Question

which release model is used to model the vapor cloud behavior of positively buoyant gases.

Answer 1

For a positively buoyant gas, continuous (plumes) release-time model is used to monitor the vapor cloud behavior.

More information:

In the study of atmospheric pollution, there are three types of vapor cloud behavior such as neutrally buoyant gas, positively buoyant gas and dense buoyant gas.

Correspondingly, three release-time models are considered such as Instantaneous i.e puff model, Continuous i.e. plumes model and Time varying continuous model.