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Numerical Modeling of Aerosol Transport and Dynamics

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Book cover Energy for Propulsion

Part of the book series: Green Energy and Technology ((GREEN))

Abstract

Flow and aerosol transport and dynamics in a reaction chamber, part of an aerosol generation system, is analyzed by coupling Computational Fluid Dynamics (CFD) and Aerosol Dynamic Equation. A predictable parametric aerosol output from reaction chamber is desirable for different contexts. The effect of residence time of the aerosol particles and mixing characteristics of the flow on the aerosol size distribution is analyzed using the ANSWER finite volume CFD code. The ANSWER uses the steady state turbulent flow field to solve the General Dynamics Equations (GDE) for the aerosol particles. The GDE includes mechanisms such as coagulation, gravitational settling and thermophoretic drift etc. A volume (and mass) preserving nodal method is implemented to model particle distribution changes due to coagulation. The modules modeling coagulation and gravitational settling were validated with respect to analytical solutions taken from the literature. The size distribution in reaction chamber design is seen to be robust for various flow scenarios at inlet number concentration of 1 × 1012/m3. This is explained by flow time scale being much smaller than coagulation time scale. At higher inlet concentration of 1 × 1015/m3 the average size distribution and outlet size distribution are significantly shifted from the inlet distribution, due to the much lower coagulation time scale. A noticeable difference between no or low swirl and high swirl flow is seen. A secondary ring inlet within the reaction chamber was seen to lead to identical aerosol distribution for different flow scenarios even at higher inlet concentration.

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Author information

Authors and Affiliations

  1. CFDVRi, Mount View Complex, McLeod Ganj, Dharamshala, Himachal Pradesh, 176219, India

    P. S. Rajagopal, Janki Shinde, Akshai K. Runchal & Madhukar M. Rao

  2. Bhabha Atomic Research Centre, Mumbai, India

    Manish Joshi, S. Anand & B. K. Sapra

  3. Indian Institute of Technology - Bombay, Mumbai, India

    Y. S. Mayya

Authors
  1. P. S. Rajagopal
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  2. Manish Joshi
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  3. Janki Shinde
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  4. S. Anand
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  5. Akshai K. Runchal
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  6. B. K. Sapra
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  7. Y. S. Mayya
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  8. Madhukar M. Rao
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Corresponding author

Correspondence to P. S. Rajagopal .

Editor information

Editors and Affiliations

  1. ACRI, The CFD Innovators, Los Angeles, California, USA

    Akshai K. Runchal

  2. Department of Mechanical Engineering, University of Maryland, Department of Mechanical Engineering, College Park, Maryland, USA

    Ashwani K. Gupta

  3. Department of Aerospace Engineering, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India

    Abhijit Kushari

  4. Department of Aerospace Engineering, Indian Institute of Technology Kanpur, Department of Aerospace Engineering, Kanpur, Uttar Pradesh, India

    Ashoke De

  5. Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Department of Mechanical Engineering, Chicago, Illinois, USA

    Suresh K. Aggarwal

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Rajagopal, P.S. et al. (2018). Numerical Modeling of Aerosol Transport and Dynamics. In: Runchal, A., Gupta, A., Kushari, A., De, A., Aggarwal, S. (eds) Energy for Propulsion . Green Energy and Technology. Springer, Singapore. https://doi.org/10.1007/978-981-10-7473-8_14

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  • DOI: https://doi.org/10.1007/978-981-10-7473-8_14

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-10-7472-1

  • Online ISBN: 978-981-10-7473-8

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