Numerical simulations of turbulent dispersion around buildings via a Lagrangian stochastic particle model
- Lawrence Livermore National Lab., CA (United States). Regional Atmospheric Sciences Div.
- National Defence Research Establishment, Umeaa (Sweden)
This paper describes a numerical modeling approach that can be used to provide estimates of air concentrations due to emissions at industrial sites or other sites where buildings may have an important impact on the dispersion patterns. The procedure consists of two sequential steps: (1) Prediction of mean flow and turbulence fields via a turbulent flow model; and (2) Employment of the calculated flow and turbulence fields to drive a Lagrangian Stochastic Particle Model. Two flow scenarios in which the approaching mean wind is assumed to be at 90{degree} and 30{degree} to the building complex are used as input to the Lagrangian model. The first calculation is based on an earlier transport and diffusion simulation that employed an existing particle-in-cell flux-gradient dispersion model. The second simulation is used to demonstrate the strong spatial variations that the concentration field exhibit within the highly complex separation zones of building wakes. The relationship between concentration levels and toxic load are discussed for the case of a chemical spill.
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 435756
- Report Number(s):
- CONF-951135-; ISBN 0-7918-1755-5; TRN: IM9710%%414
- Resource Relation:
- Conference: 1995 International mechanical engineering congress and exhibition, San Francisco, CA (United States), 12-17 Nov 1995; Other Information: PBD: 1995; Related Information: Is Part Of Proceedings of the ASME Heat Transfer and Fluids Engineering Divisions: Fluid mechanics and heat transfer in sprays; Heat, mass and momentum transfer in environmental flows; Measurement techniques in multiphase flow; Multiphase transport in porous media. HTD-Volume 321; FED-Volume 233; Hoyt, J.W. [ed.] [San Diego State Univ., CA (United States)]; O`Hern, T.J. [ed.] [Sandia National Labs., Albuquerque, NM (United States)]; Presser, C. [ed.] [National Inst. of Standards and Technology, Gaithersburg, MD (United States)] [and others]; PB: 761 p.
- Country of Publication:
- United States
- Language:
- English
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