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Dyamically changing particle properties?

Posted 17 lug 2014, 09:18 GMT-4 Charged Particle Tracing, Particle Tracing for Fluid Flow Version 4.4 1 Reply

mialdrid
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I am trying to simulate particle flow in a gaseous meidum, and account for changes in particle size due to condensation or evaporation of the carrier vapor. Does anyone know how to dynamically change particle properties (mass, diameter, etc...) based on local conditions such as temperature?
1 Reply Last Post 17 lug 2014, 09:51 GMT-4
Daniel Smith COMSOL Employee

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Posted: 1 decade ago 17 lug 2014, 09:51 GMT-4
Hi, you can enable the "Compute particle mass" option in the Particle Tracing for Fluid Flow interface, then in the Particle Properties feature enter an expression for the accretion rate. This can be temperature dependent. This will cause the mass (and hence the diameter) of the particles to change during the simulation. If the accretion rate is positive, the mass (and diameter) will increase. If the accretion rate is negative, the mass (and diameter) will decrease.

Dan
Hi, you can enable the "Compute particle mass" option in the Particle Tracing for Fluid Flow interface, then in the Particle Properties feature enter an expression for the accretion rate. This can be temperature dependent. This will cause the mass (and hence the diameter) of the particles to change during the simulation. If the accretion rate is positive, the mass (and diameter) will increase. If the accretion rate is negative, the mass (and diameter) will decrease. Dan

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