Abstract:
The numerical model MIMO is a three-dimensional model for simulating microscale wind
#ow and dispersion of pollutants in built-up areas. It solves the Reynolds averaged conservation
equations for mass, momentum and energy. Additional transport equations for humidity,
liquid water content and passive pollutants can be solved. The Reynolds stresses and turbulent
#uxes of scalar quantities can be calculated by several linear and nonlinear turbulence models.
A staggered grid arrangement is used and coordinate transformation is applied to allow nonequidistant
meshsize in all three dimensions in order to achieve a high resolution near the ground
and near obstacles. The model was validated for a variety of test cases and it was applied
successfully to air pollution problems.