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Not particle movement when using massless formulation in particle tracing module.
Posted 24 feb 2012, 01:44 GMT-5 Charged Particle Tracing, Fluid & Heat, Particle Tracing for Fluid Flow Version 5.1 2 Replies
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I ran a model of an rod extrusion die by using the laminar and non Newtonian flow formulation. Afterwards, I implemented particle tracing module looking forward to finding the time that takes for the particles to exit the die. This time is called "residence time".
When using Newtonian formulation and implemented the drag force condition my model works fine. But regarding this formulation, I don't know what density of the particle to choose. Should I select the density of the material in the laminar flow formulation?
On the other hand, the particles in my model must be mass-less, but I don't obtain any answer, every time I implement this formulation. My answer is zero particles in the domain, and not warnings are showing by COMSOL.
I wonder if somebody knows what kind of additional conditions I should implement in the mass-less formulation? How can I achieve movement in the particles when using mass-less formulation?
When using Newtonian formulation and implemented the drag force condition my model works fine. But regarding this formulation, I don't know what density of the particle to choose. Should I select the density of the material in the laminar flow formulation?
On the other hand, the particles in my model must be mass-less, but I don't obtain any answer, every time I implement this formulation. My answer is zero particles in the domain, and not warnings are showing by COMSOL.
I wonder if somebody knows what kind of additional conditions I should implement in the mass-less formulation? How can I achieve movement in the particles when using mass-less formulation?
2 Replies Last Post 25 feb 2012, 14:51 GMT-5
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Posted:
1 decade ago
When you use massless particles make sure you set the Particle Velocity in the Particle Properties node to u, v and w (for the x, y and z components).
Nagi Elabbasi
Veryst Engineering
Nagi Elabbasi
Veryst Engineering
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Posted:
1 decade ago
Thank you so much,
The problem was the velocity. Now, I have the results that I was looking for.
The problem was the velocity. Now, I have the results that I was looking for.