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Particle Size Issue for Particle Tracing in COMSOL

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Hi, everyone.

I am facing an interesting issue in COMSOL : the radius of the particle I wanna trace does not change even I change the radius size/number.

I am simulating a microfluid--droplet ejection. My plan is to see how the droplet moves in the pinch-off process. I am using the node "Particle Tracing" under velocity node. My geometry is in micro scale--the nozzle is 25 um and droplet or fluid is also around 25 um. So I set the radius of the particle is 2.5e-8 m. But as shown in my attached picture, the particle is too big. so I change them into 1e-10 m, however still same size particle is there, nothing change.

I was wonder how this happen. Is there a limit for comsol to represent the particle size?


1 Reply Last Post 1 févr. 2017, 18:46 UTC−5

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Posted: 8 years ago 1 févr. 2017, 18:46 UTC−5
Problem solved by using "Radius scale factor", just setting it to 1
Problem solved by using "Radius scale factor", just setting it to 1

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