Nucleation studies in supersonic flow


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Date

2022-06

Publication Type

Book Chapter

ETH Bibliography

yes

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Abstract

Supersonic flow offers a unique opportunity to follow the evolution of an aerosol on the microsecond timescale. The initial appearance of the droplets/particles and their further development can involve a number of nucleation steps: homogeneous nucleation from the supersaturated vapor to the (supercooled) liquid, nucleation of a solid phase from the supercooled liquid, and even heterogeneous nucleation of other species onto pre-existing particles. In this chapter, we present basic concepts from nucleation theory, the experimental techniques used to characterize the thermodynamic state of the flow as well as the size, state and composition of the aerosol, and the approaches used to determine nucleation rates. The nucleation experiments that have been conducted both within and at the exit of Laval nozzles are summarized, and the importance of experiments conducted in supersonic flows to advancing the field of nucleation is discussed.

Publication status

published

Book title

Uniform Supersonic Flows in Chemical Physics: Chemistry Close to Absolute Zero Studied Using the CRESU Method

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Pages / Article No.

351 - 392

Publisher

World Scientific

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Subject

Nucleation; Supersonic flow; Phase transitions

Organisational unit

03961 - Signorell, Ruth / Signorell, Ruth check_circle

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Is part of: 10.1142/q0324