Estimation of total circulation within a plume in a crosswind

The present paper describes an approach which may be adopted for determination of the total circulation associated with the large-scale streamwise vorticity within a plume deflected by a crosswind. The method requires a much smaller experimental data set than would otherwise be necessary in order to define the variation of circulation within the plume with distance from the source. Such data may be used to validate numerical models for the prediction of the near-field flow regime close to a pollutant source.