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Nanoparticle distribution in a rotating curved pipe considering coagulation and dispersion

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Abstract

We study the evolution of the particle number concentration, mass concentration, particle polydispersity, particle diameter and geometric standard deviation considering particle coagulation and dispersion in a rotating curved pipe at different Reynolds number, Schmidt number and F number. It is found that, when the Coriolis force and the centrifugal force point to the same direction, particles concentrate near the outside edge of the pipe, which becomes more obvious as time goes by. The particle number and mass concentration increase faster at the early stage than that at the later stage, and approach a stable value finally. As the coagulation proceeds, the particle diameter, polydispersity and geometric standard deviation increase and have high values in the region close to the outside edge of the pipe. When the Coriolis force and the centrifugal force point to the opposite direction and the Coriolis force is more dominant than the centrifugal force, particles concentrate near the inside edge of the pipe. The particles in the region with a high number concentration have high mass concentration, large diameter and high polydispersity as well as large geometric standard deviation. The particle distribution is dependent on the balance of the pipe curvature and rotating speed. The Reynolds number and the Schmidt number have effects on the particle distribution when other parameters remain unchanged. An increase in the Reynolds number leads to an increase in particle number concentration and mass concentration, and a decrease in particle polydispersity, particle diameter and geometric standard deviation. With the increase of Schmidt number the particle number concentration and mass concentration increase, and the particle polydispersity, particle diameter and geometric standard deviation decrease.

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Authors and Affiliations

  1. Department of Mechanics, Zhejiang University, Hangzhou, 310027, China

    JianZhong Lin & PeiFeng Lin

  2. China Jiliang University, Hangzhou, 310018, China

    JianZhong Lin

  3. Department of Mechanical Engineering, University of Nevada, Las Vegas, NV, 89154, USA

    HuaJun Chen

Authors
  1. JianZhong Lin
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  2. PeiFeng Lin
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  3. HuaJun Chen
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Correspondence to JianZhong Lin.

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Lin, J., Lin, P. & Chen, H. Nanoparticle distribution in a rotating curved pipe considering coagulation and dispersion. Sci. China Phys. Mech. Astron. 54, 1502–1513 (2011). https://doi.org/10.1007/s11433-011-4386-x

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  • DOI: https://doi.org/10.1007/s11433-011-4386-x

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