Virtual plume

A bench-top model of a chemical plume in a turbulent flow, a Virtual Plume, was built to simulate the behavior of a turbulent chemical plume. It is ba sed on an eight-channel FIA/SIA system and an array of eight amperometric s ensors. A plug of sample solution was delivered to me sensors after passing through delay and dispersion elements. Adjusting these two elements enable d us to simulate the rime-concentration profile at any arbitrary point in t he plume. It has been shown that an eight-channel system can simulate an ar bitrary sensor array positioned in a turbulent plume. Preliminary correlati on of the shape of the peaks obtained in the VP with those recorded using p lanar laser-induced fluorescence in a turbulent flow shows the value of thi s approach.