat transfer were investigated by numerical simulation in this work. It was found that the time- and surface-averaged Nusselt numbers obtained by the fluid–solid coupling and the constant temperature boundary conditions matched well with the empirical formula, while the simulation result of the uniform heat flux boundary condition was larger than those of the other two boundary conditions. The distribution of the time- and surface-averaged local Nusselt number indicated that when the flow was in the steady symmetric regime, the Nusselt number decreased from the front stagnation point to the rear stagnation point. While the flow was in the unsteady vortex regime, the time- and surface-averaged local Nusselt number firstly decreased from its maximum at the front stagnation point to a minimum value near the separation point, and then gradually increased to the rear stagnation point.

Key words： particle-fluid convective heat transfer; fluid-solid coupled heat transfer; numerical simulation; nusselt number; reynolds number; separation angle

Cite this article

Li SUN Nan ZHANG Xinhua LIU Yiping FAN . Effect of boundary conditions on particle?fluid convection heat transfer[J]. The Chinese Journal of Process Engineering, 2019 , 19(6) : 1075 -1084 . DOI: 10.12034/j.issn.1009-606X.219118

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