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Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

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Dyamically changing particle properties?

Posted Jul 17, 2014, 9:18 a.m. EDT 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 Jul 17, 2014, 9:51 a.m. EDT
Daniel Smith COMSOL Employee

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Posted: 10 years ago Jul 17, 2014, 9:51 a.m. EDT
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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