An obvious extension to a simple Gaussian plume model is to add a mixing layer. This is important for elevated stacks, as it can lead to fumigation. This is also a standard extension to a Gaussian plume model for regulatory screening applications.
There are two ways of implementing this:
- Simple reflection off the mixing layer -- basically adding a series of exp(..)'s to the end of a standard Gaussian plume
- Periodic functions
Both of these are infinite sums. Some regulatory models specify only one or the other, some specify choosing a particular model based on the height of the mixing layer.
An obvious extension to a simple Gaussian plume model is to add a mixing layer. This is important for elevated stacks, as it can lead to fumigation. This is also a standard extension to a Gaussian plume model for regulatory screening applications.
There are two ways of implementing this:
Both of these are infinite sums. Some regulatory models specify only one or the other, some specify choosing a particular model based on the height of the mixing layer.