Mass-consistent wind field

Mass-consistent wind field The wind field obeys the basic law relating the wind and mass fields. 

The third level of complexity in airshed modeling involves the solution of the partial differential equations of conservation of mass. While the computational requirements for this class of models are much greater than for the box model or the plume and puff models, this approach permits the inclusion of chemical reactions, time-varying meteorological conditions, and complex source emissions patterns. However, since this model consists only of the conservation equations, variables associated with the momentum and energy equations—e.g., wind fields and the vertical temperature structure—must be treated as inputs to the model. The solution of this class of models will be examined here. 

Solution of the continuity equation for the wind field determination (diagnostic methods). These methods impose mass consistency on the flow field through appropriate equations and can crudely simulate terrain-blocking effects (Goodin et al., 1979). They still require den.se observations to produce reasonable results. 

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