Vol. 30, issue 06, article # 12

Kurbatskaya L.I., Kurbatskii A.F. Computationally efficient turbulence model for pollution propagation simulation. // Optika Atmosfery i Okeana. 2017. V. 30. No. 06. P. 524–528 [in Russian].
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Abstract:

The combined effect of orography and temperature stratification on the dispersion of pollutants in an urban heat island is simulated on the basis of three-parametric E – e – <q2> (Т–RANS) approach to thermally penetrating convection above the heat island. Two models of the concentration turbulent flow are used for the dispersion of a tracer from a surface source into a stably stratified atmosphere <uic> i.e., the implicit algebraic model and calculation from a prognostic equation. The correlation <cq> between the concentration and temperature fluctuations is found from the solution of a prognostic equation in the both models. The algebraic model minimizes the difficulties in the simulation of turbulent transfer in a stably stratified atmosphere and provides for the results with acceptable accuracy as compared to the complete prognostic model of the concentration turbulent flow.

Keywords:

turbulence, stable stratification, atmospheric boundary layer, pollution dispersion, modelin

References:

    1.  Kurbackij A.F., Kurbackaja L.I. Pronikajushhaja turbulentnaja konvekcija nad ostrovom tepla v ustojchivo stratificirovannoj okruzhajushhej srede // Izv. AN. Fiz. atmosf. i okeana. 2001. V. 37, N 2. P. 1–13.
   2. Kurbackij A.F., Kurbackaja L.I. Turbulentnaja cirkuljacija nad poverhnostnym istochnikom tepla v ustojchivo stratificirovannoj okruzhajushhej srede // Teplofiz. i ajeromehanika. 2016. V. 23, N 5. P. 703–719.
   3. Lu J., Araya S.P., Snyder W.H., Lawson R.E., Jr. A laboratory study of the urban heat island in a calm and stably stratified environment // J. Appl. Meteorol. 1997. V. 36. P. 1377–1402.
   4. Rouch P. Vychislitel'naja gidrodinamika. M.: Mir, 1980. 616 p.
   5. Snyder W.H., Lawson R.E., Jr., Shipman M.S., Lu J. Fluid modeling of atmospheric dispersion in the convective boundary layer // Bound.-Layer Meteorol. 2002. V. 102. P. 335–366.
   6. Weil J.C., Snyder W.H., Lawson R.E., Jr., Shipman M.S. Experiments on buoyant plume dispersion in a laboratory convection tank // Bound.-Layer Meteorol. 2002. V. 102. P. 367–414.

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