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Using a variable to plot droplet mass or diameter in a 2D flow focusing device
Posted 02.04.2017, 11:39 GMT-4 Materials, Parameters, Variables, & Functions Version 5.1 0 Replies
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I'm having a problem with my comsol model, and i'm pretty sure it's because i'm doing something wrong with my syntax. I have a model of a flow focusing device where oil is injected in one arm of the geometry, and water in the other two arms, all at varying flow rates. I'm trying to plot droplet mass and diameter for my postprocessing, but due to my lack in experience, i just can't get it right. My model geometry is in 2D (not axisymmetric).
The model is very comparable in working and geometry to this: www.comsol.com/paper/download/181819/abrishamkar_presentation.pdf
The major difference is that my model uses oil-in-water, and the model in the link uses water-in-oil.
my current guess for defining droplett mass is this: intop1(rho1*phils*(y<0.5[mm])*pi*x)
rho1 being the density of the oil, 0.5mm being the threshold for the y-coordinate where the fluid will have passed the inlet geometry.
The way it is now, plotting the droplett mass against time in a global 1d plot will show the mass going negative, sometimes as much as it's positive maximum.
I would be very happy if someone could put me on the right path, link me to some tutorial materials on this specific subject (i don't quite know what to look for) or just give the solution to my problem outright.
Hello Jan De Vries
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