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Particle Size Issue for Particle Tracing in COMSOL
Posted Feb 1, 2017, 5:20 p.m. EST Fluid & Heat, Computational Fluid Dynamics (CFD) Version 5.0, Version 5.1, Version 5.2 1 Reply
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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?
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?
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1 Reply Last Post Feb 1, 2017, 6:46 p.m. EST
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Posted:
8 years ago
Problem solved by using "Radius scale factor", just setting it to 1