A two-dimensional flow modeling over complex topography for dispersion of air pollution


Erdun H., Incecik S.

10th Regional IUAPPA Conference, İstanbul, Turkey, 23 - 26 September 1997, pp.405-415 identifier

  • Publication Type: Conference Paper / Full Text
  • City: İstanbul
  • Country: Turkey
  • Page Numbers: pp.405-415

Abstract

Dispersion of atmospheric pollutants over complex terrain often restricted by meteorological and boundary conditions. In numerical modeling of the dispersion, terrain is the lower boundary of the domain. It should be defined in a realistic form. Other characteristic is the grid-mesh structure. Generally the meteorological model's grid structure is non-orthogonal. The non-orthogonal grid structures result in more computational time with extra terms according to orthogonal system. They are also and limited with slopes much less than 45 degrees in topography. Schwarz-Christoffel transformation is used to define in accuracy the topography and to generate orthogonal grid mesh. This kind of transformation allows generating fine mesh near the ground and coarse mesh above,